fddm v1.0-2 (Release date: 2024-06-26)

New Features

• added function ddm() which permits formula-based fitting of the DDM using the analytic gradient.

Other Changes

• the order of the arguments v and a to functions dfddm(), pfddm(), and the PDF derivatives d*_ddm() were changed. Previously, it was ...ddm(..., a, v, ...), and now it is ...ddm(..., v, a, ...)
• character variables in med_dec transformed to factors.
• updated example vignette by showing how to use the new ddm() function.

fddm v0.5-1 (Release date: 2022-3-15)

New Features

• Added new method to compute the PDF of the DDM

Bug Fixes

• Fixed HTML deprecation in documentation

Other Changes

• Changed the function parameters in dfddm() that determine how the method of calculation is chosen.

fddm v0.4-1 (Release date: 2021-12-10)

Bug Fixes

• Fixed ‘pi’ issue with Rcpp

fddm v0.4-0 (Release date: 2021-7-27)

New Features

• Added the function pfddm() to calculate the cumulative distribution function (CDF) of the DDM; it uses the same model parameters as the existing dfddm() function.

Bug Fixes

• Fixed issue where the log optional parameter was ignored and the non-log result was produced.

fddm v0.3-3 (Release date: 2021-4-4)

Bug Fixes

• Fixed issue on Solaris involving floor function and the int data type.
• Revamped handling of model parameters whose values are out-of-bounds.

fddm v0.3-1 (Release date: 2021-3-21)

New Features

• Added new parameter sigma to denote the diffusion coefficient of the Wiener process that underlies the DDM.

Bug Fixes

• Corrected the required number of terms in the small-time approximation methods.
• k now consistently refers to the number of individual terms instead of sometimes the number of pairs of terms.

Other Changes

• Changed default value of max_terms_large to 1. This affects the default method (n_terms_small = "SWSE", scale = "both").
• Revamped the error handling to make it less intrusive.
• Removed function call in R; now directly calls C++.
• Updated vignettes.

fddm v0.2-2 (Release date: 2020-11-03)

Other Changes

• Added warning about old 32-bit compilers exhibiting abnormal behavior for the large-time approximation.

fddm v0.2-1 (Release date: 2020-10-09)

Bug Fixes

• The num_funcs.cpp functions are now prevented from possible overflow.
• Checks are now in place for empty strings as inputs to the parameters n_terms_small, summation_small, and scale.

fddm v0.1-2 (Release date: 2020-10-07)

New Features

• New default method, callable using the arguments n_terms_small = "SWSE", scale = "both".

Bug Fixes

• Density functions now return strictly non-negative values.

Other Changes

• If input response times is an empty vector, then an empty vector is returned.
• Fine-tuned the summation functions used with the SWSE method
• Added URLs to DESCRIPTION

fddm v0.1-1 (Release date: 2020-07-10)

Initial CRAN release.