Invalid MIT-MAGIC-COOKIE-1 keyboxcoxfitRx: no visible global function definition for ‘as.formula’
boxcoxfitRx: no visible global function definition for ‘lm’
covsum : <anonymous>: no visible global function definition for
  ‘fisher.test’
covsum : <anonymous>: no visible global function definition for
  ‘chisq.test’
covsum : <anonymous>: no visible global function definition for ‘lm’
covsum : <anonymous> : <anonymous>: no visible global function
  definition for ‘sd’
etsum: no visible global function definition for ‘as.formula’
etsum : <anonymous>: no visible global function definition for
  ‘as.formula’
etsum : <anonymous>: no visible global function definition for ‘median’
etsum: no visible global function definition for ‘median’
forestplot: no visible global function definition for ‘par’
forestplot: no visible global function definition for ‘plot’
forestplot: no visible global function definition for ‘abline’
forestplot: no visible global function definition for ‘segments’
forestplot: no visible global function definition for ‘axis’
forestplot: no visible global function definition for ‘mtext’
modelmatrix: no visible global function definition for ‘as.formula’
modelmatrix: no visible global function definition for ‘model.matrix’
plotci: no visible global function definition for ‘plot’
plotci: no visible global function definition for ‘lines’
plotci: no visible global function definition for ‘legend’
plotkm: no visible global function definition for ‘as.formula’
plotkm: no visible global function definition for ‘pchisq’
plotkm: no visible global function definition for ‘plot’
uvsum : <anonymous>: no visible global function definition for
  ‘as.formula’
uvsum : <anonymous>: no visible global function definition for ‘glm’
uvsum : <anonymous>: no visible global function definition for ‘lm’
Undefined global functions or variables:
  abline as.formula axis chisq.test fisher.test glm legend lines lm
  median model.matrix mtext par pchisq plot sd segments
Consider adding
  importFrom("graphics", "abline", "axis", "legend", "lines", "mtext",
             "par", "plot", "segments")
  importFrom("stats", "as.formula", "chisq.test", "fisher.test", "glm",
             "lm", "median", "model.matrix", "pchisq", "sd")
to your NAMESPACE file.