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array manipulation (TOTAL-ing or MEDIAN-ing) in uneven bins [message #82403]

Wed, 12 December 2012 08:16

havok2063
Messages: 24
Registered: December 2012

Junior Member

I have several unrelated problems that I'm solving in the same efficient way (with loops). I'm trying to perform some array operation on an array, according to a list of (let's call them) uneven bins.

I have an array, say d, of 146 elements. I have a separate array that represents uneven bins that I want to perform the operation on, like MEDIAN, or TOTAL. For example,

ntot = [15,45,56,90,116,146]

I want as output an array, of 6 elements, that contains the MEDIAN (or TOTAL) of array d according to the indices listed in ntot.

So the 1st element would contain median(d[0:14],/even), the 2nd median(d[15:44],/even), etc....

Or the same thing with total....total(d[0:14]), total(d[15:44]) , etc...

Right now I'm looping over the number of elements in ntot to do this and I don't much care for loops.

I don't think this is quite the same thing as the example given in the "Horror and Disgust of Histogram" article nor does this sound like something I can do with value_locate, although I'm not too familiar with value_locate.

Any ideas on this? Thanks a lot.

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[Message index]

		array manipulation (TOTAL-ing or MEDIAN-ing) in uneven bins By: havok2063 on Wed, 12 December 2012 08:16
		Re: array manipulation (TOTAL-ing or MEDIAN-ing) in uneven bins By: havok2063 on Thu, 13 December 2012 12:11
		Re: array manipulation (TOTAL-ing or MEDIAN-ing) in uneven bins By: Jeremy Bailin on Wed, 12 December 2012 14:19
		Re: array manipulation (TOTAL-ing or MEDIAN-ing) in uneven bins By: Jeremy Bailin on Wed, 12 December 2012 14:18
		Re: array manipulation (TOTAL-ing or MEDIAN-ing) in uneven bins By: Jeremy Bailin on Wed, 12 December 2012 14:03

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