dset ^precip.1x1.dat   
undef -999.0
title CMAP(ocean) + CPC-URD(land)
*  
ydef 181 linear -90.000000 1
xdef 360 linear 0.000000 1.000000
tdef 700 linear jan1982 1mo
zdef 1 linear 1 1
vars 1
p  0 81,1,0  ** precip (mm/month)
ENDVARS