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Re: Help [message #15534 is a reply to message #5724]

Fri, 21 May 1999 00:00

Pavel Romashkin
Messages: 166
Registered: April 1999

Senior Member

The task is not strictly defined: the two matrices Tri provided are
different in size. Therefore, I treated it as a general problem. Here is
a 1-line solution for any size matrix:

print, (bindgen(k*m+m-1, x) mod m) eq 0

Here,
m is the length of the cycle within a row,
k is an integer multiplier to obtain the necessary row length,
x - arbitrary number of rows.

Example with m=4, k=3, x=5:
IDL> print, (bindgen(3*4+3, 5) mod 4) eq 0
1 0 0 0 1 0 0 0 1 0 0 0 1 0 0
0 1 0 0 0 1 0 0 0 1 0 0 0 1 0
0 0 1 0 0 0 1 0 0 0 1 0 0 0 1
0 0 0 1 0 0 0 1 0 0 0 1 0 0 0
1 0 0 0 1 0 0 0 1 0 0 0 1 0 0

Resulting matrix can be trimmed in any fashion you desire. Or, maybe I
could just type matrices in, if they were needed precisely and only in the
way Tri sent them?...
Cheers,
Pavel

Tri VU KHAC wrote:

> Hi folks,
>
> I'm looking for an efficient way to produce the matrix of type (I woulk
> like to be able to avoid the FOR statement)
>
> 0 1 0 1 0 1 0 1
> 1 0 1 0 1 0 1 0
> 0 1 0 1 0 1 0 1
> 1 0 1 0 1 0 1 0
>
> OR
>
> 1 0 0 1 0 0 1
> 0 1 0 0 1 0 0
> 0 0 1 0 0 1 0
> 1 0 0 1 0 0 1
>
> ETC.
>
> Best regards,
> Tri.

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[Message index]

		Help By: psumartoira on Fri, 02 February 1996 00:00
		Re: Help By: Vapuser on Wed, 26 May 1999 00:00
		Re: Help By: R.Bauer on Tue, 25 May 1999 00:00
		Re: Help By: Pavel Romashkin on Fri, 21 May 1999 00:00
		Re: Help By: Martin Schultz on Fri, 21 May 1999 00:00
		Reading ASCII files as structure: Help By: limiqt on Wed, 30 September 2015 19:15
		Re: Reading ASCII files as structure: Help By: penteado on Thu, 01 October 2015 19:25

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