.hydroplotboxplot: no visible global function definition for 'time'
.hydroplotboxplot: no visible global function definition for 'boxplot'
.hydroplothist: no visible global function definition for 'hist'
.hydroplotseasonal: no visible global function definition for 'par'
.hydroplotseasonal: no visible global function definition for 'layout'
.hydroplotseasonal: no visible global function definition for
  'plot.xts'
.hydroplotseasonal: no visible global function definition for 'axis'
.hydroplotseasonal: no visible global function definition for 'abline'
.hydroplotseasonal: no visible global function definition for 'boxplot'
.hydroplotts: no visible global function definition for 'plot.xts'
.hydroplotts: no visible global function definition for 'axis'
.hydroplotts: no visible global function definition for 'lines'
.hydroplotts: no visible global function definition for 'legend'
annualfunction.zoo: no visible global function definition for 'time'
annualfunction.zoo: no visible global function definition for
  'aggregate'
daily2annual.data.frame: no visible global function definition for
  'time'
daily2annual.zoo: no visible global function definition for 'time'
daily2annual.zoo: no visible global function definition for 'aggregate'
daily2annual.zoo: no visible global function definition for 'time<-'
daily2monthly.data.frame: no visible global function definition for
  'time'
daily2monthly.zoo: no visible global function definition for 'time'
daily2monthly.zoo: no visible global function definition for
  'aggregate'
dm2seasonal.zoo: no visible global function definition for 'time'
dm2seasonal.zoo: no visible global function definition for 'aggregate'
dm2seasonal.zoo: no visible global function definition for 'time<-'
drawTimeAxis: no visible global function definition for 'xy.coords'
drawTimeAxis: no visible global function definition for 'axis'
drawTimeAxis: no visible global function definition for 'index'
drawTimeAxis: no visible global function definition for 'time'
drawTimeAxis: no visible global function definition for 'box'
dwdays.default: no visible global function definition for 'time'
dwi.default: no visible global function definition for 'start'
dwi.default: no visible global function definition for 'end'
dwi.zoo: no visible global function definition for 'start'
dwi.zoo: no visible global function definition for 'end'
dwi.zoo: no visible global function definition for 'window'
dwi.zoo: no visible global function definition for 'time'
dwi.zoo: no visible global function definition for 'aggregate'
dwi.zoo: no visible global function definition for 'index'
extract.zoo: no visible global function definition for 'time'
fdc.data.frame: no visible global function definition for 'palette'
fdc.default: no visible global function definition for 'lines'
fdc.default: no visible global function definition for 'Axis'
fdc.default: no visible global function definition for 'abline'
fdc.default: no visible global function definition for 'legend'
fdc.matrix: no visible global function definition for 'palette'
fdc.matrix : <anonymous>: no visible global function definition for
  'points'
fdc.matrix: no visible global function definition for 'legend'
fdc.zoo: no visible global function definition for 'palette'
fdcu.data.frame: no visible global function definition for 'palette'
fdcu.default: no visible global function definition for 'polygon'
fdcu.default: no visible global function definition for 'lines'
fdcu.default: no visible global function definition for 'points'
fdcu.default: no visible global function definition for 'Axis'
fdcu.default: no visible global function definition for 'legend'
fdcu.default: no visible global function definition for 'abline'
fdcu.matrix: no visible global function definition for 'palette'
fdcu.matrix : <anonymous>: no visible global function definition for
  'lines'
fdcu.matrix : <anonymous>: no visible global function definition for
  'points'
fdcu.matrix: no visible global function definition for 'par'
fdcu.matrix: no visible global function definition for 'legend'
gists2spt: no visible global function definition for 'coordinates<-'
gists2spt: no visible global function definition for 'proj4string<-'
hydrokrige.data.frame: no visible global function definition for 'CRS'
hydrokrige.data.frame: no visible global function definition for
  'hasArg'
hydrokrige.data.frame: no visible global function definition for
  'proj4string<-'
hydrokrige.data.frame: no visible global function definition for
  'spsample'
hydrokrige.data.frame: no visible global function definition for
  'gridded<-'
hydrokrige.data.frame: no visible global function definition for
  'write.csv'
hydrokrige.data.frame: no visible global function definition for
  'write.csv2'
hydrokrige.default: no visible global function definition for 'CRS'
hydrokrige.default: no visible global function definition for 'hasArg'
hydrokrige.default: no visible global function definition for
  'proj4string<-'
hydrokrige.default: no visible global function definition for
  'spsample'
hydrokrige.default: no visible global function definition for
  'gridded<-'
hydrokrige.default: no visible global function definition for 'overlay'
hydrokrige.default: no visible global function definition for 'as'
hydrokrige.default: no visible global function definition for
  'SpatialPoints'
hydrokrige.default: no visible global function definition for
