Re: How to do loop in ferret?

[Steve Hankin <hankin@xxxxxxxxxxxxx>]

Hi Xin,

You can use an approach like
    let name = {"a","b","c","d"}
    repeat/i=1:4 GO sub_scrib name[i=`i`]

This passes the string (e.g.) "name[i=2]" to sub_scrib.  To pass the
*value*
you could use the more elaborate approach
    repeat/i=1:4 (define symbol ii `i`; GO sub_scrib `name[i=($ii)]`)

You can test this quickly using the SAY alias
    repeat/i=1:4 (define symbol ii `i`;SAY `name[i=($ii)]`)

    - steve

=========================

Xin Jin wrote:

> Hi Ferreters,
>
> I have a question about  how to do loop in ferret. For example:
>
> I have defined four regions and assigned them to a string array,
> Name[i=1:4] and I want to do the same things in each region.  But How
> to do it?
>
> It seems I cannot use repeat command to do it.
>
> repeat/i=1:4  (go  sub_scrib Name).
>
>
> Howhever I can do it one by one as
>
> go sub_scrib Name[i=1]
> go sub_scrib Name[i=2]
> go sub_scrib Name[i=3]
> go sub_scrib Name[i=4]
>
> Thanks
>
> Xin
>
> ________________________________________
>
> Xin Jin
> Inst.of Geophysics and Planetary Physics
> University of California Los Angeles
> 5845 Slichter Hall
> Los Angeles, CA 90095-4996, USA
> phone: (310) 825 4526
> fax  : (310) 206 3051
> email: xjin@igpp.ucla.edu
>
>

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