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Re: Set Operations on A and B [message #45881 is a reply to message #45700]

Mon, 10 October 2005 06:46

btt
Messages: 345
Registered: December 2000

Senior Member

mxd1007@cs.rit.edu wrote:

>
> setA = {vertex0:[1,5,8],vertex1:[0,2,7],vertex2:[,3,6,7},$
> vertex3:[2,4,10],vertex4:[3,5,10],vertex5:[0,4,6,8],$
> vertex6:[2,5,9],vertex7:[1,2,9,10],vertex8:[0,5,9,10],$
> vertex9:[6,7,8,10],vertex10:[3,4,7,8,9]}
>
snip
>
> ;retrieve subarray from structure setA
> newSetA = setA.(i)
>
> sizeColorClass = SIZE(colorClass[h], /n_dimensions)
>
> WHILE( h LT k AND SetIntersection(newSetA, REFORM(colorClass[h],$
> sizeColorClass) NE -1) DO.........
>

Hello,

Two things, I think, will help here.

(1) You probably want change the call to size so that it returns a
vector of dimensions - not a scalar of the number of dimensions. I
think your REFORM statement will work if you do since it will work with

sizeColorClass = SIZE(colorClass[h], /dimensions)

(2) I would seriously be looking transforming this whole thing into an
object system. Make each vertex an object. Then you have two options
- have each vertex know something about its adjacency or have another
type of object provide supervision/navigation for you. I did something
similar with a quadtree object system a long time ago. Once I had my
head wrapped around the object part - the quadtree navigation was a
snap. And a bonus was waaaay less coding than that without objects.

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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