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Re: Maximum index for arrays? [message #62559]

Mon, 15 September 2008 06:38

pgrigis
Messages: 436
Registered: September 2007

Senior Member

hotplainrice@gmail.com wrote:
> Hi guys,
>
> Thanks for helping me for the past few weeks. I've managed to get
> CUBLAS and other CUDA programs working in IDL. What I have now for you
> guys is this.
>
> Here is the code
>
> N = 181
> N2 = N^2
> a = fltarr(N2, 141)
> help,a
>
> A FLOAT = Array[32761, 141]
>
> N = 182
> N2 = N^2
> a = fltarr(N2, 141)
> % Array dimensions must be greater than 0
> % Execution halted at: TEST 5 /home/hpr/test.pro
> % $MAIN$
> IDL>
>
> How big can the index go? Its because I need N = 100 to 1000

Just for the records, IDL 32-bit can have arrays with a maximum of
about
2^31/N elements, where N is the size in byte of one element (i.e. 1
for bytes,
2 for int, 4 for long int and floats, etc. etc.).

On the orther hand, IDL 64 bits can (in principle) allocate arrays so
large that you won't be able to store them anyway (at least for the
next
few years or so)

Cheers,
Paolo

>
> Regards
> Zaki

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[Message index]

		Re: Maximum index for arrays? By: pgrigis on Mon, 15 September 2008 06:38
		Re: Maximum index for arrays? By: hotplainrice@gmail.co on Mon, 15 September 2008 03:15
		Re: Maximum index for arrays? By: Chris[6] on Mon, 15 September 2008 01:53

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