arf2Excel: no visible global function definition for ‘write.table’
correlationTest: no visible global function definition for ‘cor.test’
detSigmaDeriv: no visible global function definition for ‘deriv’
differenceCor: no visible global function definition for ‘dnorm’
fitModelOptim: no visible global function definition for ‘optim’
fitSimpleModelOptim: no visible global function definition for ‘optim’
fwhm.filter: no visible global function definition for ‘dnorm’
fwhm.filter: no visible global function definition for ‘convolve’
getHarvardOxford: no visible global function definition for
  ‘read.table’
getTalairach: no visible global function definition for ‘read.table’
makeColors: no visible global function definition for ‘rgb’
makeDiscreteImage: no visible global function definition for ‘quantile’
mcpCorrect: no visible global function definition for ‘pt’
mcpCorrect: no visible global function definition for ‘qt’
partialCor: no visible global function definition for ‘dt’
readFSLmat: no visible global function definition for ‘read.table’
readTimings: no visible global function definition for ‘read.table’
setIsoContour: no visible global function definition for ‘qchisq’
sliceColor: no visible global function definition for ‘rgb’
tsCor: no visible global function definition for ‘cor’
wald: no visible global function definition for ‘pf’
plot,fmri.data-missing: no visible global function definition for
  ‘dev.cur’
plot,fmri.data-missing: no visible global function definition for
  ‘dev.off’
summary,fmri.data: no visible global function definition for ‘quantile’
summary,fmri.data: no visible global function definition for ‘IQR’
Undefined global functions or variables:
  IQR convolve cor cor.test deriv dev.cur dev.off dnorm dt optim pf pt
  qchisq qt quantile read.table rgb write.table
Consider adding
  importFrom("grDevices", "dev.cur", "dev.off", "rgb")
  importFrom("stats", "IQR", "convolve", "cor", "cor.test", "deriv",
             "dnorm", "dt", "optim", "pf", "pt", "qchisq", "qt",
             "quantile")
  importFrom("utils", "read.table", "write.table")
to your NAMESPACE file.