R: selective import with importFrom: namespace issues

Asked Jul 10 '13 at 17:40

Active Jul 10 '13 at 17:40

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I am building an R package and want to get my dependencies right. I use the function Linp from the LIM package. LIM is listed in the 'Imports' field in my DESCRIPTION file. I import the function in my NAMESPACE file:

importFrom("LIM", "Linp")

When running R CMD CHECK I get an error when the example of the function which uses Linp is run:

Error: could not find function "linp"

So there seems to be Linp and linp.

The following fails:

importFrom("LIM", "linp")
Error : object ‘linp’ is not exported by 'namespace:LIM'

because there is no LIM::linp. However, there is a limSolve::linp, but if I add limSolve in DESCRIPTION and put the following into my NAMESPACE:

importFrom("limSolve", "linp")

I still get the error:

Error: could not find function "linp"

What am I missing here?

asked Jul 10 '13 at 17:40

user1981275

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So... find the section of your code that calls `linp` and change it to `Linp`? – Hong Ooi Jul 10 '13 at 17:55
My code does not call `linp` but `Linp`. – user1981275 Jul 10 '13 at 17:56
`R CMD CHECK` says otherwise. You probably have a typo. – Hong Ooi Jul 10 '13 at 17:57
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I got it to work by putting `LIM` in `Depends` and not in `Imports` in `DESCRIPTION`. – user1981275 Jul 10 '13 at 17:58
@Hong Ooi: `R CMD check`, of course – user1981275 Jul 10 '13 at 17:58
I found this in the Bioconductor package instructions: **Depends: is appropriate when a package is used in the example section of a man page.** That is true in my case. – user1981275 Jul 10 '13 at 17:59
See the caveat section of [this post](http://stackoverflow.com/a/8638902/967840) – GSee Jul 10 '13 at 18:07
Ah, that's it! Now it becomes clear! – user1981275 Jul 10 '13 at 18:11

R: selective import with importFrom: namespace issues

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