citation("sdmTMB").Fix crash with betabinomial and binomial when a response value
was NA but the corresponding weights argument
(turned into ‘size’) was not NA.
Add simulate_new() as a synonym for
sdmTMB_simulate(). simulate_new() is
recommended going forward because it is more expressive.
Refactor get_cog(),
get_weighted_average(), and get_eao().
get_cog() should be more memory efficient and bias
correction is now enabled for get_eao() and
get_weighted_average(). These all now work with subsets of
the full set of fitted time elements as get_index() has for
a while.
Optimize memory usage and speed of
get_range_edge().
Remove extraDistr import to avoid CRAN warning.
Switch from lme4 to reformulas package
for random effects parsing functions (findbars(),
nobars(), subbars(), mkReTrms()).
The lme4 maintainers moved these formula utilities to the
separate reformulas package.
Fix predict() with se_fit = TRUE for
delta models to correctly return standard errors on combined predictions
when model = NA. Previously, standard errors were only
calculated for the first component (est1) instead of the
combined estimate (est). #496
Fix typo in predict() for delta models that
incorrectly calculated combined predictions as p1 * p1
instead of p1 * p2 in the specific case of
re_form = NA and type = "link". #496
Dramatically improve print() performance for models
with large embedded objects in calls (e.g., cross-validation scenarios
with replicated data). The fix avoids expensive deparse()
operations on large data frames and mesh objects by extracting only the
argument names needed for display. #492
Fix error when parsing model when including
extra_time in delta-family models with a list formula.
#493
sdmTMB_cv() now supports the weights
argument. User-supplied weights are combined with the internal
fold-assignment mechanism (held-out data are assigned weight 0). Weights
must be positive (> 0). #486
Add experimental collapse_spatial_variance option to
sdmTMBcontrol() to automatically detect and turn off
spatial and/or spatiotemporal random fields when their SD parameters are
estimated to be very small (below a threshold). When enabled, the model
will automatically refit with the appropriate fields turned off if SD
parameters fall below collapse_threshold (default 0.01).
This can help avoid boundary issues and improve model stability when
random fields are not needed. Set to FALSE by default.
#263
Add new experimental function get_range_edge() to
calculate range edges as density-weighted quantiles along a spatial axis
(e.g., latitude, coastal distance). Range edges are calculated as
positions where cumulative density equals specified quantiles. Uses
linear interpolation for accurate quantile estimation and simulation
from the joint precision matrix for uncertainty quantification.
Implements a similar approach to VAST range edge calculations following
Fredston et al. (2021) https://doi.org/10.1111/gcb.15614. See the new range
edge vignette at https://sdmTMB.github.io/sdmTMB/articles/
The Student-t degrees of freedom parameter is now estimated by
default in student(). Previously it was fixed at 3. To fix
it at a specific value, set df to a numeric value (e.g.,
student(df = 3)). To estimate it (new default), set
df = NULL or omit the argument. The parameter is
constrained to be > 1. The function now prints an informative message
about the df parameter behavior.
Add deviance residuals for left-out data in the cross validation
output. This can be used to calculate deviance explained of left-out
data. See cv_deviance_resid column in the data
element of the output of sdmTMB_cv().
Add save_models argument to sdmTMB_cv()
(defaults to TRUE). Setting
save_models = FALSE prevents storing fitted model objects
for each fold, which can substantially reduce memory usage for large
datasets or many folds. When FALSE, functions requiring
model access (tidy(), cv_to_waywiser()) will
error with informative messages. Essential CV metrics (predictions, log
likelihoods, deviance residuals, convergence info) remain
available.
Extend sdmTMB_simulate() to support time-varying
effects with vector sigma_V inputs and AR1 correlation
(rho_time). #447
Add new function cv_to_waywiser() to convert
cross-validation results to sf format for use with the waywiser package.
This enables multi-scale spatial assessment of model predictions.
#193
Add vignette demonstrating how to fit zero-one-inflated beta (ZOIB) models by fitting three separate model components and combining predictions. #440 #441
Add argument to fix probability of extreme events for
*_mix() families. Note that the internal parameter name has
also changed from p_mix to p_extreme and from
logit_p_mix to logit_p_extreme. #318
#474
Add beta-binomial family (betabinomial()) for
modeling overdispersed binomial data. Supports logit and cloglog links,
and includes proper residuals support.
