cfly_dist: no visible global function definition for 'ggplot'
cfly_dist: no visible global function definition for 'aes_string'
cfly_dist: no visible global function definition for 'geom_density'
cfly_dist: no visible global function definition for 'facet_grid'
cfly_fluct: no visible global function definition for 'ggplot'
cfly_fluct: no visible global function definition for 'aes_string'
cfly_fluct: no visible global function definition for 'geom_tile'
cfly_fluct: no visible global function definition for
  'scale_y_discrete'
cfly_fluct: no visible global function definition for
  'scale_x_discrete'
cfly_fluct: no visible global function definition for 'theme'
cfly_pcp: no visible global function definition for 'ggplot'
cfly_pcp: no visible global function definition for 'aes_string'
cfly_pcp: no visible global function definition for 'geom_line'
cfly_pcp: no visible global function definition for 'facet_wrap'
cut.hierfly: no visible global function definition for 'cutree'
ellipse: no visible global function definition for 'var'
ellipse: no visible global function definition for 'rnorm'
ellipse: no visible global function definition for 'qf'
ggobi.somiter: no visible binding for global variable 'step'
hierarchical: no visible global function definition for 'cutree'
hierarchical: no visible global function definition for 'hclust'
hierarchical: no visible global function definition for 'dist'
hierfly: no visible global function definition for 'hclust'
hierfly: no visible global function definition for 'dist'
olive_example: no visible binding for global variable 'kmeans'
print.hierfly: no visible global function definition for 'str'
rescaler : <anonymous>: no visible global function definition for 'sd'
rescaler : <anonymous>: no visible global function definition for
  'median'
rescaler : <anonymous>: no visible global function definition for 'mad'
som_iterate: no visible global function definition for 'quantile'
som_iterate: no visible global function definition for 'unit.distances'
summary.somiter : interesting: no visible global function definition
  for 'sd'
Undefined global functions or variables:
  aes_string cutree dist facet_grid facet_wrap geom_density geom_line
  geom_tile ggplot hclust kmeans mad median qf quantile rnorm
  scale_x_discrete scale_y_discrete sd step str theme unit.distances
  var
Consider adding
  importFrom("stats", "cutree", "dist", "hclust", "kmeans", "mad",
             "median", "qf", "quantile", "rnorm", "sd", "step", "var")
  importFrom("utils", "str")
to your NAMESPACE file.