Grid Information

[Graham Gladman <swr97gjg@xxxxxxxxxxxxxxxxx>]

Ferreteers,

If I have a field defined on an (x,y,z,t) grid with number of points
(nx,ny,nz,nt) how do I get at the x-coordinate coressponding to the i-th
co-ordinate on the x-axis?

For example, if I plot say SST along the line i=35 but in my title I
require the longitude (x) at i=35 (where 35 for example corresponds to
50E) how do I get at it. Something like:

fill /i=35/l=30/set_up sst	! Ignore l command qualifier
ppl title "x[i=35]"		! I want my title to be '50E'
ppl fill

doesn't seem to work. In this case my title comes out at '35'. This should
be trivial but I can't seem to find the answer.

Thanks in advance,

Graham Gladman