Some minor issues during R check: undefined global functions etc.

[barracuda156]

* checking R code for possible problems ... NOTE
BPCA_initmodel: no visible global function definition for ‘cov’
Q2: no visible global function definition for ‘txtProgressBar’
Q2: no visible global function definition for ‘setTxtProgressBar’
Q2: no visible global function definition for ‘cor’
RnipalsPca: no visible global function definition for ‘na.omit’
cvseg : <anonymous>: no visible global function definition for
  ‘na.omit’
llsImpute: no visible global function definition for ‘cor’
nlpca: no visible global function definition for ‘runif’
nlpca: no visible global function definition for ‘rnorm’
plot.pcaRes: no visible global function definition for ‘gray’
plot.pcaRes: no visible global function definition for ‘barplot’
plot.pcaRes: no visible global function definition for ‘legend’
plotPcs : panel: no visible global function definition for ‘abline’
plotPcs : panel: no visible global function definition for ‘lines’
plotPcs : panel: no visible global function definition for ‘points’
plotPcs : panel: no visible global function definition for ‘text’
plotPcs: no visible global function definition for ‘pairs’
ppca: no visible global function definition for ‘rnorm’
ppca: no visible global function definition for ‘cov’
robustSvd: no visible binding for global variable ‘median’
simpleEllipse: no visible global function definition for ‘qf’
svdImpute: no visible global function definition for ‘prcomp’
svdPca: no visible global function definition for ‘prcomp’
plot,pcaRes: no visible global function definition for ‘gray’
plot,pcaRes: no visible global function definition for ‘barplot’
plot,pcaRes: no visible global function definition for ‘legend’
slplot,pcaRes: no visible global function definition for ‘par’
slplot,pcaRes: no visible global function definition for ‘layout’
slplot,pcaRes: no visible global function definition for ‘abline’
slplot,pcaRes: no visible global function definition for ‘lines’
Undefined global functions or variables:
  abline barplot cor cov gray layout legend lines median na.omit pairs
  par points prcomp qf rnorm runif setTxtProgressBar text
  txtProgressBar
Consider adding
  importFrom("grDevices", "gray")
  importFrom("graphics", "abline", "barplot", "layout", "legend",
             "lines", "pairs", "par", "points", "text")
  importFrom("stats", "cor", "cov", "median", "na.omit", "prcomp", "qf",
             "rnorm", "runif")
  importFrom("utils", "setTxtProgressBar", "txtProgressBar")
to your NAMESPACE file.

[hredestig]

Cheers for the issue, I'm happy to consider a merge request since I never seem to find time to work on this project anymore..

[barracuda156]

Cheers for the issue, I'm happy to consider a merge request since I never seem to find time to work on this project anymore..

@hredestig Thank you, I will see if I can fix that.