as.clustrange.default : <anonymous>: no visible global function
  definition for ‘var’
as.clustrange.hclust: no visible global function definition for
  ‘cutree’
as.seqtree.hclust: no visible global function definition for ‘cutree’
crflegend: no visible global function definition for ‘par’
crflegend: no visible global function definition for ‘plot’
crflegend: no visible global function definition for ‘legend’
normalize.values: no visible global function definition for ‘var’
normalize.values: no visible global function definition for ‘median’
plot.clustrange : getline: no visible global function definition for
  ‘median’
plot.clustrange : <anonymous>: no visible global function definition
  for ‘qnorm’
plot.clustrange : <anonymous>: no visible global function definition
  for ‘var’
plot.clustrange : <anonymous>: no visible global function definition
  for ‘quantile’
plot.clustrange: no visible global function definition for ‘plot’
plot.clustrange: no visible global function definition for ‘lines’
plot.clustrange: no visible global function definition for ‘polygon’
plot.clustrange: no visible global function definition for
  ‘adjustcolor’
plot.clustrange: no visible global function definition for ‘legend’
plot.clustrangefamily: no visible global function definition for ‘par’
plot.clustrangefamily: no visible global function definition for
  ‘layout’
plot.clustrangefamily: no visible global function definition for ‘plot’
plot.clustrangefamily: no visible global function definition for
  ‘lines’
seqclustname: no visible global function definition for ‘xtabs’
wcAggregateCasesInternal: no visible global function definition for
  ‘aggregate’
wcClusterQualityInternal: no visible global function definition for
  ‘xtabs’
wcCmpCluster: no visible global function definition for ‘as.dist’
wcCmpCluster: no visible global function definition for ‘hclust’
wcKMedoids: no visible global function definition for ‘cutree’
wcSilhouetteObs: no visible global function definition for ‘xtabs’
Undefined global functions or variables:
  adjustcolor aggregate as.dist cutree hclust layout legend lines
  median par plot polygon qnorm quantile var xtabs
Consider adding
  importFrom("grDevices", "adjustcolor")
  importFrom("graphics", "layout", "legend", "lines", "par", "plot",
             "polygon")
  importFrom("stats", "aggregate", "as.dist", "cutree", "hclust",
             "median", "qnorm", "quantile", "var", "xtabs")
to your NAMESPACE file.