  'layout.north.arrow'
hydrokrige.default: no visible global function definition for
  'layout.scale.bar'
hydrokrige.default: no visible global function definition for
  'colorRampPalette'
hydrokrige.default: no visible global function definition for 'dev.set'
hydrokrige.default: no visible global function definition for
  'dev.list'
hydrokrige.default: no visible global function definition for 'dev.new'
hydropairs : panel.cor: no visible global function definition for 'par'
hydropairs : panel.cor: no visible global function definition for 'cor'
hydropairs : panel.cor: no visible global function definition for
  'strwidth'
hydropairs : panel.cor: no visible global function definition for
  'cor.test'
hydropairs : panel.cor: no visible global function definition for
  'symnum'
hydropairs : panel.cor: no visible global function definition for
  'text'
hydropairs : panel.hist: no visible global function definition for
  'par'
hydropairs : panel.hist: no visible global function definition for
  'hist'
hydropairs : panel.hist: no visible global function definition for
  'rect'
hydropairs: no visible global function definition for 'pairs'
hydropairs: no visible binding for global variable 'panel.smooth'
hydroplot: no visible global function definition for 'time'
hydroplot: no visible global function definition for 'window'
hydroplot: no visible global function definition for 'par'
hypsometric: no visible global function definition for 'plot.stepfun'
hypsometric: no visible global function definition for 'ecdf'
hypsometric: no visible global function definition for 'plot'
hypsometric: no visible global function definition for 'Axis'
hypsometric: no visible global function definition for 'splinefun'
hypsometric: no visible global function definition for 'integrate'
hypsometric: no visible global function definition for 'legend'
izoo2rzoo.default: no visible global function definition for 'start'
izoo2rzoo.default: no visible global function definition for 'end'
izoo2rzoo.zoo: no visible global function definition for 'start'
izoo2rzoo.zoo: no visible global function definition for 'end'
izoo2rzoo.zoo: no visible global function definition for 'time'
izoo2rzoo.zoo: no visible global function definition for 'time<-'
izoo2rzoo.zoo: no visible global function definition for 'window'
ma.default: no visible global function definition for 'filter'
matrixplot: no visible global function definition for
  'colorRampPalette'
matrixplot: no visible global function definition for 'levelplot'
monthlyfunction.data.frame: no visible global function definition for
  'start'
monthlyfunction.data.frame: no visible global function definition for
  'end'
monthlyfunction.data.frame: no visible global function definition for
  'time'
monthlyfunction.zoo: no visible global function definition for 'time'
monthlyfunction.zoo: no visible global function definition for
  'aggregate'
mspplot: no visible global function definition for 'CRS'
mspplot: no visible global function definition for 'colorRampPalette'
mspplot: no visible global function definition for 'coordinates<-'
mspplot: no visible global function definition for 'proj4string<-'
mspplot: no visible global function definition for 'SpatialPoints'
mspplot: no visible global function definition for 'layout.north.arrow'
mspplot: no visible global function definition for 'layout.scale.bar'
seasonalfunction.zoo: no visible global function definition for 'time'
seasonalfunction.zoo: no visible global function definition for
  'aggregate'
smry.default: no visible global function definition for 'IQR'
smry.default: no visible global function definition for 'sd'
smry.zoo: no visible global function definition for 'time'
sname2plot: no visible global function definition for 'window'
sname2ts: no visible global function definition for 'window'
subdaily2daily.data.frame: no visible global function definition for
  'time'
subdaily2daily.zoo: no visible global function definition for 'time'
zoo2RHtest: no visible global function definition for 'time'
zoo2RHtest: no visible global function definition for 'write.table'
Undefined global functions or variables:
  Axis CRS IQR SpatialPoints abline aggregate as axis box boxplot
  colorRampPalette coordinates<- cor cor.test dev.list dev.new dev.set
  ecdf end filter gridded<- hasArg hist index integrate layout
  layout.north.arrow layout.scale.bar legend levelplot lines overlay
  pairs palette panel.smooth par plot plot.stepfun plot.xts points
  polygon proj4string<- rect sd splinefun spsample start strwidth
  symnum text time time<- window write.csv write.csv2 write.table
  xy.coords
Consider adding
  importFrom("grDevices", "colorRampPalette", "dev.list", "dev.new",
             "dev.set", "palette", "xy.coords")
  importFrom("graphics", "Axis", "abline", "axis", "box", "boxplot",
             "hist", "layout", "legend", "lines", "pairs",
             "panel.smooth", "par", "plot", "points", "polygon", "rect",
             "strwidth", "text")
  importFrom("methods", "as", "hasArg")
  importFrom("stats", "IQR", "aggregate", "cor", "cor.test", "ecdf",
             "end", "filter", "integrate", "plot.stepfun", "sd",
             "splinefun", "start", "symnum", "time", "window")
  importFrom("utils", "write.csv", "write.csv2", "write.table")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').