.distfit: no visible binding for global variable ‘qgamma’
.distfit: no visible binding for global variable ‘qnorm’
.distfit: no visible global function definition for ‘optim’
CGoptim: no visible global function definition for ‘optimize’
basePlot: no visible global function definition for ‘lines’
demAutoOptimiseGp: no visible global function definition for
  ‘graphics.off’
demAutoOptimiseGp: no visible global function definition for ‘dev.new’
demAutoOptimiseGp: no visible global function definition for ‘plot.new’
demAutoOptimiseGp: no visible global function definition for ‘title’
demAutoOptimiseGp: no visible global function definition for
  ‘dev.copy2eps’
demGpCov2D: no visible global function definition for ‘graphics.off’
demGpCov2D: no visible global function definition for ‘dev.new’
demGpCov2D: no visible global function definition for ‘lines’
demGpCov2D: no visible global function definition for ‘dev.set’
demGpCov2D: no visible global function definition for ‘dev.copy2eps’
demGpSample: no visible global function definition for ‘graphics.off’
demGpSample: no visible global function definition for ‘par’
demGpSample: no visible global function definition for ‘heat.colors’
demGpSample: no visible global function definition for ‘gray.colors’
demGpSample: no visible global function definition for ‘dev.copy2eps’
demGpSample: no visible global function definition for ‘dev.new’
demInterpolation: no visible global function definition for
  ‘graphics.off’
demInterpolation: no visible global function definition for ‘dev.new’
demInterpolation: no visible global function definition for ‘plot.new’
demInterpolation: no visible global function definition for
  ‘dev.copy2eps’
demInterpolation: no visible global function definition for ‘points’
demOptimiseGp: no visible global function definition for ‘graphics.off’
demOptimiseGp: no visible global function definition for ‘dev.new’
demOptimiseGp: no visible global function definition for ‘plot.new’
demOptimiseGp: no visible global function definition for ‘dev.copy2eps’
demOptimiseGp: no visible global function definition for ‘matplot’
demOptimiseGp: no visible global function definition for ‘legend’
demRegression: no visible global function definition for ‘graphics.off’
demRegression: no visible global function definition for ‘dev.new’
demRegression: no visible global function definition for ‘plot.new’
demRegression: no visible global function definition for ‘dev.copy2eps’
demRegression: no visible global function definition for ‘points’
gaussSamp: no visible global function definition for ‘rnorm’
gpCovGrads: no visible global function definition for ‘diag.spam’
gpCreate: no visible global function definition for ‘sd’
gpPlot: no visible global function definition for ‘rgb’
gpPlot: no visible global function definition for ‘polygon’
gpPlot: no visible global function definition for ‘points’
gpPlot: no visible global function definition for ‘lines’
gpPlot: no visible global function definition for ‘rnorm’
gpPosteriorSample: no visible global function definition for ‘runif’
gpPosteriorSample: no visible global function definition for
  ‘graphics.off’
gpPosteriorSample: no visible global function definition for ‘dev.new’
gpPosteriorSample: no visible global function definition for ‘plot.new’
gpPosteriorSample: no visible global function definition for ‘matplot’
gpPosteriorSample: no visible global function definition for ‘points’
gpPosteriorSample: no visible global function definition for
  ‘dev.copy2eps’
gpSample: no visible global function definition for ‘graphics.off’
gpSample: no visible global function definition for ‘dev.new’
gpSample: no visible global function definition for ‘plot.new’
gpSample: no visible global function definition for ‘matplot’
gpSample: no visible global function definition for ‘dev.copy2eps’
gpTest: no visible global function definition for ‘rnorm’
gpUpdateAD: no visible global function definition for ‘diag.spam’
gpUpdateKernels: no visible global function definition for ‘diag.spam’
kernTest: no visible global function definition for ‘rnorm’
zeroAxes: no visible global function definition for ‘abline’
Undefined global functions or variables:
  abline dev.copy2eps dev.new dev.set diag.spam graphics.off
  gray.colors heat.colors legend lines matplot optim optimize par
  plot.new points polygon qgamma qnorm rgb rnorm runif sd title
Consider adding
  importFrom("grDevices", "dev.copy2eps", "dev.new", "dev.set",
             "graphics.off", "gray.colors", "heat.colors", "rgb")
  importFrom("graphics", "abline", "legend", "lines", "matplot", "par",
             "plot.new", "points", "polygon", "title")
  importFrom("stats", "optim", "optimize", "qgamma", "qnorm", "rnorm",
             "runif", "sd")
to your NAMESPACE file.