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Re: Unpacking algorithm [message #39317]

Mon, 17 May 2004 06:41

Timm Weitkamp
Messages: 66
Registered: August 2002

Member

Tmorri:

If I have understood your problem, then the following might do the job
(given your vector v0, of which you want to get every 4th element into
v1 and the others into v2).

i0 = INDGEN(N_ELEMENTS(v0))
i1 = WHERE((i0 MOD 4) EQ 0, COMPLEMENT=i2)
v1 = v0[i1]
v2 = v0[i2]

Hope this helps,
Timm

PS. I'm sure there's a better way than using WHERE, but I don't like to
think.

On 15.05.04 at 19:00 -0400, Tmorri wrote:

> one second thought,
>
> Does any one have an algorithm to unpack this vector
>
>
> v0=[0 x1 x2 x3 0 x4 x5 x1 0 x2 x3 x4 0 x5 x1 x2 0 x3 x4 x5]
>
> in the following way:
>
> v1=[0 0 0 0 0]
>
> v2=[x1 x2 x3 x4 x5 x1 x2 x3 x4 x5 x1 x2 x3 x4 x5]
>
> x1,x2,x3,x4,x5 are variables that can take any value, even zero, (0).
>
> I just want to get rid othe zeroes (every fourth element)shown in vector
> v0
>
>
> Thanks,
>
> Tmorri
>
>

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[Message index]

		Re: Unpacking algorithm By: Timm Weitkamp on Mon, 17 May 2004 06:41
		Re: Unpacking algorithm By: MKatz843 on Sun, 16 May 2004 21:37
		Re: Unpacking algorithm By: Christopher Lee on Sun, 16 May 2004 08:19
		Re: Unpacking algorithm By: Tmorri on Sat, 15 May 2004 16:00

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