fista.cpp and fista_cox.cpp now have internal
linkage (anonymous namespaces).coef() now returns a one-column sparse
matrix instead of a two-column data frame. Zero coefficients
are printed as ., which keeps the display compact in high
dimensions.
Added a summary() method for pic
fits.
intercept = FALSE is now permitted for every family.
Previously it raised an error for non-Cox families when
standardize = TRUE. When intercept = FALSE,
the data are assumed to be centered.
Standardized the input-validation error messages (consistent
back-quoting of argument names and call. = FALSE).