Add new function get_weighted_average() to calculate
biomass-weighted averages of user-supplied vectors (e.g., depth,
temperature). This function follows the same pattern as
get_cog() but allows users to specify any variable for
weighted averaging. Supports bias correction and area
weighting.
Add vignette on age (or length) composition standardization. To
help with this add a new experimental function
make_category_svc().
Add emmeans support for delta/hurdle models. Use
model = 1 for the binomial component or
model = 2 for the positive component when calling
emmeans(). Example:
emmeans(fit, ~ predictor, model = 2). #247 #249
Fix barrier model implementation. The SPDE input matrices for the barrier model from INLA and INLAspacetime had changed. sdmTMB now appropriately uses these new matrices and unit tests in sdmTMBextra should catch such a change in the future. #457
Fix Student-t deviance residuals, which were incorrectly
returning NaNs.
Fix sign() utility function to avoid
NaN when x = 0. Now returns standard
mathematical sign function behavior: sign(0) = 0.
Fix bug in sdmTMB_cv() automatic fold generation
that could result in unbalanced folds with duplicate and missing fold
IDs. The bug was most severe with large k_folds values
(e.g., leave-one-out cross-validation with
k_folds = nrow(data)), which could cause errors when folds
had no data. User-supplied fold_ids were not
affected.
Add check if newdata has been filtered after prediction and
before passing to a get_*() function.
Fix tidy() to only include the model
column for delta models. For non-delta models, the model
column is no longer included in the output for
effects = "ran_pars" and effects = "ran_vals",
making the output cleaner and more consistent.
Update package logo.
Add residuals for truncated negative binomial families. #481 Thanks to @Joseph-Barss
Fix an issue with residuals for delta models by consistently
using get_par(), and another issue specifically for delta
truncated negative binomial models by replacing NaN with NA.
#484
Fix tidy() with effects = "ran_pars" to
report min/max anisotropic ranges (e.g., range_min,
range_max) for models fit with
anisotropy = TRUE, matching the values shown in
print_anisotropy(). Standard errors and confidence
intervals are set to NA since uncertainty in both the range parameter
and H matrix cannot be easily propagated.
Fix issue with ggeffects with multiple smoothers + offsets. #450
Improve t2() printing and appearance in
tidy.sdmTMB(). #415 #472
Fix emmeans support for models with smoothers
(s() terms). Previously, emmeans would fail
with “Non-conformable elements in reference grid” when smoothers were
included in the model formula.
Let simulate.sdmTMB() work with binomial GLMs with
size specified via weights and newdata
supplied. #465
Fix issue with fold logic in LFO (leave-future-out) cross
validation for lfo_forecast > 1. #454 Thanks to @Joseph-Barss.
Add update.sdmTMB() so that the mesh argument
doesn’t have to be specified if model is loaded in a fresh session.
#461
Change default in get_index() etc. to
bias_correct = TRUE. This is the recommended setting for
final inference and speed improvements within TMB have made it more
viable to include the bias correction by default. #456
Only retain Newton update parameters if they improve the objective function. #455
Only run Newton updates if maximum absolute gradient is
>= 1e-9 to save time. #455
Suppress nlminb() warnings by default, which can
usually be ignored by the user and may be confusing. This can be
controlled via
sdmTMB(..., control = sdmTMBcontrol(suppress_nlminb_warnings = FALSE)).
This option now mirrors tinyVAST.
Round time-varying AR(1) rho to 2 decimals in model printing/summary.
Add deviance residuals
(residuals(fit, type = "deviance")) and
deviance.sdmTMB() method (deviance(fit)).
Proportion deviance explained can be calculated as
1 - deviance(fit) / deviance(fit_null) where
fit_null is a null model, e.g., fit with
formula = ~ 1 and turning off any random fields as desired
(e.g., spatial = "off", spatiotemporal = "off").
Add observation_error argument to
simulate.sdmTMB() to allow turning off observation error
simulation. The intended use-case is for simulating from random effects
but not adding observation error. #431
Change the default in dharma_residuals() to
test_uniformity = FALSE. Based on simulation testing, we
generally do not recommend using these p-values to reject
models.
Fix a bug introduced in version 0.7.0 where printing of the 2nd
linear predictor smoother fixed effects (bs) was
accidentally a copy of the 1st linear predictor smoother fixed
effects.
Fix bug in simulation with time-varying AR(1) when using the
project() function. Thanks to A. Allyn for pointing out the
bug.
