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Re: Cumulative total [message #12840 is a reply to message #12828]

Fri, 18 September 1998 00:00

eddie haskell
Messages: 29
Registered: September 1998

Junior Member

> Can anyone suggest a more efficient way to compute the running cumulative
> total of a 1-D array than using FOR loops?

here is the way i do it:

IDL> A = findgen(10)
IDL> N = n_elements(A)
IDL> result = A # (lindgen(N,N) ge transpose(lindgen(N,N)))
IDL> print,result
0.00000
1.00000
3.00000
6.00000
10.0000
15.0000
21.0000
28.0000
36.0000
45.0000

cheers,
eddie

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| / | A. G. Edward Haskell | \
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| / | Center for Coastal Physical Oceanography | \
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[Message index]

		Re: Cumulative total By: bowman on Fri, 18 September 1998 00:00
		Re: Cumulative total By: Andy Loughe on Fri, 18 September 1998 00:00
		Re: Cumulative total By: eddie haskell on Fri, 18 September 1998 00:00

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