dbFD: no visible global function definition for ‘dist’
dbFD: no visible global function definition for ‘na.omit’
dbFD: no visible global function definition for ‘hclust’
dbFD: no visible global function definition for ‘cutree’
dbFD: no visible global function definition for ‘aggregate’
dbFD : divc: no visible global function definition for ‘as.dist’
dbFD: no visible global function definition for ‘as.dist’
fdisp: no visible binding for global variable ‘weighted.mean’
fdisp: no visible global function definition for ‘weighted.mean’
functcomp: no visible global function definition for ‘weighted.mean’
mahaldis: no visible global function definition for ‘dist’
maxent: no visible global function definition for ‘coef’
maxent: no visible global function definition for ‘lm’
maxent.test: no visible global function definition for ‘cor’
maxent.test: no visible global function definition for ‘par’
maxent.test: no visible global function definition for ‘bold’
maxent.test: no visible global function definition for ‘italic’
maxent.test: no visible global function definition for ‘abline’
maxent.test: no visible global function definition for ‘text’
maxent.test: no visible global function definition for ‘lines’
maxent.test: no visible global function definition for ‘mtext’
simul.dbFD : <anonymous>: no visible global function definition for
  ‘runif’
simul.dbFD : <anonymous>: no visible global function definition for
  ‘rnorm’
simul.dbFD : <anonymous>: no visible global function definition for
  ‘rlnorm’
simul.dbFD : fill.abun: no visible global function definition for
  ‘rlnorm’
simul.dbFD : fill.abun: no visible global function definition for
  ‘rnorm’
simul.dbFD : fill.abun: no visible global function definition for
  ‘runif’
simul.dbFD: no visible global function definition for ‘cor.test’
simul.dbFD: no visible global function definition for ‘italic’
simul.dbFD: no visible global function definition for ‘par’
simul.dbFD: no visible global function definition for ‘title’
simul.dbFD: no visible global function definition for ‘mtext’
simul.dbFD: no visible global function definition for ‘boxplot’
Undefined global functions or variables:
  abline aggregate as.dist bold boxplot coef cor cor.test cutree dist
  hclust italic lines lm mtext na.omit par rlnorm rnorm runif text
  title weighted.mean
Consider adding
  importFrom("graphics", "abline", "boxplot", "lines", "mtext", "par",
             "text", "title")
  importFrom("stats", "aggregate", "as.dist", "coef", "cor", "cor.test",
             "cutree", "dist", "hclust", "lm", "na.omit", "rlnorm",
             "rnorm", "runif", "weighted.mean")
to your NAMESPACE file.