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Re: About 2D array index [message #62008]

Fri, 15 August 2008 04:19

Juggernaut
Messages: 83
Registered: June 2008

Member

On Aug 14, 10:26 pm, xiao <littledd...@gmail.com> wrote:
> On Aug 14, 9:13 pm, David Fanning <n...@dfanning.com> wrote:
>
>
>
>> xiao writes:
>>> Can any one tell me how the index arranged? For example, An array
>>> like this :
>
>>> 10 13 14
>>> 59 13 20
>>> 45 9 12
>
>>> Is the index like this?
>
>>> 0 1 2
>>> 3 4 5
>>> 6 7 8
>
>>> Thank you~
>>> Actually , I tried to print the index and the result is like above but
>>> when I tried to large 2D array, it seems it is not right..........
>
>> It's right. :-)
>
>> Cheers,
>
>> David
>
>> --
>> David Fanning, Ph.D.
>> Fanning Software Consulting, Inc.
>> Coyote's Guide to IDL Programming:http://www.dfanning.com/
>> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
>
> Thank you David~ :)

For a large array the type of array you are using may not have enough
numbers to reach the end.
If you use indgen(258, /byte) then the last two numbers in the array
will be 0 and 1 since it will cycle
back on itself seeing as how the limit of a number of type byte is 255.

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[Message index]

		Re: About 2D array index By: Juggernaut on Fri, 15 August 2008 04:19
		Re: About 2D array index By: xiao zhang on Thu, 14 August 2008 19:26
		Re: About 2D array index By: David Fanning on Thu, 14 August 2008 19:13

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