dset /cpc/home/wd52vk/samer/fronts/t925-SA-y1980-2009 title R1 925-hPa temperature (deg C) undef -999. missing_value xdef 29 linear -90. 2.5 ydef 29 linear -55. 2.5 zdef 1 linear 0 1 tdef 10958 linear 1jan1980 1dy vars 1 t925 0 99 R1 925-hPa temperature (deg C) endvars