NPVI: no visible global function definition for 'quantile'
SL.glm.condExpX2givenW: no visible global function definition for
  'as.formula'
SL.glm.condExpX2givenW: no visible global function definition for 'glm'
SL.glm.condExpXYgivenW: no visible global function definition for
  'as.formula'
SL.glm.condExpXYgivenW: no visible global function definition for 'glm'
SL.glm.g: no visible global function definition for 'as.formula'
SL.glm.g: no visible global function definition for 'glm'
SL.glm.theta: no visible global function definition for 'as.formula'
SL.glm.theta: no visible global function definition for 'glm'
as.character.NPVI: no visible global function definition for 'qnorm'
as.character.NPVI: no visible global function definition for 'pnorm'
estimateDevG: no visible global function definition for 'gaussian'
estimateDevMu: no visible global function definition for 'gaussian'
estimateDevTheta: no visible global function definition for 'gaussian'
estimateEpsilon.NPVI: no visible global function definition for
  'optimize'
estimateG: no visible global function definition for 'binomial'
estimateMuAux: no visible global function definition for 'gaussian'
estimatePsi: no visible global function definition for 'str'
estimatePsi: no visible global function definition for 'sd'
estimateTheta: no visible global function definition for 'gaussian'
getPValue.matrix: no visible global function definition for 'pnorm'
getSample: no visible global function definition for 'runif'
getSample: no visible binding for global variable 'qlogis'
getSample: no visible binding for global variable 'plogis'
getSample: no visible global function definition for 'rnorm'
getSample: no visible global function definition for 'str'
getSample : condProbUW: no visible global function definition for
  'dnorm'
getSample : condProbUXW: no visible global function definition for
  'dnorm'
getSample : foo: no visible global function definition for 'dnorm'
getSample: no visible global function definition for 'integrate'
getSample : effIC: no visible global function definition for 'str'
getSample: no visible global function definition for 'var'
getSic.NPVI: no visible global function definition for 'sd'
getSicAlt.NPVI: no visible global function definition for 'sd'
init.NPVI: no visible global function definition for 'str'
linearInterpolations: no visible global function definition for 'head'
linearInterpolations: no visible global function definition for 'tail'
partialCorrelation: no visible global function definition for 'var'
simulateData: no visible global function definition for 'runif'
simulateData: no visible global function definition for 'rnorm'
simulateData: no visible global function definition for 'sd'
simulateParsimoniouslyXgivenW: no visible global function definition
  for 'runif'
simulateParsimoniouslyYgivenXW: no visible global function definition
  for 'runif'
tmle.npvi: no visible global function definition for 'quantile'
tmle.npvi.: no visible global function definition for 'quantile'
tmle.npvi.: no visible global function definition for 'model.matrix'
tmle.npvi.: no visible global function definition for 'update'
update.NPVI: no visible global function definition for 'gaussian'
updateConv.NPVI: no visible global function definition for 'tail'
updateGNonTab.NPVI : g1: no visible binding for global variable
  'qlogis'
updateGNonTab.NPVI : g1: no visible binding for global variable
  'plogis'
updateGTab.NPVI: no visible binding for global variable 'qlogis'
updateGTab.NPVI: no visible binding for global variable 'plogis'
updatePsi.NPVI: no visible global function definition for 'str'
Undefined global functions or variables:
  as.formula binomial dnorm gaussian glm head integrate model.matrix
  optimize plogis pnorm qlogis qnorm quantile rnorm runif sd str tail
  update var
Consider adding
  importFrom("stats", "as.formula", "binomial", "dnorm", "gaussian",
             "glm", "integrate", "model.matrix", "optimize", "plogis",
             "pnorm", "qlogis", "qnorm", "quantile", "rnorm", "runif",
             "sd", "update", "var")
  importFrom("utils", "head", "str", "tail")
to your NAMESPACE file.