Fb.test.pls: no visible global function definition for 'lm'
Fb.test.pls: no visible global function definition for 'pf'
Fc.test.pls: no visible global function definition for 'lm'
Fc.test.pls: no visible global function definition for 'pf'
Fc.test.reg: no visible global function definition for 'lm'
Fc.test.reg: no visible global function definition for 'pf'
Fg.test.pls: no visible global function definition for 'lm'
Fg.test.pls: no visible global function definition for 'pf'
Fg.test.reg: no visible global function definition for 'lm'
Fg.test.reg: no visible global function definition for 'pf'
invariance: no visible global function definition for 'lm'
invariance: no visible global function definition for 'pchisq'
invariance: no visible global function definition for 'tail'
invariance_test: no visible global function definition for 'lm'
invariance_test: no visible global function definition for 'pchisq'
invariance_test: no visible global function definition for 'tail'
plot.treemodel: no visible global function definition for 'rainbow'
plot.treemodel: no visible global function definition for 'dev.new'
plot.treemodel: no visible global function definition for 'par'
plot.treemodel: no visible global function definition for 'barplot'
plot.treemodel: no visible global function definition for 'abline'
plot.treemodel: no visible global function definition for 'box'
plot.treemodelreg: no visible global function definition for 'rainbow'
plot.treemodelreg: no visible global function definition for 'par'
plot.treemodelreg: no visible global function definition for 'barplot'
plot.treemodelreg: no visible global function definition for 'abline'
plot.xtree.pls: no visible global function definition for 'dev.new'
plot.xtree.pls: no visible global function definition for 'par'
plot.xtree.pls: no visible global function definition for 'text'
plot.xtree.reg: no visible global function definition for 'dev.new'
plot.xtree.reg: no visible global function definition for 'par'
plot.xtree.reg: no visible global function definition for 'text'
pls.pathmox: no visible global function definition for 'plot'
reg.pathmox: no visible global function definition for 'model.frame'
reg.pathmox: no visible global function definition for 'plot'
reg.treemodel: no visible global function definition for 'lm'
reg.treemodel: no visible global function definition for 'coef'
splitopt.pls: no visible global function definition for 'lm'
splitopt.pls: no visible global function definition for 'pf'
splitopt.reg: no visible global function definition for 'lm'
splitopt.reg: no visible global function definition for 'pf'
summary.xtree.pls: no visible global function definition for
  'printCoefmat'
summary.xtree.reg: no visible global function definition for
  'printCoefmat'
test.particion.reg: no visible binding for global variable 'df'
Undefined global functions or variables:
  abline barplot box coef dev.new df lm model.frame par pchisq pf plot
  printCoefmat rainbow tail text
Consider adding
  importFrom("grDevices", "dev.new", "rainbow")
  importFrom("graphics", "abline", "barplot", "box", "par", "plot",
             "text")
  importFrom("stats", "coef", "df", "lm", "model.frame", "pchisq", "pf",
             "printCoefmat")
  importFrom("utils", "tail")
to your NAMESPACE file.