r2lBivContingencyTable: no visible global function definition for
  ‘addmargins’
r2lBivSummaryArray: no visible global function definition for ‘na.omit’
r2lBivSummaryArray: no visible global function definition for ‘var’
r2lBivSummaryArray: no visible global function definition for ‘sd’
r2lBivTestAnova: no visible global function definition for ‘anova’
r2lBivTestAnova: no visible global function definition for ‘lm’
r2lBivTestCorPearson: no visible global function definition for
  ‘cor.test’
r2lBivTestCorSpearman: no visible global function definition for
  ‘cor.test’
r2lBivTestFisherExact: no visible global function definition for
  ‘fisher.test’
r2lBivTestKruskalWallis: no visible global function definition for
  ‘kruskal.test’
r2lBivTestKruskalWallisInv: no visible global function definition for
  ‘kruskal.test’
r2lBivTestOddsRatio: no visible global function definition for ‘pnorm’
r2lBivTestRelativeRisk: no visible global function definition for
  ‘pnorm’
r2lBivTestStudent: no visible global function definition for ‘t.test’
r2lBivTestWilcoxon: no visible global function definition for
  ‘wilcox.test’
r2lDensities: no visible global function definition for ‘na.omit’
r2lDensities: no visible global function definition for ‘density’
r2lDensities: no visible global function definition for ‘plot’
r2lDensities: no visible global function definition for ‘lines’
r2lGraphBarplot: no visible global function definition for ‘na.omit’
r2lGraphHist: no visible global function definition for ‘hist’
r2lMakePlot: no visible global function definition for ‘dev.off’
r2lUnivSummary: no visible global function definition for ‘na.omit’
r2lUnivSummary: no visible global function definition for ‘var’
r2lUnivSummary: no visible global function definition for ‘sd’
redToBlue: no visible global function definition for ‘rgb’
Undefined global functions or variables:
  addmargins anova cor.test density dev.off fisher.test hist
  kruskal.test lines lm na.omit plot pnorm rgb sd t.test var
  wilcox.test
Consider adding
  importFrom("grDevices", "dev.off", "rgb")
  importFrom("graphics", "hist", "lines", "plot")
  importFrom("stats", "addmargins", "anova", "cor.test", "density",
             "fisher.test", "kruskal.test", "lm", "na.omit", "pnorm",
             "sd", "t.test", "var", "wilcox.test")
to your NAMESPACE file.