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Re: How to find the pixel position [message #70677 is a reply to message #70640]

Thu, 29 April 2010 11:42

Aram Panasenco
Messages: 41
Registered: April 2010

Member

Chris wrote:
>
>> Note that the WHERE function returns one-dimensional subscripts. You can
>> convert them back to two-dimensional subscripts (if you need to) using
>> the ARRAY_INDICES function:
>>
>> rectIndices = array_indices([1024,1024],findIndices,/dimensions)
>
>
> Can anyone enlighten me about whether there's any advantage to using
> the /dimensons keyword in array_indices? I hear people claim it's to
> prevent passing big arrays around, but those big arrays would be
> passed by reference, yes? In which case that wouldn't be a problem
>
> chris
>

In IDL, it is _usually_ a bad idea to pass a variable that you don't
want modified into a routine, because it is so easy for the routine to
change it. Now, array_indices() does not do that for a fact, but for me
personally it's just a matter of consistency.

~Aram Panasenco

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[Message index]

		How to find the pixel position By: sid on Mon, 26 April 2010 22:16
		Re: How to find the pixel position By: Aram Panasenco on Thu, 29 April 2010 12:46
		Re: How to find the pixel position By: sid on Thu, 29 April 2010 23:30
		Re: How to find the pixel position By: Aram Panasenco on Thu, 29 April 2010 11:42
		Re: How to find the pixel position By: jeanh on Thu, 29 April 2010 08:18
		Re: How to find the pixel position By: d.poreh on Thu, 29 April 2010 03:22
		Re: How to find the pixel position By: Timm Weitkamp on Thu, 29 April 2010 02:49
		Re: How to find the pixel position By: sid on Thu, 29 April 2010 01:50
		Re: How to find the pixel position By: d.poreh on Thu, 29 April 2010 00:06

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