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Re: replace integration by summation [message #84981 is a reply to message #84972]

Thu, 20 June 2013 09:28

Phillip Bitzer
Messages: 223
Registered: June 2006

Senior Member

> There is any other way to avoid the loop in INT_TABULATED function? It seems that my idea to use cumulative it doesn't work.

Well, it didn't work the way you've implemented it. Take a look at those notes I posted. You answer is there, assuming the trapezoidal (or rectangle) method works for your data. Look at eq (5.17) and the associated code below. Add a /CUMULATIVE to that command, and this should be what you're looking for.

Again, these methods of integration are not the same as used by INT_TABULATED and will not (in general) give you the same answers.

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[Message index]

		replace integration by summation By: fd_luni on Tue, 18 June 2013 03:36
		Re: replace integration by summation By: Helder Marchetto on Tue, 18 June 2013 03:56
		Re: replace integration by summation By: fd_luni on Tue, 18 June 2013 07:13
		Re: replace integration by summation By: Craig Markwardt on Tue, 18 June 2013 09:04
		Re: replace integration by summation By: Phillip Bitzer on Tue, 18 June 2013 09:17
		Re: replace integration by summation By: David Fanning on Tue, 18 June 2013 09:37
		Re: replace integration by summation By: Phillip Bitzer on Tue, 18 June 2013 11:46
		Re: replace integration by summation By: David Fanning on Tue, 18 June 2013 11:56
		Re: replace integration by summation By: David Fanning on Tue, 18 June 2013 11:59
		Re: replace integration by summation By: fd_luni on Wed, 19 June 2013 02:01
		Re: replace integration by summation By: Paul Van Delst[1] on Wed, 19 June 2013 05:08
		Re: replace integration by summation By: fd_luni on Wed, 19 June 2013 05:55
		Re: replace integration by summation By: Mats Löfdahl on Wed, 19 June 2013 06:02
		Re: replace integration by summation By: fd_luni on Wed, 19 June 2013 06:09
		Re: replace integration by summation By: Craig Markwardt on Wed, 19 June 2013 09:29
		Re: replace integration by summation By: fd_luni on Wed, 19 June 2013 13:05
		Re: replace integration by summation By: Phillip Bitzer on Wed, 19 June 2013 14:04
		Re: replace integration by summation By: Paul Van Delst[1] on Wed, 19 June 2013 14:20
		Re: replace integration by summation By: Craig Markwardt on Wed, 19 June 2013 21:06
		Re: replace integration by summation By: fd_luni on Thu, 20 June 2013 03:12
		Re: replace integration by summation By: fd_luni on Thu, 20 June 2013 04:10
		Re: replace integration by summation By: Phillip Bitzer on Thu, 20 June 2013 09:28
		Re: replace integration by summation By: Paul Van Delst[1] on Thu, 20 June 2013 07:11
		Re: replace integration by summation By: Fabzi on Tue, 18 June 2013 09:42
		Re: replace integration by summation By: Phillip Bitzer on Tue, 18 June 2013 11:47

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