MDSplot: no visible global function definition for ‘par’
MDSplot: no visible global function definition for ‘rainbow’
MDSplot: no visible global function definition for ‘plot’
MDSplot: no visible global function definition for ‘pairs’
RRF.default: no visible global function definition for ‘var’
RRF.formula: no visible binding for global variable ‘na.fail’
RRF.formula: no visible global function definition for ‘model.response’
RRF.formula: no visible global function definition for ‘model.frame’
RRF.formula: no visible global function definition for ‘terms’
RRF.formula: no visible global function definition for ‘reformulate’
classCenter : <anonymous>: no visible binding for global variable
  ‘median’
grow.RRF: no visible global function definition for ‘update’
na.roughfix.data.frame : roughfix: no visible global function
  definition for ‘median’
na.roughfix.default: no visible global function definition for ‘median’
outlier.default: no visible global function definition for ‘median’
outlier.default: no visible global function definition for ‘mad’
partialPlot.RRF: no visible global function definition for ‘predict’
partialPlot.RRF: no visible global function definition for
  ‘weighted.mean’
partialPlot.RRF: no visible global function definition for ‘points’
partialPlot.RRF: no visible global function definition for ‘barplot’
partialPlot.RRF: no visible global function definition for ‘lines’
partialPlot.RRF: no visible global function definition for ‘quantile’
plot.RRF: no visible global function definition for ‘matplot’
plot.margin: no visible global function definition for ‘rainbow’
plot.margin: no visible global function definition for ‘plot.default’
predict.RRF: no visible global function definition for
  ‘delete.response’
predict.RRF: no visible global function definition for ‘model.frame’
predict.RRF: no visible binding for global variable ‘na.omit’
rrfImpute.formula: no visible global function definition for
  ‘model.response’
rrfcv: no visible global function definition for ‘quantile’
tuneRRF: no visible global function definition for ‘axis’
varImpPlot: no visible global function definition for ‘par’
varImpPlot: no visible global function definition for ‘dotchart’
varImpPlot: no visible global function definition for ‘mtext’
Undefined global functions or variables:
  axis barplot delete.response dotchart lines mad matplot median
  model.frame model.response mtext na.fail na.omit pairs par plot
  plot.default points predict quantile rainbow reformulate terms update
  var weighted.mean
Consider adding
  importFrom("grDevices", "rainbow")
  importFrom("graphics", "axis", "barplot", "dotchart", "lines",
             "matplot", "mtext", "pairs", "par", "plot", "plot.default",
             "points")
  importFrom("stats", "delete.response", "mad", "median", "model.frame",
             "model.response", "na.fail", "na.omit", "predict",
             "quantile", "reformulate", "terms", "update", "var",
             "weighted.mean")
to your NAMESPACE file.