Error using == Matrix dimensions must agree.

i have message error in matlab : Error using == Matrix dimensions must agree.

Error in Pengujian (line 39) [m,n] = find(output==target); please help me what can i do?

[Birdman]

What are your output and target variables look like?

[Novy Bua Rante]

i will classification the image of green bean coffee using matlab with neural network backpropagation

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 input = [metric;eccentricity];
target = zeros(1,96);
target(:,1:30) = 1;
target(:,31:51) = 2;
target(:,52:72) = 3;
target(:,73:96) = 4;

 load net
output = round(sim(net,input));

 [m,n] = find(output==target);
akurasi = sum(m)/total_images*100;

[Walter Roberson]

Your net is not returning one result for each input, or else it is returning a column vector which you are trying to compare to a row vector. I suspect that is the problem, that you will need to transpose one of the two to compare them.

Answer 1

[Walter Roberson]

Assuming that you are trying to find the indices of each value of output within the matrix target, then:

[tf, idx] = ismember(output, target);
m = zeros(size(output));
n = zeros(size(output));
[m(tf), n(tf)] = ind2sub( size(target), idx(tf) );

Any value that does not appear within target will have m and n pairs of 0.