Trouble pulling out numbers from a matrix into variables

So I need to scan a matrix for any "1" in the 6th column and then if that row has a 1 in the 6th column, I need to turn the 2nd column of the same row into an x variable, and the 4th column of the same row into a y variable, so I can plot it later.

From my understanding I need to use the intersect function? I am new to matlab and don't exactly know how to use it, or am I using the wrong function? If someone could show me how to do this I would really appreciate it. Thanks in advance

Answer 1

[Star Strider]

I suppose you could use intersect, but a simpler approach will work, especially if your matrix isn’t huge:

M = randi(10, 15, 6)            % Create data

x = M(M(:,6)==1,2)              % Use logical indexing to get ‘x’ from column 2
y = M(M(:,6)==1,4)              % and ‘y’ from column 4

[Steve]

thanks! and good explanation too

[Star Strider]

My pleasure!