addpart: no visible global function definition for ‘read.table’
addpart: no visible global function definition for ‘write.table’
compress2matrix: no visible global function definition for
  ‘write.table’
dcloc: no visible global function definition for ‘points’
dcloc: no visible global function definition for ‘lines’
dcloc: no visible global function definition for ‘legend’
dloc: no visible global function definition for ‘lm’
dloc: no visible global function definition for ‘mtext’
dloc: no visible global function definition for ‘lines’
dloc: no visible global function definition for ‘points’
dloc: no visible global function definition for ‘segments’
dloc: no visible global function definition for ‘predict’
dloc: no visible global function definition for ‘rnorm’
dloc: no visible global function definition for ‘runif’
dloc: no visible global function definition for ‘na.omit’
dloc: no visible global function definition for ‘legend’
gluesheets: no visible global function definition for ‘read.table’
gluesheets: no visible global function definition for ‘write.table’
plot.strat.column: no visible global function definition for ‘read.csv’
plot.strat.column: no visible global function definition for ‘grey’
plot.strat.column: no visible global function definition for ‘dev.off’
plot.strat.column: no visible global function definition for ‘pdf’
plot.strat.column: no visible global function definition for ‘dev.new’
plot.strat.column: no visible global function definition for ‘strwidth’
rangechart: no visible global function definition for ‘read.csv’
rangechart: no visible global function definition for ‘plot’
rangechart: no visible global function definition for ‘segments’
rangechart: no visible global function definition for ‘par’
rangechart: no visible global function definition for ‘grey’
rangechart: no visible global function definition for ‘axis’
rangechart: no visible global function definition for ‘points’
summary.strat.column: no visible global function definition for ‘str’
writeCONOP: no visible global function definition for ‘write.table’
Undefined global functions or variables:
  axis dev.new dev.off grey legend lines lm mtext na.omit par pdf plot
  points predict read.csv read.table rnorm runif segments str strwidth
  write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "grey", "pdf")
  importFrom("graphics", "axis", "legend", "lines", "mtext", "par",
             "plot", "points", "segments", "strwidth")
  importFrom("stats", "lm", "na.omit", "predict", "rnorm", "runif")
  importFrom("utils", "read.csv", "read.table", "str", "write.table")
to your NAMESPACE file.