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Re: what is the highest subscript in the array?!? [message #70852 is a reply to message #70774]

Fri, 07 May 2010 08:37

eddie
Messages: 1
Registered: May 2010

Junior Member

> PS: Right before I posted this, I searched and I figured that
> array[[-1]] should return the highest array value... but it doesn't,
> and I'm still stumped.

Add a 'u' and it should. A negative unsigned number "wraps" to
produce a large number.

IDL> array = indgen(10)
IDL> print,array[[-1u]]
9
This is similar to Carsten's huge number as an index. You can use
array[[-1ull]] if you are concerned that your array might have more
than a gajillion elements.

Unfortunately this trick only works for the last element, array[[-2u]]
still returns the last element of the array, not the second to last.

Cheers,
eddie

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[Message index]

		what is the highest subscript in the array?!? By: munka on Thu, 06 May 2010 19:12
		Re: what is the highest subscript in the array?!? By: munka on Fri, 07 May 2010 19:09
		Re: what is the highest subscript in the array?!? By: penteado on Fri, 07 May 2010 12:05
		Re: what is the highest subscript in the array?!? By: munka on Fri, 07 May 2010 11:51
		Re: what is the highest subscript in the array?!? By: munka on Fri, 07 May 2010 11:46
		Re: what is the highest subscript in the array?!? By: eddie on Fri, 07 May 2010 08:37
		Re: what is the highest subscript in the array?!? By: wlandsman on Fri, 07 May 2010 03:35
		Re: what is the highest subscript in the array?!? By: wlandsman on Fri, 07 May 2010 03:20
		Re: what is the highest subscript in the array?!? By: Carsten Lechte on Fri, 07 May 2010 02:34
		Re: what is the highest subscript in the array?!? By: R.G.Stockwell on Thu, 06 May 2010 22:39
		Re: what is the highest subscript in the array?!? By: Giuseppe Papa on Sat, 15 October 2011 11:57

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