Fix reporting of converged models with sdmTMB_cv().
A recent change resulted in reporting only 1 model converged if all
models converged.
Remove warning about old default residuals type.
Fix project() and
simulate.sdmTMB(..., newdata = ...) when random
intercepts/slopes are present. #431
Remove extra TMB data slots for project() and
simulate.sdmTMB(..., newdata = ...) to save memory.
#431
Add option for random slopes, or random intercepts to be passed
in in lme4 style formulas,
density ~ (1 | fyear) or
density ~ (depth | fyear), Matches output of
lme4 and glmmTMB, and summarizes output with
tidy().
Add project() experimental function.
Add get_eao() to calculate effective area
occupied.
Allow predicting on new data with t2() smoothers.
#413
Add priors for breakpt() and logistic()
parameters. #403
Add priors on time-varying SD parameters
(sigma_V).
Add cAIC() for calculating conditional AIC.
Theory based on https://arxiv.org/abs/2411.14185; also see https://doi.org/10.1002/ecy.4327. J.T. Thorson wrote the
function code. EDF (effective degrees of freedom) will ultimately be
further split (e.g., split by smoothers) and added to
summary.sdmTMB(). #383 #387
Add EDF (effective degrees of freedom) printing to smoothers with
print.sdmTMB() and summary.sdmTMB(). Set
argument edf = TRUE. E.g.
print(fit, edf = TRUE). #383 #387
At experimental function get_index_split(), which
takes care of splitting a prediction grid by time, undoing the
prediction and area-integration index calculations for each chunk to
save memory.
Add newdata argument to
simulate.sdmTMB(). This enables simulating on a new data
frame similar to how one would predict on new data.
Add mle_mvn_samples argument to
simulate.sdmTMB(). Defaults to “single”. If “multiple”,
then a sample from the random effects is taken for each simulation
iteration.
Allow for specifying only lower or upper limits. #394
sdmTMB_cv() gains a tidy() and
print() method for output. #319
simulate.sdmTMB() method now has an
return_tmb_report argument.
Add forecasting and presence-only article vignettes. See https://sdmTMB.github.io/sdmTMB/articles/
Add vignette on multispecies models with sdmTMB (or any case where one wants additional spatial and or spatiotemporal fields by some group). See https://sdmTMB.github.io/sdmTMB/articles/
Add a useful error if memory error occurs on index calculation.
Fix bug in a check in make_mesh() around if
coordinates look overly large. #427
Re-enable bias correction for get_cog() (get center
of gravity).
Add check for Inf/-Inf values before
fitting. #408
Add linear component of smoothers to tidy().
#90
Add time varying AR(1) correlation to tidy() and
print(). #374
Warn if parameter limits are set with
newton_loops > 0. #394
Fix bug in est column when predicting on new data
with Poisson-link delta models with type = "link" and
re_form = NA. #389
Fix bug in s95 parameter reporting from the
tidy() method. s95 is present in the logistic
threshold models. The model itself was fine but the s95
parameter was supposed to be reported by tidy() as a
combination of two other parameters. This also affected the output in
print()/summary().
Add progress bar to simulate.sdmTMB(). #346
Add AUC and TSS examples to cross validation vignette. #268
Add model (linear predictor number) argument to
coef() method. Also, write documentation for
?coef.sdmTMB. #351
Add helpful error message if some coordinates in
make_mesh() are NA. #365
Add informative message if fitting with an offset but predicting
with offset argument left at NULL on newdata.
#372
Fix passing of offset argument through in
sdmTMB_cv(). Before it was being omitted in the prediction
(i.e., set to 0). #372
Fig bug in exponentiate argument for
tidy(). Set conf.int = TRUE as default.
#353
Fix bug in prediction from delta_truncated_nbinom1()
and delta_truncated_nbinom2() families. The positive
component needs to be transformed to represent the mean of the
untruncated distribution first before multiplying by the
probability of a non-zero. Thanks to @tom-peatman #350
Add option for area to be passed in as the name of a
column in the data frame to be used for area weighting. Used in
get_index(), get_cog(),
get_eao(), etc.
Pass several arguments to
DHARMa::plotQQunif().
Add silent option in simulate.sdmTMB().
Setting it to FALSE allows monitoring simulations from
larger models.
