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Re: repeating elements of an array [message #89348 is a reply to message #89347]

Sun, 24 August 2014 13:09

dg86
Messages: 118
Registered: September 2012

Senior Member

On Sunday, August 24, 2014 12:42:53 PM UTC-4, Cleo Drakos wrote:
> Hi guys
>
>
>
> First I want to arrange two values (-50 and 40) in the range of 10, so that I get the following array:
>
>
>
> a = [-50 -40 -30 -20 -10 0 10 20 30 40]
>
> Now, I want to repeat each element of array 5 times so that I can get the following result:
>
>
>
> ans1 = [-50 -50 -50 -50 -50 -40 -40 ....40]
>
>
>
> I also want to repeat the whole array 5 times to get the following result:
>
>
>
> ans2 = [-50 -40 -30 -20 -10 0 10 20 30 40 -50 -40 -30 -20 -10 0 10 20 30 40 -50 -40 -30 -20 -10 0 10 20 30 40 -50 -40 -30 -20 -10 0 10 20 30 40 -50 -40 -30 -20 -10 0 10 20 30 40 .......]
>
>
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> How can I do it? I hope someone can help me.
>
>
>
> cleo

It sounds like I might be doing your homework, but ...

a = [-50:40:10]

ncopies = 5
nelements = n_elements(a)
npts = ncopies*nelements

ans1 = rebin(a, npts, /sample)

; build up answer by concatenation
ans2 = []
for i = 1, ncopies do ans2 =[ans2, a]

; or else build up answer by copying
ans2 = intarr(npts)
for i = 0, npts-1, nelements do ans2[i] = a

TTFN,

David

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[Message index]

		repeating elements of an array By: Cleo Drakos on Sun, 24 August 2014 09:42
		Re: repeating elements of an array By: dg86 on Sun, 24 August 2014 13:09
		Re: repeating elements of an array By: Phillip Bitzer on Sun, 24 August 2014 13:13

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