indices

[Vincent Le Fouest <vincent_lefouest@xxxxxxxxxx>]

Dear ferreters,

I have a 1D dataset of X levels (k=1:X)

I would like to do the average between the value of my variable at k and
its value at k-1 but I have difficulties to write a correct command in
the ferret language.

Hope you could bring me some help.

Bye,

Vincent