bent.cable: no visible global function definition for ‘lm’
bent.cable: no visible global function definition for ‘dnorm’
calc.CI.LocallyWeightedPolynomial: no visible global function
  definition for ‘qt’
calc.CI.LocallyWeightedPolynomial: no visible global function
  definition for ‘pnorm’
calc.CI.LocallyWeightedPolynomial: no visible global function
  definition for ‘qnorm’
kernel.h: no visible global function definition for ‘dnorm’
locally.weighted.polynomial: no visible global function definition for
  ‘bw.SJ’
locally.weighted.polynomial: no visible global function definition for
  ‘predict’
logLik.PiecewiseLinear: no visible global function definition for
  ‘logLik’
logLik.bent_cable: no visible global function definition for ‘logLik’
piecewise.linear: no visible global function definition for ‘lm’
piecewise.linear: no visible global function definition for ‘predict’
piecewise.linear : my.cp: no visible global function definition for
  ‘lm’
piecewise.linear: no visible binding for global variable ‘quantile’
piecewise.linear.simple : piecewise.linear.likelihood: no visible
  global function definition for ‘lm’
piecewise.linear.simple : piecewise.linear.likelihood: no visible
  global function definition for ‘coefficients’
piecewise.linear.simple : piecewise.linear.likelihood: no visible
  global function definition for ‘dnorm’
piecewise.linear.simple: no visible global function definition for
  ‘optimize’
plot.LocallyWeightedPolynomial: no visible global function definition
  for ‘plot’
plot.LocallyWeightedPolynomial: no visible global function definition
  for ‘lines’
plot.LocallyWeightedPolynomial: no visible global function definition
  for ‘polygon’
plot.LocallyWeightedPolynomial: no visible global function definition
  for ‘points’
plot.PiecewiseLinear: no visible global function definition for ‘plot’
plot.PiecewiseLinear: no visible global function definition for ‘lines’
plot.SiZer: no visible global function definition for ‘image’
plot.SiZer: no visible global function definition for ‘lines’
Undefined global functions or variables:
  bw.SJ coefficients dnorm image lines lm logLik optimize plot pnorm
  points polygon predict qnorm qt quantile
Consider adding
  importFrom("graphics", "image", "lines", "plot", "points", "polygon")
  importFrom("stats", "bw.SJ", "coefficients", "dnorm", "lm", "logLik",
             "optimize", "pnorm", "predict", "qnorm", "qt", "quantile")
to your NAMESPACE file.