Fix bug in est_non_rf1 and est_non_rf2
columns when all the following conditions were true:
Fix delta-gamma binomial link printing for
type = 'poisson-link' #340
Add suggestion to use an optimized BLAS library to README.
Add warning if it’s detected that there were problems reloading
(e.g., with readRDS()) a fitted model. Simultaneously
revert the approach to how reloaded models are reattached.
Move log_ratio_mix parameter to 2nd phase with
starting value of -1 instead of 0 to improve convergence.
Fix bugs for nbinom1() and
nbinom2_mix() simulation.
Allow profile argument in the control list to take a
character vector of parameters. This move these parameters from the
outer optimization problem to the inner problem (but omits from the from
the Laplace approximation). See documentation in TMB. This can
considerably speed up fitting models with many fixed effects.
Add theoretical quantile residuals for the generalized gamma distribution. Thanks to J.C. Dunic. #333
Add "poisson-link" option to delta-mixture
lognormal.
Fix bug in simulation from Poisson-link delta models.
Simplify the internal treatment of extra time slices
(extra_time). #329 This is much less bug prone and also
fixes a recently introduced bug. #335 This can slightly affect model
results compared to the previous approach if extra time was used along
with smoothers since the ‘fake’ extra data previously used was included
when mgcv determined knot locations for smoothers.
Overhaul residuals vignette (‘article’) https://sdmTMB.github.io/sdmTMB/articles/residual-checking.html including brief intros to randomized quantile residuals, simulation-based residuals, ‘one-sample’ residuals, and uniform vs. Gaussian residuals.
Add check if prediction coordinates appear outside of fitted coordinates. #285
Fix memory issue with Tweedie family on large datasets. #302
Add experimental option to return standard normal residuals from
dharma_residuals().
Make simulate.sdmTMB() not include
extra_time elements.
Improved re-initialization of saved fitted model objects in new sessions.
Fix important bug in simulate.sdmTMB() method for
delta families where the positive linear predictor was only getting
simulated for observations present in the fitted data.
Add new "mle-mvn" type to
residuals.sdmTMB() and make it the default. This is a fast
option for evaluating goodness of fit that should be better than the
previous default. See the details section in
?residuals.sdmTMB for details. The previous default is now
called "mvn-eb" but is not recommended.
Bring dharma_residuals() back over from sdmTMBextra
to sdmTMB. Add a new option in the type argument
("mle-mvn") that should make the simulation residuals
consistent with the expected distribution. See the same new
documentation in ?residuals.sdmTMB. The examples in
?dharma_residuals illustrate suggested use.
Fix bug in sanity() where gradient checks were
missing abs() such that large negative gradients weren’t
getting caught. #324
Return offset vector in fitted object as an element.
Ensure any extra time rows of data in the data element of
the fitted object do not include the extra time slices.
Add experimental residuals option “mle-mvn” where a single approximate posterior sample of the random effects is drawn and these are combined with the MLE fixed effects to produce residuals. This may become the default option.
Add the generalized gamma distribution (thanks to J.T. Thorson
with additional work by J.C. Dunic.) See gengamma(). This
distribution is still in a testing phase and is not recommended for
applied use yet. #286
Detect possible issue with factor(time) in formula if same column
name is used for time and extra_time is
specified. #320
Improve sanity() check output when there are NA
fixed effect standard errors.
Set intern = FALSE within index bias correction,
which seems to be considerably faster when testing with most
models.
Fix a bug likely introduced in July 2023 that caused issues when
extra_time was specified. This is an important bug and
models fit with extra_time between that date (if using the
GitHub version) and v0.4.2.9004 (2024-02-24) should be checked against a
current version of sdmTMB (v0.4.2.9005 or greater). On CRAN, this
affected v0.4.0 (2023-10-20) to v0.4.2. Details:
extra_time works by
padding the data with a fake row of data for every extra time element
(using the first row of data as the template). This is supposed to then
be omitted from the likelihood so it has no impact on model fitting
beyond spacing time-series processes appropriately and setting up
internal structures for forecasting. Unfortunately, a bug was introduced
that caused these fake data (1 per extra time element) to be included in
the likelihood.Issue error if time column has NAs. #298
#299
Fix bug in get_cog(..., format = "wide") where the
time column was hardcoded to "year" by accident.
Poisson-link delta models now use a type argument in
delta_gamma() and delta_lognormal().
delta_poisson_link_gamma() and
delta_poisson_link_lognormal() are deprecated.
