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