[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

*Subject*: Vectorization question*From*: "Liam E. Gumley" <Liam.Gumley(at)ssec.wisc.edu>*Date*: Mon, 11 Sep 2000 16:51:01 -0500*Newsgroups*: comp.lang.idl-pvwave*Organization*: Space Science and Engineering Center, UW-Madison*Xref*: news.doit.wisc.edu comp.lang.idl-pvwave:21360

Given the following arrays a = intarr(10) x = [2, 2, 2, 3, 3, 4] b = [1, 3, 4, 2, 1, 8] How would I vectorize the following operation for i = 0, n_elements(x) - 1 do a[x[i]] = a[x[i]] + b[i] To achieve this result print, a, format='(10i4)' 0 0 8 3 8 0 0 0 0 0 In the real-world case where this occurs, I need to repeat this kind of operation several hundred times, where the size of 'a' is around 1,000,000 and the size of 'x' is around 100,000 ('a' and 'b' are float type in the real-world case). Many thanks for any suggestions. Cheers, Liam. http://cimss.ssec.wisc.edu/~gumley

**Follow-Ups**:**Re: Vectorization question***From:*Liam E. Gumley

**Re: Vectorization question***From:*Pavel Romashkin

**Re: Vectorization question***From:*Liam E. Gumley

- Prev by Date:
**Re: IDLgrROI and normalized coords** - Next by Date:
**Re: Vectorization question** - Prev by thread:
**Re: Finding all max/min of a graph** - Next by thread:
**Re: Vectorization question** - Index(es):