catpcp: no visible global function definition for ‘par’
catpcp: no visible global function definition for ‘rect’
catpcp: no visible global function definition for ‘text’
catpcp: no visible global function definition for ‘axis’
desaturate_color: no visible global function definition for ‘col2rgb’
desaturate_color: no visible global function definition for ‘rgb2hsv’
desaturate_color: no visible global function definition for ‘hsv’
dist2edge: no visible global function definition for ‘as.dist’
edge2dist: no visible global function definition for ‘as.dist’
etour: no visible global function definition for ‘is’
etour: no visible global function definition for ‘as’
etour_ns: no visible global function definition for ‘is’
etour_ns: no visible global function definition for ‘as’
graph_compose: no visible global function definition for ‘new’
graph_product: no visible global function definition for ‘new’
graph_sum: no visible global function definition for ‘na.omit’
guided_pcp: no visible global function definition for ‘layout’
guided_pcp: no visible global function definition for ‘par’
guided_pcp: no visible global function definition for ‘plot.new’
guided_pcp: no visible global function definition for ‘barplot’
iterated_line_graph: no visible global function definition for ‘new’
kn: no visible global function definition for ‘new’
kne: no visible global function definition for ‘new’
kne: no visible global function definition for ‘as’
kspace_graph: no visible global function definition for ‘combn’
kspace_graph: no visible global function definition for ‘new’
mc_plot: no visible global function definition for ‘rainbow’
mc_plot : <anonymous>: no visible global function definition for
  ‘TukeyHSD’
mc_plot: no visible global function definition for ‘boxplot’
mk_binary_graph: no visible global function definition for ‘new’
mk_complete_graph: no visible global function definition for ‘new’
mk_line_graph: no visible global function definition for ‘new’
overlayCI: no visible global function definition for ‘par’
overlayCI: no visible global function definition for ‘gray.colors’
overlayCI: no visible global function definition for ‘lines’
overlayCI: no visible global function definition for ‘arrows’
overlayCI: no visible global function definition for ‘points’
overlayCI: no visible global function definition for ‘axis’
path_cor: no visible global function definition for ‘cor’
pcp: no visible global function definition for ‘par’
pcp: no visible global function definition for ‘matplot’
pcp: no visible global function definition for ‘axis’
pcp: no visible global function definition for ‘rect’
pcp: no visible global function definition for ‘lines’
pcp: no visible global function definition for ‘matpoints’
sort_edges: no visible global function definition for ‘new’
sort_edges: no visible global function definition for ‘as’
table_plot: no visible global function definition for ‘lines’
table_plot: no visible global function definition for ‘points’
table_plot: no visible global function definition for ‘rect’
table_plot: no visible global function definition for ‘axis’
table_plot: no visible global function definition for ‘na.omit’
eulerian,matrix: no visible global function definition for ‘as.dist’
mk_even_graph,graphNEL: no visible global function definition for ‘as’
mk_even_graph,graphNEL: no visible global function definition for ‘new’
Undefined global functions or variables:
  TukeyHSD arrows as as.dist axis barplot boxplot col2rgb combn cor
  gray.colors hsv is layout lines matplot matpoints na.omit new par
  plot.new points rainbow rect rgb2hsv text
Consider adding
  importFrom("grDevices", "col2rgb", "gray.colors", "hsv", "rainbow",
             "rgb2hsv")
  importFrom("graphics", "arrows", "axis", "barplot", "boxplot",
             "layout", "lines", "matplot", "matpoints", "par",
             "plot.new", "points", "rect", "text")
  importFrom("methods", "as", "is", "new")
  importFrom("stats", "TukeyHSD", "as.dist", "cor", "na.omit")
  importFrom("utils", "combn")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').