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Topic: Creating Booleans from Vectors
Replies: 5   Last Post: Sep 17, 2013 11:23 PM

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Roger Stafford

Posts: 5,889
Registered: 12/7/04
Re: Creating Booleans from Vectors
Posted: Sep 17, 2013 7:25 PM
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"Michael " <mabowles@syr.edu> wrote in message <l1aehk$d3o$1@newscl01ah.mathworks.com>...
> x = [1 3 8 10 11];
> y = [2 6 9 15];
> xy_ordered = [1 2 3 6 8 9 10 11 15];
>
> cX = [1 0 1 0 1 0 1 1 0]
> cY = [0 1 0 1 0 1 0 0 1]; %by definition the is ~cX..

- - - - - - - - - -
cX = ismember(xy_ordered,x);
cY = ismember(xy_ordered,y);

The vectors cX and cY are logical vectors which contain true's and false's. To transform them to 1's and 0's, apply "double" to them. Note that if a number lies in both x and y, there will be a 1 (true) in both cX and cY in the same position. It is not necessary that x, y, or xy_ordered be ordered for this code to operate.

Roger Stafford



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