[R] How to build a package which loads Rgraphviz (if installed)...

Duncan Murdoch murdoch at stats.uwo.ca
Sun Jul 13 00:36:17 CEST 2008

On 12/07/2008 6:27 PM, Søren Højsgaard wrote:
> Bill,
> Thanks for the suggestion, but it does not solve the problem; I get the same warning from rcmd check. I suspect that rcmd check actually checks that any package referred to in require() is declared in the DESCRIPTION file. From the version numbers from your 'psych' package I guess you are stuck with the same problem???

There are varying degrees of dependence.  Probably "Suggests" is what 
you want.

Note that *you* need to have RGraphViz to make it through the checks, 
but other users won't need it.

Duncan Murdoch

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