#290
Delta families can now pass links that are different from the
default "logit" and "log". #290
Force rebuild of CRAN binaries to fix issue with breaking Matrix
ABI change causing NaN gradient errors. #288 #287
Fix crash in if sdmTMB(..., do_index = TRUE) and
extra_time supplied along with
predict_args = list(newdata = ...) that lacked
extra_time elements.
Allow get_index() to work with missing time
elements.
Add the ability to pass a custom randomized quantile function
qres_func to residuals.sdmTMB().
Add check for factor random intercept columns in
newdata to avoid a crash. #278 #280
Improve warnings/errors around use of
do_index = TRUE and get_index() if
newdata = NULL. #276
Fix prediction with offset when newdata
is NULL but offset is specified. #274
Fix prediction failure when both offset and
nsim are provided and model includes
extra_time. #273
Fix memory issues detected by CRAN ‘Additional issues’ clang-UBSAN, valgrind.
Fix a bug predicting on new data with a specified offset and
extra_time. #270
Add warning around non-factor handling of the
spatial_varying formula. #269
Add experimental set_delta_model() for plotting
delta models with ggeffects::ggpredict() (GitHub version
only until next CRAN version).
Move add_barrier_mesh() to sdmTMBextra to avoid final INLA dependency. https://github.com/sdmTMB/sdmTMBextra
Switch to using the new fmesher package for all mesh/SPDE calculations. INLA is no longer a dependency.
Switch to diagonal.penalty = FALSE in
mgcv::smoothCon(). This changes the scale of the linear component of the
smoother, but should result in the same model.
https://github.com/glmmTMB/glmmTMB/issues/928#issuecomment-1642862066
Implement cross validation for delta models #239
Remove ELPD from cross validation output. Use sum_loglik instead. #235
Turn on Newton optimization by default. #182
print() now checks sanity() and issues a warning if there may be issues. #176
Poisson-link delta models and censored likelihood distributions have been made considerably more robust. #186
Standard errors are now available on SD parameters etc. in tidy() #240
Fix bug in print()/tidy() for delta-model positive model component sigma_E. A recently introduce bug was causing sigma_E for the 2nd model to be reported as the 1st model component sigma_E.
Add new anisotropy plotting function.
Add anisotropic range printing. #149 by @jdunic
Create the sdmTMBextra package to remove rstan/tmbstan helpers, which were causing memory sanitizer errors on CRAN. https://github.com/sdmTMB/sdmTMBextra
The following functions are affected:
predict.sdmTMB() now takes mcmc_samples,
which is output from sdmTMBextra::extract_mcmc().simulate.sdmTMB() now takes mcmc_samples,
which is output from sdmTMBextra::extract_mcmc().residuals.sdmTMB() now takes mcmc_samples,
which is output sdmTMBextra::predict_mle_mcmc(). This only
affects residuals(..., type = "mle-mcmc").Move dharma_residuals() to sdmTMBextra to reduce
heavy dependencies.
See examples in the Bayesian and residuals vignettes or in the help files for those functions within sdmTMBextra.
Various fixes to pass CRAN checks. #158
Fix memory issue highlighted by Additional issues CRAN checks. #158
‘offset’ argument can now be a character value indicating a column name. This is the preferred way of using an offset with parallel cross validation. #165
Fix parallel cross validation when using an offset vector. #165
Add leave-future-out cross validation functionality. #156
Example data qcs_grid is no longer replicated by
year to save package space. #158
Add message with tidy(fit, "ran_pars") about why SEs
are NA.
Add anisotropy to print() #157
Fix predict(..., type = "response", se_fit = TRUE),
which involves issuing a warning and sticking to link space.
#140
Relax range parameter sanity() check from 1x to 1.5x
the greatest distance in the data.
Add Pearson residuals for several families.
residuals(fit, type = "pearson") Useful for checking for
overdispersion with N > 1 binomial or Poisson families, among other
uses. See the overdisp_fun() function at:
https://bbolker.github.io/mixedmodels-misc/glmmFAQ.html#testing-for-overdispersioncomputing-overdispersion-factor
Fix bug when using residuals() or
simulate() with binomial families specified via
cbind() or weights = N. The binomial sample
size wasn’t being passed through typically resulting in
Inf/-Inf.
Add mixture families: gamma_mix(),
lognormal_mix() and associated delta/hurdle families:
delta_gamma_mix(), delta_lognormal_mix().
