colByValue: no visible global function definition for 'image'
colByValue: no visible global function definition for 'axis'
heatmap3 : <anonymous>: no visible global function definition for
  'as.dist'
heatmap3 : <anonymous>: no visible global function definition for 'cor'
heatmap3: no visible global function definition for 'colorRampPalette'
heatmap3 : <anonymous>: no visible global function definition for
  'reorder'
heatmap3: no visible binding for global variable 'sd'
heatmap3: no visible global function definition for 'pdf'
heatmap3: no visible global function definition for 'dev.off'
heatmap3: no visible global function definition for 'as.dendrogram'
heatmap3: no visible global function definition for 'order.dendrogram'
heatmap3: no visible global function definition for 'dev.hold'
heatmap3: no visible global function definition for 'dev.flush'
heatmap3: no visible global function definition for 'par'
heatmap3: no visible global function definition for 'quantile'
heatmap3: no visible global function definition for 'layout'
heatmap3: no visible global function definition for 'image'
heatmap3: no visible global function definition for 'axis'
heatmap3: no visible global function definition for 'chisq.test'
heatmap3 : <anonymous>: no visible global function definition for
  'na.omit'
heatmap3: no visible global function definition for 'aov'
heatmap3: no visible global function definition for 'rainbow'
heatmap3: no visible global function definition for 'rect'
heatmap3: no visible global function definition for 'mtext'
heatmap3: no visible global function definition for 'plot'
heatmap3: no visible global function definition for 'frame'
heatmap3: no visible global function definition for 'title'
showAnn: no visible global function definition for 'plot'
showAnn: no visible global function definition for 'image'
showAnn: no visible global function definition for 'segments'
showAnn: no visible global function definition for 'abline'
showAnn: no visible global function definition for 'mtext'
showAnn: no visible global function definition for 'points'
showAnn: no visible global function definition for 'lines'
showAnn: no visible global function definition for 'lowess'
showAnn: no visible global function definition for 'axis'
showLegend: no visible global function definition for 'plot'
Undefined global functions or variables:
  abline aov as.dendrogram as.dist axis chisq.test colorRampPalette cor
  dev.flush dev.hold dev.off frame image layout lines lowess mtext
  na.omit order.dendrogram par pdf plot points quantile rainbow rect
  reorder sd segments title
Consider adding
  importFrom("grDevices", "colorRampPalette", "dev.flush", "dev.hold",
             "dev.off", "pdf", "rainbow")
  importFrom("graphics", "abline", "axis", "frame", "image", "layout",
             "lines", "mtext", "par", "plot", "points", "rect",
             "segments", "title")
  importFrom("stats", "aov", "as.dendrogram", "as.dist", "chisq.test",
             "cor", "lowess", "na.omit", "order.dendrogram", "quantile",
             "reorder", "sd")
to your NAMESPACE file.