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Re: Array of arrays [message #47709 is a reply to message #12759]

Thu, 23 February 2006 08:31

Fritz
Messages: 7
Registered: February 2006

Junior Member

One (hopefully) last question...

I have the following code:

nb_classes = 3
references = ptrarr(nb_classes)
for i=0, nb_classes-1 do begin
nb_samples = 5
list_samples = ptrarr(nb_samples)
for j=0, nb_samples-1 do begin
data = indgen(21,19,4)
list_samples[j] = ptr_New(data)
endfor
references[i] = ptr_new(list_samples)
endfor

This code is simplified because for each class, the number of samples may
vary and also the size of data.

The question is:
How do I retrieve the data, let say, for sample 3 of class 2 ?

In the previous example,
> t = PtrArr(3)
> t[0] = Ptr_New(intarr(2,5,4))
> t[1] = Ptr_New(intarr(6,5,4))
> t[2] = Ptr_New(intarr(7,8,4))

(*t[1]) allows to acces the second element
(*t[1])[*,*,2] allows to acces the third band of the second element.

But in the code above ?
I tried
> dat = (*references[0])[(*liste_samples[1])]
but dat is not the same as data.

Fran�ois, who spend much time on something that may appear very simple to
others...

"David Fanning" <davidf@dfanning.com> wrote in message
news:MPG.1e677a7dc69e8a26989ba0@news.frii.com...
> Fritz writes:
>
>> What happens if I save the array T ?
>>
>>> save, filename='Tarray.sav', T
>>
>> Does the content of T is saved ? I mean do the three arrays inside T are
>> saved ?
>> Does the restore command
>>> restore, 'Tarray.sav'
>> brings back the initial information ?
>
> I take it you are not an empiricist. :-)
>
> Yes, everything is saved and restored properly.
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		ARRAY OF ARRAYS By: dsheerin on Fri, 04 September 1998 00:00
		Re: Array of arrays By: David Fanning on Fri, 24 February 2006 07:52
		Re: Array of arrays By: edward.s.meinel@aero. on Fri, 24 February 2006 07:46
		Re: Array of arrays By: David Fanning on Thu, 23 February 2006 08:53
		Re: Array of arrays By: Fritz on Thu, 23 February 2006 08:31
		Re: Array of arrays By: David Fanning on Thu, 23 February 2006 06:54
		Re: Array of arrays By: Fritz on Thu, 23 February 2006 06:31
		Re: Array of arrays By: David Fanning on Wed, 22 February 2006 13:58

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