compute.beta.hat: no visible global function definition for 'lm'
drop.response: no visible global function definition for 'terms'
drop.response: no visible global function definition for 'reformulate'
km: no visible global function definition for 'model.matrix'
km1Nugget.init: no visible global function definition for 'lm'
km1Nugget.init: no visible global function definition for 'sd'
km1Nugget.init: no visible global function definition for 'dist'
km1Nugget.init: no visible global function definition for 'quantile'
km1Nugget.init: no visible global function definition for 'runif'
kmData: no visible global function definition for 'as.formula'
kmData: no visible global function definition for 'terms'
kmEstimate: no visible global function definition for 'optim'
kmEstimate: no visible global function definition for 'lm'
kmNoNugget.init: no visible global function definition for 'runif'
kmNuggets.init: no visible global function definition for 'runif'
kmNuggets.init: no visible global function definition for 'lm'
kmNuggets.init: no visible global function definition for 'var'
kmNuggets.init: no visible global function definition for 'dist'
kmNuggets.init: no visible global function definition for 'quantile'
leaveOneOut.km: no visible global function definition for
  'model.matrix'
leaveOneOut.km: no visible global function definition for 'lm'
plot.km: no visible global function definition for 'par'
plot.km: no visible global function definition for 'lines'
plot.km: no visible global function definition for 'qqnorm'
plot.km: no visible global function definition for 'qqline'
predict.km: no visible global function definition for 'model.matrix'
predict.km: no visible global function definition for 'qnorm'
predict.km: no visible global function definition for 'qt'
scalingFun: no visible global function definition for 'abline'
scalingGrad1d: no visible global function definition for 'matplot'
scalingGrad1d: no visible global function definition for 'abline'
simulate.km: no visible global function definition for 'model.matrix'
simulate.km: no visible global function definition for 'rnorm'
trend.deltax: no visible global function definition for 'model.matrix'
trendMatrix.update: no visible global function definition for
  'model.matrix'
paramSample,covAffineScaling: no visible global function definition for
  'runif'
paramSample,covIso: no visible global function definition for 'runif'
paramSample,covScaling: no visible global function definition for
  'runif'
paramSample,covTensorProduct: no visible global function definition for
  'runif'
vect2covparam,covScaling: no visible global function definition for
  'unstack'
Undefined global functions or variables:
  abline as.formula dist lines lm matplot model.matrix optim par qnorm
  qqline qqnorm qt quantile reformulate rnorm runif sd terms unstack
  var
Consider adding
  importFrom("graphics", "abline", "lines", "matplot", "par")
  importFrom("stats", "as.formula", "dist", "lm", "model.matrix",
             "optim", "qnorm", "qqline", "qqnorm", "qt", "quantile",
             "reformulate", "rnorm", "runif", "sd", "terms", "var")
  importFrom("utils", "unstack")
to your NAMESPACE file.