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Re: replace integration by summation [message #84953 is a reply to message #84945]

Wed, 19 June 2013 13:05

fd_luni
Messages: 66
Registered: January 2013

Member

> But when you took Mats's suggestion and computed INT_TABULATED(t,A1), was the single value zero or not?

No it was not a single value zero.

I had two function like this:
For i=1,n-1 do begin
A2= INT_TABULATED(t[0:i], A1[0:i])
B2= INT_TABULATED(t[0:i], B1[0:i])
endfor

When I replaced the INT_TABULATED by this:
A2 = (t[1]-t[0])*total(A1,/cumulative)
B2 = (t[1]-t[0])*total(B1,/cumulative)

The function A2 = (t[1]-t[0])*total(A1,/cumulative)
gives me completely different values from A2= INT_TABULATED(t[0:i], A1[0:i]). But the function B2 = (t[1]-t[0])*total(B1,/cumulative gives me zeros.

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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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