[R-pkg-devel] [R] Please to remove the warning when trying to check a package.

[Duncan Murdoch]

On 07/12/2017 4:43 AM, Pijush Das wrote:
> Hello Sir,
> 
> 
> 
> I have been trying to create a package in R.
> When I have put the check option in R studio to check everything is ok that
> time I have found
> two warnings and three notes. Those are given below.
> 
> warnings:
> 1) * checking dependencies in R code ... WARNING
> '::' or ':::' import not declared from: 'SparseM'
> 'loadNamespace' or 'requireNamespace' calls not declared from:
>    'Matrix' 'SparseM'

Your DESCRIPTION file should list every package from which you are 
importing functions.  The usual place is in an item called "Imports"; 
"Suggests" might also be appropriate if the functions are only 
occasionally used (and you test for the presence of the optional package).

> 
> 2) * checking files in 'vignettes' ... WARNING
> Files in the 'vignettes' directory but no files in 'inst/doc':
>    'vignettes.Rmd', 'vignettes.pdf'

You probably missed another declaration in DESCRIPTION, i.e.

VignetteBuilder: knitr

Without this, R won't know that vignettes.Rmd is a vignette.

> 
> Notes:
> 1) * checking foreign function calls ... NOTE
> Foreign function call to a different package:
>    .C("svmpredict", ..., PACKAGE = "e1071")
> See chapter 'System and foreign language interfaces' in the 'Writing R
> Extensions' manual.

It's usually a bad idea to call directly to C code in another package. 
You'll need to read the referenced manual if you really want to do that.
> 
> 2) * checking R code for possible problems ... NOTE
> predict.packageXXX: no visible global function definition for 'as'
> predict.packageXXX: no visible global function definition for 'new'
> Undefined global functions or variables:
>    as new
> Consider adding

You cut off the advice that followed "Consider adding".  You should 
follow that advice.

> 
> 3) * checking DESCRIPTION meta-information ... NOTE
> Packages listed in more than one of Depends, Imports, Suggests, Enhances:
>    'e1071' 'nlme' 'openxlsx' 'pheatmap' 'RColorBrewer' 'R.rsp'
> A package should be listed in only one of these fields.

Just figure out which of those fields you want, and put the package 
names in just one of them.

> 
> 
> 
> Can anybody help me to short out those problem please ?
> 
> 
> Thank you very much.
> 
> 
> regards
> Pijush
> 
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Duncan Murdoch