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Re: Strange array division problem [message #66294 is a reply to message #66293]

Mon, 04 May 2009 16:35

cgguido
Messages: 195
Registered: August 2005

Senior Member

On May 4, 4:42 pm, David Klassen <klas...@rowan.edu> wrote:
> I'm trying to create an array by reading in 2-d data and putting into
> planes in a 3-d array, however, some of the data is redundant---the 2-
> d data would go into the same plane. In these cases, I want to
> average them so I figure I can just add the data to the current plane
> value, keeping track of how many data arrays go into each plane, then
> just divide the final 3-d array by these counts. But I'm stuck on how
> exactly to implement that.
>
> My 3-d array X columns, Y rows, Z planes and the 2-d array is Z
> columns by Y rows (so I'm "rotating" the data and "sliding" each one
> into a column of the 3-d array---I hope that makes sense). I then
> have a vector, xcounts, that is X elements long and as data go into
> the columns, I increment xcounts[X].
>
> So, when I'm done populating the 3-d array I need to divide each row
> in each plane by the vector xcounts. Is there an easy way to do this
> that doesn't involve me looping through all the points?

how about:

a3d /= rebin(xcounts,z,y,x)

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[Message index]

		Re: Strange array division problem By: David Fanning on Wed, 06 May 2009 20:08
		Re: Strange array division problem By: David Klassen on Wed, 06 May 2009 19:03
		Re: Strange array division problem By: cgguido on Tue, 05 May 2009 14:23
		Re: Strange array division problem By: David Fanning on Tue, 05 May 2009 06:07
		Re: Strange array division problem By: David Klassen on Tue, 05 May 2009 05:44
		Re: Strange array division problem By: cgguido on Mon, 04 May 2009 16:52
		Re: Strange array division problem By: cgguido on Mon, 04 May 2009 16:35

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