These families feature a mixture of two distributions with different
means but shared variance parameters.
Add delta_beta() family.
Tweak sanity() checking of standard error
size.
Export previously experimental plot_anisotropy()
function. The old function is now
plot_anisotropy2().
Allow passing offset data through predict.sdmTMB()
via offset argument.
Switch effects = 'ran_vals' for random intercept
values from tidy.sdmTMB() to match the broom.mixed
package.
Make tidy.sdmTMB() return a tibble if the tibble
package is installed. Note this could affect old code since
drop = FALSE is the default for tibbles but
drop = TRUE is the default for data frames (i.e., tibbles
always return a data frame when subsetted).
Fix longstanding issue with predicting on newdata with mgcv’s
t2(). Previously this was disabled because of issues. It
now works as expected.
Add knots argument in sdmTMB(), which
is passed to mgcv. A common use would be to specify end points in a
cyclical spline (e.g.,
s(x, bs = 'cc', k = 4), knots = list(x = c(1, 3, 5, 7)))
when the data don’t extend fully to the boundaries that should match
up.
Preparing for release on CRAN.
Add time-varying AR1 option (originally was always a random
walk). See time_varying_type argument in
?sdmTMB.
Allow prediction on newdata with missing time
elements. #130
Add check for offset() (which does not work
in sdmTMB, use the offset argument instead). #131
Add check for random slopes (sdmTMB currently only does random intercepts, although slopes can vary spatially). #131
ADREPORT several parameters in natural space. https://github.com/sdmTMB/sdmTMB/discussions/113
Improve robustness of model print() to more esoteric
mgcv smoothers.
Let sims_var work with multiple spatially varying
slopes (zeta_s); return output in named list by
coefficients. #107
Add threshold_coefs to
sdmTMB_simulate().
Don’t make a fake mesh for non-spatial model (faster).
Add vignettes on visreg, ggeffects, and delta families (thanks J. Indivero!) #83 #87 #89 Forecasting and presence-only vignettes to be merged in soon.
Add support for emmeans package. See ?emmeans.sdmTMB
for examples.
Add support for effects package. The
ggeffects::ggeffect() function can be used to make fast
marginal effects plots. ggeffects::ggpredict() works with a
custom fork of ggeffects. A pull request will be made shortly.
#101
Add vcov(), fixef(),
df.residual(), formula(),
terms(), and model.frame() methods.
Add support for "cloglog" link. Code adapted from
glmmTMB for robust likelihood implementation.
For delta models, by default share the anisotropy parameters as
in VAST. Separate anisotropy (old behavior) can be estimated with
control = sdmTMBcontrol(map = list(ln_H_input = factor(c(1, 2, 3, 4))))
Add experimental do_index,
predict_args, and index_args in
sdmTMB(). These can be used to perform prediction and index
calculation at the same time as fitting. For very large datasets or
meshes this can save time compared to fitting, predicting, and index
calculation in 3 separate steps since the TMB AD object doesn’t have to
be rebuilt. This will somewhat slow down the initial fitting.
Remove max_gradient and bad_eig from
get_index() output.
Use unique locations on prediction for huge speedups on large
newdata gridded data.
Fix bug where in rare cases get_index() would return
gibberish small values.
Add bayesian argument, which when TRUE
adds Jacobian adjustments for non-linear transformed parameters. This
should be TRUE if the model will be passed to tmbstan, but
FALSE otherwise. #95
Add experimental and not-yet-exported
sdmTMB:::plot_anisotropy2().
Add many anisotropy, delta model, and index calculation unit tests.
Enable random walk random field TMB simulation in
sdmTMB_simulate().
Add check for irregular time with AR1 or random walk processes.
Fix bugs introduced by delta model code (offsets with
extra_time and threshold model prediction).
Fix bug in sanity() message with small random field
SDs.
Add support for ‘delta’ (or ‘hurdle’) models. See examples and
documentation in ?sdmTMB. This has resulted in a
substantial restructuring of the internal model code. By default both
model components (e.g., binomial & Gamma) share the same formula,
spatial, and spatiotemporal structure, but these can be separated by
supplying argument values in lists where the first element corresponds
to the first model and the second element corresponds to the second
model (with some limitations as described in ?sdmTMB
documentation ‘Details’).
Add support for multiple spatially varying coefficients (used to be limited to a single variable).
