making a vignette optional
On Tue, 18 Jun 2019 at 19:03, Therneau, Terry M., Ph.D. via R-devel
<r-devel at r-project.org> wrote:
I had added a vignette to the coxme package and all worked well locally, but it failed at CRAN. The issue is that the vignette involves using coxme for pedigree data, it doesn't work without the kinship2 package, and I hadn't put in the necessary "if (require(...." logic. The question is, how do I make the entire vignette conditional? If the package isn't available, there is nothing to run. The latex itself will fail when it can't find the figures (I float them), and the parts that don't will end up as inane discussion of material that isn't there.
This is what I do in my packages: https://github.com/r-simmer/simmer/blob/master/vignettes/simmer-08-philosophers.Rmd#L21 If SweaveOpts accept code in the same way, you can set something like \SweaveOpts{eval=requireNamespace("kinship2", quietly=TRUE)} I?aki