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Re: Set Operations on A and B [message #45793 is a reply to message #45700]

Mon, 03 October 2005 07:57

btt
Messages: 345
Registered: December 2000

Senior Member

mxd1007@cs.rit.edu wrote:

> which refers to Colorclass[h]. So I guess since this is only a
> numerical value, I need to somehow convert it to an array.
> ColorClass[h] is the set of vertices with color h, and is constructed
> as follows:
>
> ColorClass[h] = {i is an element of the set of vertices : color[i] = h}
> for 0 <= h <= k-1
>

Hi,

My first guess is that IDL is changing your selection from a subset of
an array to a scalar. This happens when you extract one element from an
array. Use REFORM to force IDL to treat your value as an array of one
element.

IDL> ColorClass = BINDGEN(12)
IDL> i = 7

Now extract the ith element - raw and reformed...

IDL> help, ColorClass[i], REFORM(ColorClass[i],1)
<Expression> BYTE = 7
<Expression> BYTE = Array[1]

Try it with your set operators.

Cheers,
Ben

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[Message index]

		Set Operations on A and B By: mxd1007 on Sat, 01 October 2005 20:30
		Re: Set Operations on A and B By: btt on Mon, 03 October 2005 07:57
		Re: Set Operations on A and B By: mxd1007 on Fri, 07 October 2005 18:22
		Re: Set Operations on A and B By: mxd1007@cs.rit.edu on Sun, 02 October 2005 18:36
		Re: Set Operations on A and B By: btt on Mon, 10 October 2005 06:46

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