Add compatibility with the ‘visreg’ package for visualizing
conditional effects of parameters. See ?visreg_delta for
examples.
Add MCMC residual type to residuals.sdmTMB(). These
are a ‘better’ residuals but slower to calculate. See documentation
‘Details’ in ?residuals.sdmTMB.
Make offset an argument in sdmTMB().
Using the reserved word offset in the formula is now
deprecated.
Add sanity() function to perform some basic sanity
checks on model fits.
Make an sdmTMB() model object compatible with
update() method.
Remove several deprecated arguments.
Overhaul examples in ?sdmTMB.
Use faster “low-rank sparse hessian bias-correction” TMB bias correction.
Add parallel processing support. See parallel
argument in sdmTMBcontrol. By default, grabs value of
sdmTMB.cores option. E.g.
options(sdmTMB.cores = 4). Only currently enabled on
Mac/Linux. Using too many cores can be much slower than 1 core.
Use ‘cli’ package
cli_abort()/cli_warn()/cli_inform()
over
stop()/warning()/message().
Add many unit tests.
poly(..., raw = FALSE) on
newdata. #77Add experimental sdmTMB_stacking() for ensemble
model stacking weights.
Add fake mesh if random fields are all off. #59
Make predict(..., newdata = NULL) also use
last.par.best instead of last.par to match
newdata = df.
Fix bug in MVN fixed-effect prior indexing
sims and n_sims arguments have been
deprecated and standardized to nsim to match the
simulate() S3 method.
Bias correction on get_index() and
get_cog() is now selective and is just applied to the
necessary derived parameters.
INLA projection matrix ‘A’ is now shared across spatial and spatiotemporal fields.
Add add_utm_columns() to ease adding UTM
columns.
Add dharma_residuals().
Fix bug in simulate.sdmTMB() and
residuals.sdmTMB() for binomial family.
Smoothers now appear in print() output. The format
should roughly match brms. The main-effect component (e.g.,
sdepth for s(depth)) represents the linear
component and the random effect (e.g., sds(depth))
component in the output corresponds to the standard deviation of the
penalized weights.
Add censored_poisson(link = 'log') family;
implemented by @joenomiddlename
fields in sdmTMB() is now deprecated
and replaced by spatiotemporal.
include_spatial in sdmTMB() is now
deprecated and replaced by spatial.
spatial_only in sdmTMB() is now
deprecated and replaced by spatiotemporal. E.g.
spatial_only = TRUE is now
spatiotemporal = 'off' or leaving
time = NULL.
spde in sdmTMB() is now deprecated and
replaced by mesh.
sdmTMB_simulate() is new and will likely replace
sdmTMB_sim() eventually. sdmTMB_simulate() is
set up to take a formula and a data frame and is easier to use if you
want different spatial observations (and covariates) for each time
slice. It can also take a fitted model and modify parts of it to
simulate. Finally, this function uses TMB for simulation and so is much
faster and more flexible in what it can simulate (e.g., anisotropy) than
the previous version.
spatial_trend is now spatial_varying
and accepts a one-sided formula with a single predictor of any
coefficient that should varying in space as a random field. Note that
you may want to include a fixed effect for the same variable to improve
interpretability. If the (scaled) time column is used, it will represent
a local-time-trend model as before.
The Tweedie power (p) parameter is now in print()
and tidy() output.
thetaf is now tweedie_p in
sdmTMB_sim().
se_fit = TRUE for
breakpoint models.s() are now penalized smoothers:
they determine the degree of wiggliness (as in mgcv) and it is no longer
necessary to choose an appropriate k value a priori. Models
fit with previous versions of sdmTMB with s(x, k = ...)
will not match models specified the same way in version >= 0.0.19
since the basis functions are now penalized. All the various
mgcv::s() options should be supported but t2()
(and ti() and te()) are not supported.Add ELPD (expected log predictive density) to
sdmTMB_cv() https://arxiv.org/abs/1507.04544
Fix bug evaluating ... when sdmTMB_cv()
was called within a function. #54
Add random walk option: fields = "RW".
Depreciate ar1_fields argument. See new
fields argument in `sdmTMB().
Many packages moved from ‘Imports’ to ‘Suggests’
Lower default nlminb() eval.max and
iter.max to 1000 and 2000.
