community.sync: no visible global function definition for
  ‘txtProgressBar’
community.sync: no visible global function definition for
  ‘setTxtProgressBar’
community.sync.aux: no visible binding for global variable ‘sd’
community.sync.aux: no visible global function definition for ‘var’
coord2dist: no visible global function definition for ‘dist’
correlated.matrix: no visible global function definition for ‘rnorm’
kendall.w: no visible global function definition for ‘txtProgressBar’
kendall.w: no visible global function definition for
  ‘setTxtProgressBar’
kendall.w.aux: no visible global function definition for ‘pchisq’
meancorr: no visible global function definition for ‘txtProgressBar’
meancorr: no visible global function definition for ‘setTxtProgressBar’
meancorr.aux: no visible global function definition for ‘cor’
peaks: no visible global function definition for ‘txtProgressBar’
peaks: no visible global function definition for ‘setTxtProgressBar’
phase.partnered: no visible global function definition for ‘runif’
phase.partnered: no visible binding for global variable ‘sd’
phase.sync: no visible global function definition for ‘hist’
phase.sync: no visible global function definition for ‘quantile’
phase.sync: no visible global function definition for ‘txtProgressBar’
phase.sync: no visible global function definition for
  ‘setTxtProgressBar’
phase.sync.aux: no visible global function definition for ‘approx’
plot.synchrony: no visible global function definition for ‘hist’
plot.synchrony: no visible global function definition for ‘abline’
plot.synchrony: no visible global function definition for ‘box’
plot.vario: no visible global function definition for ‘plot’
plot.vario: no visible binding for global variable ‘quantile’
plot.vario: no visible global function definition for ‘polygon’
plot.vario: no visible global function definition for ‘points’
plot.vario: no visible global function definition for ‘abline’
plot.variofit: no visible global function definition for ‘plot’
plot.variofit: no visible global function definition for ‘lines’
plot.variofit: no visible global function definition for ‘legend’
rmse.expo: no visible global function definition for ‘weighted.mean’
rmse.gauss: no visible global function definition for ‘weighted.mean’
rmse.hole: no visible global function definition for ‘weighted.mean’
rmse.lin: no visible global function definition for ‘weighted.mean’
rmse.period: no visible global function definition for ‘weighted.mean’
rmse.sill: no visible global function definition for ‘weighted.mean’
rmse.sphere: no visible global function definition for ‘weighted.mean’
surrogate.ts: no visible global function definition for ‘quantile’
vario: no visible global function definition for ‘txtProgressBar’
vario: no visible global function definition for ‘complete.cases’
vario: no visible global function definition for ‘setTxtProgressBar’
vario: no visible global function definition for ‘p.adjust’
vario.aux: no visible global function definition for ‘cov’
vario.aux: no visible global function definition for ‘cor’
vario.aux : <anonymous>: no visible global function definition for
  ‘na.omit’
vario.aux: no visible global function definition for ‘combn’
vario.aux: no visible global function definition for ‘sd’
vario.aux: no visible global function definition for ‘complete.cases’
vario.fit: no visible global function definition for ‘lm’
vario.fit: no visible global function definition for ‘nls’
vario.fit: no visible global function definition for ‘coef’
vario.fit: no visible global function definition for ‘optim’
vario.func: no visible global function definition for ‘cov’
vario.func: no visible global function definition for ‘cor’
vario.stats: no visible global function definition for ‘predict’
vario.stats: no visible global function definition for ‘coef’
Undefined global functions or variables:
  abline approx box coef combn complete.cases cor cov dist hist legend
  lines lm na.omit nls optim p.adjust pchisq plot points polygon
  predict quantile rnorm runif sd setTxtProgressBar txtProgressBar var
  weighted.mean
Consider adding
  importFrom("graphics", "abline", "box", "hist", "legend", "lines",
             "plot", "points", "polygon")
  importFrom("stats", "approx", "coef", "complete.cases", "cor", "cov",
             "dist", "lm", "na.omit", "nls", "optim", "p.adjust",
             "pchisq", "predict", "quantile", "rnorm", "runif", "sd",
             "var", "weighted.mean")
  importFrom("utils", "combn", "setTxtProgressBar", "txtProgressBar")
to your NAMESPACE file.