Re: Simple number formatting problem

[davidf(at)dfanning.com (David Fanning)]

Simon de Vet (simon@mathstat.dal.ca) writes:

> Trivial problem, no doubt, but I've never been able to get my brane
> around formatting options.
> 
> I have a list of files, with the extension .01, .02, .03 ... .12. The
> preceding portion is indentical in all cases.
> 
> I'd like to be able to load these in a loop, but I first need to convert
> the counter value into this format.
> 
> My current, and very ugly, technique is to have an array filled with
> ['01', '02', ... '12'], and then reference the appropriate entry. It
> works, but I don't like it.

I'd try something like this:

   IDL> base = 'myfile'
   IDL> ext = '.dat'
   IDL> for j=1,12 do print, base + String(j, Format="(I2.2)") + ext

Cheers,

David

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David Fanning, Ph.D.
Fanning Software Consulting
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