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Indexing problems under V6 [message #53195]

Fri, 30 March 2007 02:41

Ian Dean
Messages: 26
Registered: January 2000

Junior Member

Hi,
This is almost a repeat of a psoting by Wayne Landsman, 12-Aug-2003.
Because of contracts, we have been stuck on v5.5 for years!!!
However, we are now in a position to upgrade to 6.3. As part of this, a
great deal of our code is now broken because of the change in indexing.
In 5.5,
a={x:indgen(10)}
b=[1, 4, 10]
c=[4]
val=a.x[c] <<<<<<<<<<this was a scalar of 4
pos=where(b eq val) <<<<<<<<<<<<<< returned [1]

In 6.3.
a={x:indgen(10)}
b=[1, 4, 10]
c=[4]
val=a.x[c] <<<<<<<<<<this is now an array of [4]
pos=where(b eq val) <<<<<<<<<<<<<< now returns -1

The where fails because it is now comparing an array with an array, not an
array with a scalar.
Is there any trick/switch that can be used to revert the action to that used
in 5.5?

The real problem is much deeper than this, as the search may be done several
levels lower than where the selection criteria is setup and furthermore,
some searches genuinely use arrays.

I hope this makes sense and I hope for some favourable replies.

Regards,
Ian

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[Message index]

		Indexing problems under V6 By: Ian Dean on Fri, 30 March 2007 02:41
		Re: Indexing problems under V6 By: MarioIncandenza on Sat, 31 March 2007 13:27
		Re: Indexing problems under V6 By: JD Smith on Mon, 02 April 2007 14:48

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