Time problem

[Henrique Barbosa]

Cottet,

Your sintax is wrong, you can't do

ga-> d mrso.3(t=1,t=1200) - mrso.1(t=1,t=1200)

You should try:

ga-> set t 1 1200
ga-> d mrso.3 - mrso.1

Take a look at the Grads tutorial:

http://grads.iges.org/grads/gadoc/tutorial.html

cheers,

Henrique

On 5/16/06, Cottet, Loic (IFPRI) <l.cottet at cgiar.org> wrote:
> Hi,
>
> I am trying to operate a difference between 2 files,
> when it comes to be the same time it is done easily but when I want the
> difference over a long period of time it is not done.
>
> ga-> d mrso.3(t=1) - mrso.1(t=1)
> Contouring: -3500 to 0 interval 500
> ga-> d mrso.3(t=1,t=1200) - mrso.1(t=1,t=1200)
> Syntax Error: Invalid dimension expression
>   Same dimension specified multiple times for variable = mrso.3
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression
>   Expression = mrso.3(t=1,t=1200)-mrso.1(t=1,t=1200)
>
>
> can anyone help me?
>
> Thanks a lot,
>