gratia now uses the mvnfast package for random draws from a multivariate normal distribution (mvnfast::rmvn()). Contributed by Henrik Singmann (@singmann) #28
New function basis() for generating tidy representations of basis expansions from an mgcv-like definition of a smooth, e.g. s(), te(), ti(), or t2(). The basic smooth types also have a simple draw() method for plotting the basis. basis() is a simple wrapper around mgcv::smoothCon() with some post processing of the basis model matrix into a tidy format. #42
New function smooth_samples() to draw samples of entire smooth functions from their posterior distribution. Also has a draw() method for plotting the posterior samples.
draw.gam() would produce empty plots between the panels for the parametric terms if there were 2 or more parametric terms in a model. Reported by @sklayn #39.
derivatives() now works with factor by smooths, including ordered factor by smooths. The function also now works correctly for complex models with multiple covariates/smooths. #47
derivatives() also now handles 'fs' smooths. Reported by @tomand-uio #57.
evaluate_parametric_term() and hence draw.gam() would fail on a ziplss() model because i) gratia didn’t handle parametric terms in models with multiple linear predictors correctly, and ii) gratia didn’t convert to the naming convention of mgcv for terms in higher linear predictors. Reported by @pboesu #45.