Re: Extracting matrix rows that meet a condition

[Knof]

> It works in my case, I get 1005 out of 1008 elements, i.e., apparently almost all rows have one element meeting the condition x > 0 & x < 1... I see no contradiction... Here it is how I see it (using of course the matrix you attached):
>
> [i,j] = find(x < 0 | x > 1);
>
> octave:41> size(x)
> ans =
>
>    1008      3
>
> octave:42> size(i)
> ans =
>
>    426     1
>
> octave:43> size(j)
> ans =
>
>    426     1
>
>
> octave:45> [k,l] = find(x > 0 & x < 1);
>
> octave:46> size(k)
> ans =
>
>    2592      1  % Repeated indices pointing to same row
>
> octave:48> size(unique(k))
> ans =
>
>    1005      1  % Unique number of indices < total row no. of x
>
> I fail to see the problem... Almost every single row in x have a value meeting
> x > 0 & x < 1...

The problem is I want to spit the matrix into two files. One file where all the rows that contain at least one value that meets the condition
(x < 0 | x > 1) are written to and the other file where all the rows where all three values match the condition (x > 0 & x < 1) are saved to it.
So the second file must contain all the rows that the first file does not.
I am sorry if I have not made that more clear before.

Knof

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