IF the latitudes are the same at all i, and the longitudes are the same at all j, you can define coordinate axes from one line of the lon,lat grids:
yes? DEFINE AXIS/X/units=degrees_east lon_axis = lon[j=1]
yes? DEFINE AXIS/Y/units=degrees_north lat_axis = lat[i=1]
Now there are several ways to think of a "monthly axis". Is this model data? What calendar did they use? Some use a 360-day calendar with 30-day months. Others may use a Gregorian calendar, or one with leap years, but not making other corrections. Here's one way to do it, with the standard Proleptic Gregorian calendar and equal-length months (we could set /units= or /t0= but I've let Ferret set those using its defaults).
yes? DEFINE AXIS/T=1-jan-1999:31-dec-2008/edges/npoints=120 time_axis
yes? list t[gt=time_axis]
Then you can define a sst variable on these axes, and Ferret plots will be labeled with longitude, latitude and time.
yes? LET/TITLE="Sea Surface Temperature"/UNITS="degC" sst2 = sst[gx=lon_axis@asn,gy=lat_axis@asn,gt=time_axis@asn]
On 8/7/2014 5:20 PM, Molulaqhooa Maoyi wrote: