On 11/03/2019 9:53 a.m., Elias Carvalho wrote:
I am developing my first package and found these errors when checking it.
Any help?
* checking dependencies in R code ... WARNING
'library' or 'require' calls not declared from:
‘qgraph’ ‘semPlot’ ‘sna’ ‘xlsx’
Without seeing your package I might be wrong, but I believe this says
that you have something like
library(qgraph)
somewhere in your R code, without listing
Depends: qgraph
in your DESCRIPTION file.
HOWEVER, fixing this warning will lead to a different one, because
that's not the recommended way to do things now. There are two
possibilities:
1. Your package is useless without the dependency.
In this case, you should put
Imports: qgraph, ...
in the DESCRIPTION file (where ... lists the other packages with the
same status), and list the functions in those packages in your NAMESPACE
file, using
importFrom(qgraph, ...)
etc. (If you use Roxygen, you use comments in the source to get it to
put this into your NAMESPACE file.)
2. Your package works without the dependency, but you may want to issue
errors or warnings if it is missing.
Then you should put
Suggests: qgraph, ...
in the DESCRIPTION file, and to use a function from it, use something like
if (requireNamespace("qgraph")) {
qgraph::foo(...)
} else
warning("qgraph is not available.")
Duncan Murdoch
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