.schechter.fit.dat: no visible global function definition for 'optim'
.schechter.fit.dat: no visible global function definition for 'nlminb'
.schechter.fit.dat: no visible global function definition for 'qchisq'
aaxis: no visible global function definition for 'par'
aaxis: no visible global function definition for 'axTicks'
aaxis: no visible global function definition for 'axis'
aaxis: no visible global function definition for 'strwidth'
abox: no visible global function definition for 'box'
acb: no visible global function definition for 'hsv'
acb: no visible global function definition for 'par'
acb: no visible global function definition for 'plot'
acb: no visible global function definition for 'strheight'
acb: no visible global function definition for 'strwidth'
acb: no visible global function definition for 'mtext'
acol: no visible global function definition for 'col2rgb'
acol: no visible global function definition for 'rgb'
age : <anonymous>: no visible global function definition for
  'integrate'
angdist : <anonymous>: no visible global function definition for
  'integrate'
angsize : <anonymous>: no visible global function definition for
  'integrate'
aplot: no visible global function definition for 'hsv'
aplot: no visible global function definition for 'par'
aplot: no visible global function definition for 'plot'
aplot: no visible global function definition for 'points'
aplot: no visible global function definition for 'rect'
aplot: no visible global function definition for 'mtext'
aplot: no visible global function definition for 'strheight'
aplot: no visible global function definition for 'strwidth'
aqbeta: no visible global function definition for 'pnorm'
aqbeta : aqb: no visible global function definition for 'qbeta'
cardinal: no visible global function definition for 'par'
cardinal: no visible global function definition for 'strheight'
cardinal: no visible global function definition for 'arrows'
chicdf: no visible global function definition for 'pgamma'
comovdist.los : <anonymous>: no visible global function definition for
  'integrate'
comovdist.trans : <anonymous>: no visible global function definition
  for 'integrate'
comovvol : <anonymous>: no visible global function definition for
  'integrate'
concen: no visible global function definition for 'qgamma'
convmu: no visible global function definition for 'qgamma'
convrad: no visible global function definition for 'qgamma'
coscalc : temp : <anonymous>: no visible global function definition for
  'integrate'
gauss: no visible global function definition for 'integrate'
h2re: no visible global function definition for 'qgamma'
igamma: no visible global function definition for 'pgamma'
kron: no visible global function definition for 'qgamma'
kronrad: no visible global function definition for 'qgamma'
label: no visible global function definition for 'par'
label: no visible global function definition for 'strwidth'
label: no visible global function definition for 'strheight'
label: no visible global function definition for 'rect'
label: no visible global function definition for 'text'
lookback : <anonymous>: no visible global function definition for
  'integrate'
lumdist : <anonymous>: no visible global function definition for
  'integrate'
petro : temp: no visible global function definition for 'qgamma'
petroindex: no visible global function definition for 'qgamma'
petrorad : temp: no visible global function definition for 'qgamma'
plotfits: no visible global function definition for 'rgb'
plotfits: no visible global function definition for 'hsv'
plotfits: no visible global function definition for 'png'
plotfits: no visible global function definition for 'bitmap'
plotfits: no visible global function definition for 'setEPS'
plotfits: no visible global function definition for 'postscript'
plotfits: no visible global function definition for 'pdf'
plotfits: no visible global function definition for 'par'
plotfits: no visible global function definition for 'image'
plotfits: no visible global function definition for 'graphics.off'
re2h: no visible global function definition for 'qgamma'
scalemark: no visible global function definition for 'par'
scalemark: no visible global function definition for 'axTicks'
scalemark: no visible global function definition for 'strheight'
scalemark: no visible global function definition for 'lines'
schechter: no visible global function definition for 'integrate'
scmean: no visible global function definition for 'sd'
sersic: no visible global function definition for 'qgamma'
sersic: no visible global function definition for 'pgamma'
shade: no visible global function definition for 'hsv'
shade: no visible global function definition for 'polygon'
shadowtext: no visible global function definition for 'xy.coords'
shadowtext: no visible global function definition for 'strwidth'
shadowtext: no visible global function definition for 'strheight'
shadowtext: no visible global function definition for 'text'
Undefined global functions or variables:
  arrows axTicks axis bitmap box col2rgb graphics.off hsv image
  integrate lines mtext nlminb optim par pdf pgamma plot png pnorm
  points polygon postscript qbeta qchisq qgamma rect rgb sd setEPS
  strheight strwidth text xy.coords
Consider adding
  importFrom("grDevices", "bitmap", "col2rgb", "graphics.off", "hsv",
             "pdf", "png", "postscript", "rgb", "setEPS", "xy.coords")
  importFrom("graphics", "arrows", "axTicks", "axis", "box", "image",
             "lines", "mtext", "par", "plot", "points", "polygon",
             "rect", "strheight", "strwidth", "text")
  importFrom("stats", "integrate", "nlminb", "optim", "pgamma", "pnorm",
             "qbeta", "qchisq", "qgamma", "sd")
to your NAMESPACE file.