Interpolate positions between 2 matrix

Question

Jose Martinez 2019-2-18

0
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https://ww2.mathworks.cn/matlabcentral/answers/445610-interpolate-positions-between-2-matrix

评论： Jose Martinez 2019-2-19

Hello,

If you see the picture below, I am representing dinamically the blue point with a matrix and imagesc function. What I would like to do is filling the gap bewteen points with more points, so the final graph woould look like a line.

An example how I am plotting the graph

% First point position in the matrix
0 0 1 0 0 0 
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
% Next time period the matrix will have other values for the second "blue" point
0 0 0 0 0 0 
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 1 0
% I would like to get automatically a matrix that interpolate between both "1" values and get something like below to draw a line, 
0 0 1 0 0 0 
0 0 0 1 0 0
0 0 0 1 0 0
0 0 0 0 1 0

I hope to make myself clear,

Thanks in advance!

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Answer 1

Akira Agata 2019-2-18

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https://ww2.mathworks.cn/matlabcentral/answers/445610-interpolate-positions-between-2-matrix#answer_361637

在 MATLAB Online 中打开

How about the following?

% First point position in the matrix
M1 = [0 0 0 1 0 0 0; 
0 0 0 0 0 0 0;
0 0 0 0 0 0 0;
0 0 0 0 0 0 0];
% Next time period the matrix will have other values for the second "blue" point
M2 = [0 0 0 0 0 0 0; 
0 0 0 0 0 0 0;
0 0 0 0 0 0 0;
0 0 0 0 0 1 0];
[row,col] = find(M1 | M2);
row2 = (1:4)';
col2 = round(interp1(row,col,row2));
M3 = zeros(size(M1));
M3(sub2ind(size(M3),row2,col2)) = 1;