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Re: Oooh...! It's harder than I thought!! To get average of each line using only meaningful data [message #54948 is a reply to message #54947]

Tue, 24 July 2007 08:40

edward.s.meinel@aero. is currently offline

edward.s.meinel@aero.
Messages: 52
Registered: February 2005

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On Jul 24, 8:47 am, Conor <cmanc...@gmail.com> wrote:
>
> totals = total(data_arr,1)/total(data_arr<1,1)
>
> total(data_arr,1) returns a row vector where each element is the total
> of a single line of data. total(data_arr<1,1) does essentially the
> same thing, but first it imposes a ceiling on the array, so that no
> value is greater than 1. Then, when you total across a line, what you
> get is the total number of non-zero elements.

Very clever, Conor! It just needs one small change: You have assumed
that the total number of non-zero elements is, well, non-zero. If
there are no non-zero elements, it will choke, so just do,

totals = total(data_arr,1)/(total(data_arr<1,1) > 1)

I use the */(* > 1) trick quite frequently.

Ed

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[Message index]

		Re: Oooh...! It's harder than I thought!! To get average of each line using only meaningful data By: Conor on Tue, 24 July 2007 08:52
		Re: Oooh...! It's harder than I thought!! To get average of each line using only meaningful data By: edward.s.meinel@aero. on Tue, 24 July 2007 08:40
		Re: Oooh...! It's harder than I thought!! To get average of each line using only meaningful data By: Conor on Tue, 24 July 2007 05:47
		Re: Oooh...! It's harder than I thought!! To get average of each line using only meaningful data By: weitkamp on Tue, 24 July 2007 02:47
		Re: Oooh...! It's harder than I thought!! To get average of each line using only meaningful data By: Ingo von Borstel on Tue, 24 July 2007 01:32

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