AIC.cal: no visible global function definition for 'AIC'
anova.lmcal: no visible global function definition for 'anova'
anova.nlscal: no visible global function definition for 'anova'
confint.cal: no visible global function definition for 'confint'
confint.cal: no visible global function definition for 'pnorm'
dstat: no visible global function definition for 'median'
dstat : means: no visible global function definition for 't.test'
dstat : medians: no visible global function definition for
  'wilcox.test'
dstat : medians: no visible global function definition for 'median'
dstat : vars: no visible global function definition for 'var'
dstat : vars: no visible global function definition for 'sd'
dstat : rsds: no visible global function definition for 'var'
dstat : rsds: no visible global function definition for 'qchisq'
dstat : ranges: no visible global function definition for
  'shapiro.test'
dstat : ranges: no visible global function definition for 'IQR'
dstat : ranges: no visible global function definition for 'mad'
dstat: no visible global function definition for 'var.test'
dstat: no visible global function definition for 't.test'
dstat: no visible global function definition for 'ansari.test'
dstat: no visible global function definition for 'wilcox.test'
dstat: no visible global function definition for 'anova'
dstat: no visible global function definition for 'aov'
dstat: no visible global function definition for 'kruskal.test'
dstat: no visible global function definition for 'bartlett.test'
dstat: no visible global function definition for 'fligner.test'
dstat: no visible global function definition for 'printCoefmat'
lmcal : weigh: no visible global function definition for 'lm'
lmcal: no visible global function definition for 'lm'
lmcal: no visible global function definition for 'update'
lmcal: no visible global function definition for 'predict'
lof: no visible global function definition for 'anova'
nlscal: no visible global function definition for 'nls'
nlscal: no visible global function definition for 'loess'
nlscal: no visible global function definition for 'predict'
nlscal: no visible global function definition for 'lm'
plot.lmcal : plotcurve: no visible global function definition for
  'plot'
plot.lmcal : plotresiduals: no visible global function definition for
  'plot'
plot.lmcal : plotresiduals: no visible global function definition for
  'abline'
plot.lmcal : plotresiduals: no visible global function definition for
  'loess'
plot.lmcal : plotresiduals: no visible global function definition for
  'predict'
plot.lmcal : plotchronologic: no visible global function definition for
  'plot'
plot.lmcal : plotchronologic: no visible global function definition for
  'abline'
plot.lmcal : plotchronologic: no visible global function definition for
  'loess'
plot.lmcal : plotchronologic: no visible global function definition for
  'fitted'
plot.lmcal : plotqqplot: no visible global function definition for
  'qqnorm'
plot.lmcal : plotqqplot: no visible global function definition for
  'qqline'
plot.lmcal : plotcook: no visible global function definition for 'plot'
plot.lmcal: no visible global function definition for 'plot'
plot.lmcal: no visible global function definition for 'abline'
plot.lmcal: no visible global function definition for 'mtext'
plot.nlscal : plotcurve: no visible global function definition for
  'plot'
plot.nlscal : plotresiduals: no visible global function definition for
  'plot'
plot.nlscal : plotresiduals: no visible global function definition for
  'abline'
plot.nlscal : plotresiduals: no visible global function definition for
  'loess'
plot.nlscal : plotresiduals: no visible global function definition for
  'predict'
plot.nlscal : plotchronologic: no visible global function definition
  for 'plot'
plot.nlscal : plotchronologic: no visible global function definition
  for 'abline'
plot.nlscal : plotchronologic: no visible global function definition
  for 'loess'
plot.nlscal : plotchronologic: no visible global function definition
  for 'fitted'
plot.nlscal : plotqqplot: no visible global function definition for
  'qqnorm'
plot.nlscal : plotqqplot: no visible global function definition for
  'qqline'
plot.nlscal : plotcook: no visible global function definition for
  'plot'
predict.lmcal : inverse.predict: no visible global function definition
  for 'coefficients'
predict.lmcal: no visible global function definition for 'predict'
predict.lmcal: no visible global function definition for 'df.residual'
predict.lmcal: no visible global function definition for 'qt'
predict.lmcal: no visible global function definition for 'qnorm'
predict.nlscal : pred: no visible global function definition for
  'predict'
predict.nlscal: no visible global function definition for 'uniroot'
print.lmcal: no visible global function definition for 'AIC'
print.lmcal: no visible global function definition for 'printCoefmat'
print.nlscal: no visible global function definition for 'AIC'
print.nlscal: no visible global function definition for 'printCoefmat'
residuals.cal: no visible global function definition for 'residuals'
summary.lmcal : durbin: no visible global function definition for
  'model.frame'
summary.lmcal : durbin: no visible global function definition for
  'model.response'
summary.lmcal : durbin: no visible global function definition for
  'model.matrix'
summary.lmcal : durbin: no visible global function definition for
  'residuals'
summary.lmcal : durbin: no visible global function definition for
  'filter'
summary.lmcal : durbin: no visible global function definition for
  'pnorm'
summary.lmcal: no visible global function definition for 'pnorm'
summary.lmcal: no visible global function definition for 'shapiro.test'
summary.lmcal: no visible global function definition for 'residuals'
summary.lmcal: no visible global function definition for 'quantile'
summary.lmcal: no visible global function definition for 'AIC'
summary.lmcal: no visible global function definition for
  'bartlett.test'
summary.lmcal: no visible binding for global variable 'var'
summary.lmcal: no visible global function definition for 'printCoefmat'
summary.nlscal : durbin: no visible global function definition for
  'residuals'
summary.nlscal: no visible global function definition for 'AIC'
summary.nlscal: no visible global function definition for
  'shapiro.test'
summary.nlscal: no visible global function definition for 'residuals'
summary.nlscal: no visible global function definition for 'quantile'
summary.nlscal: no visible global function definition for
  'bartlett.test'
summary.nlscal: no visible binding for global variable 'var'
summary.nlscal: no visible global function definition for
  'printCoefmat'
vstat: no visible global function definition for 'anova'
vstat: no visible global function definition for 'aov'
Undefined global functions or variables:
  AIC IQR abline anova ansari.test aov bartlett.test coefficients
  confint df.residual filter fitted fligner.test kruskal.test lm loess
  mad median model.frame model.matrix model.response mtext nls plot
  pnorm predict printCoefmat qchisq qnorm qqline qqnorm qt quantile
  residuals sd shapiro.test t.test uniroot update var var.test
  wilcox.test
Consider adding
  importFrom("graphics", "abline", "mtext", "plot")
  importFrom("stats", "AIC", "IQR", "anova", "ansari.test", "aov",
             "bartlett.test", "coefficients", "confint", "df.residual",
             "filter", "fitted", "fligner.test", "kruskal.test", "lm",
             "loess", "mad", "median", "model.frame", "model.matrix",
             "model.response", "nls", "pnorm", "predict", "printCoefmat",
             "qchisq", "qnorm", "qqline", "qqnorm", "qt", "quantile",
             "residuals", "sd", "shapiro.test", "t.test", "uniroot",
             "update", "var", "var.test", "wilcox.test")
to your NAMESPACE file.