acp : <anonymous>: no visible global function definition for ‘sd’
acp: no visible binding for global variable ‘sd’
acpgen : <anonymous>: no visible global function definition for ‘sd’
acpgen: no visible global function definition for ‘var’
acpgen: no visible binding for global variable ‘sd’
acprob : <anonymous>: no visible global function definition for ‘sd’
acprob: no visible binding for global variable ‘sd’
biplot.acp: no visible global function definition for ‘plot.new’
biplot.acp: no visible global function definition for ‘plot.window’
biplot.acp: no visible global function definition for ‘axis’
biplot.acp: no visible global function definition for ‘box’
biplot.acp: no visible global function definition for ‘title’
biplot.acp: no visible global function definition for ‘text’
biplot.acp: no visible global function definition for ‘arrows’
biplot.acp: no visible global function definition for ‘lines’
pca : <anonymous>: no visible global function definition for ‘sd’
pca: no visible binding for global variable ‘sd’
plot.acp: no visible global function definition for ‘plot.new’
plot.acp: no visible global function definition for ‘plot.window’
plot.acp: no visible global function definition for ‘axis’
plot.acp: no visible global function definition for ‘box’
plot.acp: no visible global function definition for ‘title’
plot.acp: no visible global function definition for ‘points’
plot.acp: no visible global function definition for ‘par’
plot2: no visible global function definition for ‘barplot’
plotAll: no visible global function definition for ‘par’
plotAll: no visible global function definition for ‘plot’
plotAll: no visible global function definition for ‘biplot’
Undefined global functions or variables:
  arrows axis barplot biplot box lines par plot plot.new plot.window
  points sd text title var
Consider adding
  importFrom("graphics", "arrows", "axis", "barplot", "box", "lines",
             "par", "plot", "plot.new", "plot.window", "points", "text",
             "title")
  importFrom("stats", "biplot", "sd", "var")
to your NAMESPACE file.