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How can I integrate? (easy question?) [message #2]

Wed, 20 March 1991 04:37

bdb112
Messages: 3
Registered: March 1991

Junior Member

How can I efficiently do a running sum of a vector (integrate)? The explicitly
coded version (IDL v2)
for i=1,n-1 x(i)=x(i) + x(i-1) achieves the desired effect, but takes (VS3100)
1 second for a 2000 element array compared to .01 sec for z=x+x, a similar
number of operations. This is such an obvious thing to do that I must be
missing something obvious - I can't find it in the userlib either (just
deriv).

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[Message index]

		How can I integrate? (easy question?) By: bdb112 on Wed, 20 March 1991 04:37
		Re: How can I integrate? (not so easy?) By: bdb112 on Mon, 25 March 1991 12:18
		Re: How can I integrate? (easy question?) By: ramesh on Mon, 25 March 1991 09:33
		Re: How can I integrate? (easy question?) By: bruce on Thu, 21 March 1991 16:22

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