Adding coordinate values (x,y) to a matrix depending on another matrix

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lauuser1
lauuser1 2016-4-27
回答： Walter Roberson 2016-4-27
There is one matrix that is a 10 x 10 that is initially all zeros.
matrix = zeros(10,10)
This matrix will eventually replace values of 0 with 1 until the whole matrix is made up of 1's.
There is another matrix that is an unknown number (L) x 2
track = zeros(L,2)
Now what I would like to do is populate track with coordinates whenever matrix changes from 0 to 1. So if a 1 is found in matrix in the 2nd row 1st column then the next value of 1 is in the 5th row 10th column, track will look like
track = [2 1; 5 10]
What is a possible way to do this?

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回答（1 个）

Walter Roberson
Walter Roberson 2016-4-27
[tr, tc] = find(matrix);
track = [tr, tc];

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