comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Filling an array

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Filling an array [message #23294]

Wed, 17 January 2001 17:06

Pavel A. Romashkin
Messages: 531
Registered: November 2000

Senior Member

If I have

a = findgen(10)
b = fix(100* randomu(10, 10))
; N_elements(a) is equal to n_elements(b)
c = findgen(total(b))

how can I fill C with values from A using B as a running index, so that

c[0 : b[0]-1] = a[0]
c[b[0] : b[0]+b[1]-1] = a[1]

etc, without looping through "n_elements(b)-1" iterations?
I have a fast solution with a loop and indexing using total(/cumulative)
and a very slow one with loop and replicate, but I can't come up with a
loop-free one.

Thank you,
Pavel

Report message to a moderator

[Message index]

Filling an array

By: Pavel A. Romashkin on Wed, 17 January 2001 17:06

Previous Topic:	Re: 24 vs 8 bit color systems
Next Topic:	Re: Newbie question (w/colorful points)...

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Nov 29 11:58:06 PST 2025

Total time taken to generate the page: 0.39908 seconds