MATLAB: How to find out position of minimum element in a matrix

matrixmatrix array

a=[8 2 5;2 -2 4;9 5 4] here position of minimum value is 2*2

Best Answer

a=[8 2 5;2 -2 4;9 5 4] ;
[r,c]=find(a==min(a(:)));

This will even work if there are multiple positions where the minimum value exists: in that case r and c will be vectors.

Related Solutions

MATLAB: Find the position of a minimum in an array

a=[ 3 4 2 6 0 9 ; 3 5 8 2 5 9]; 
[min_val,idx]=min(a(:));
[row,col]=ind2sub(size(a),idx)

MATLAB: Finding the position of the minimum element in the matrix

You really should use find() rather than min() since find() will find them all and min() only finds the first occurrence, which is important since the min could occur at multiple locations:

M = [1 5 7; 2 4 5; 4, 1, 5]
minValue = min(M(:));
% Find all (row, column) pairs where M = the min value.
[rows, columns] = find(M == minValue)
% Print them out:
for k = 1 : length(rows)
	fprintf('M equals the min value of %f at row = %d, column = %d.\n', ...
		minValue, rows(k), columns(k));
end

You'll see

M =

1 5 7

2 4 5

4 1 5

rows =

columns =

M equals the min value of 1.000000 at row = 1, column = 1.

M equals the min value of 1.000000 at row = 3, column = 2.

Best Answer

Related Solutions

MATLAB: Find the position of a minimum in an array

MATLAB: Finding the position of the minimum element in the matrix

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