Added profile option in
sdmTMBcontrol(). This can dramatically improve model
fitting speed with many fixed effects. Note the result is likely to be
slightly different with TRUE
vs. FALSE.
Added simulation from the MVN precision matrix to
predict.sdmTMB(). See the sims
argument.
Added gather_sims() and spread_sims()
to extract parameter simulations from the joint precision matrix in a
format that matches the tidybayes package.
Added get_index_sims() for a population index
calculated from the MVN simulation draws.
Added extract_mcmc() to extract MCMC samples if the
model is passed to tmbstan.
Added the ability to predict from a model fitted with tmbstan.
See the tmbstan_model argument in
predict.sdmTMB().
Allowed for separate random field Matern range parameters for
spatial and spatiotemporal fields. E.g.
sdmTMB(shared_range = FALSE)
Bounded the AR1 rho parameter between -0.999 and 0.999 to improve convergence; was -1 to 1. Please post an issue if this creates problems for your model.
Added map, start, lower,
and upper options to control model fitting. See
sdmTMBcontrol().
Added priors for all parameters. See ?sdmTMB::priors
and the priors argument in sdmTMB(). PC priors
are available for the random fields. See ?pc_matern and the
details there.
Moved many less-common arguments from sdmTMB() to
sdmTMBcontrol().
Fix bug in sdmTMB_cv() where fitting and testing
data splits were reversed. I.e., the small chunk was fit; the big chunk
was tested.
Added experimental penalized complexity (PC) prior as used in
INLA. See arguments matern_prior_O and
matern_prior_E.
Added back normalize argument to
sdmTMB() and default to FALSE. Setting to
TRUE can dramatically speed up some model fits (~4 times
for some test models).
Add re_form_iid to
predict.sdmTMB().
Add map_rf option to sdmTMB(). This
lets you map (fix at their starting values of zero) all random fields to
produce a classic GLM/GLMM.
... + (1 | g)
#34epsilon_predictor argument in sdmTMB()
to allow a model of the spatiotemporal variance through time.penalties argument to allow for
regularization.Fixed parameter initialization for inverse links #35
Switched Gamma ‘phi’ parameter to representing shape instead of CV to match glm(), glmmTMB(), etc.
get_generic() function can be used to grab things like
standardized average values of the response across a grid. What used to
be log_total in the raw TMB output is now
link_total but most users you shouldn’t notice any
difference.Overhauled the simulation function. The function is now called
sdmTMB_sim() and uses INLA functions instead of
RandomFields functions for simulating the random fields.
The simulation function can now accommodate all families and links and takes an INLA mesh as input.
Added a tidy() method (from broom and broom.mixed)
to return a data frame of parameter estimates. The function can extract
the fixed effects or the random effect parameters (variances, AR1
correlation, spatial range).
Added an argument extra_time to
sdmTMB(). This introduces additional time slices that you
can then predict on if you want to interpolate or forecast. Internally,
it uses Eric Ward’s ‘weights hack’. This is also useful if you have data
unevenly spaced in time and you want the gaps evenly spaced for a random
walk or AR1 process (add any missing years to
extra_time).
make_spde() is now replaced with
make_mesh() and make_spde() has been soft
deprecated. make_mesh() carries through the x and y column
names to the predict function and is more in line with the tidyverse
style of taking a data frame first.
make_mesh() can accept cutoff as an
argument (as in INLA), which is likely a better default way to specify
the mesh since it scales across regions better and is line with the
literature on INLA.
make_mesh() can use a binary search algorithm to
find a cutoff that best matches a desired number of knots (thanks to
Kelli Johnson for the idea).
Barrier meshes are now possible. See
add_barrier_mesh() for an example.
There is a pkgdown website now that gets auto generated with GitHub actions.
There is the start of a model description vignette. It is very much a work in progress.
Fixed bug with predictions on new data in models with break points
Overhauled cross validation function. The function now:
Added threshold parameters to the print method
Added forecasting example with the weights hack
Fixed bug in linear break point models
Fixed GAM predictions with all 0s in new data.
Add linear and logistic threshold models. #17
Added parsing of mgcv formulas for splines. #16
Added ability to predict with standard errors at the population level. This helps with making marginal-effect plots. #15
Added optimization options to aid convergence. Also added
run_extra_optimization() to run these on already fit
models. Default is for no extra optimization.
Added binomial likelihood to cross validation. Git hash
ee3f3ba.
Started keeping track of news in NEWS.md.
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