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Size function - Dimensions of matrix:
For the matrix mat shown next, it has three rows and two columns, therefore the size is 3 × 2. The length is the larger dimension that is 3.
>> mat = [1:3; 5:7]'
mat =
1 5
2 6
3 7
>> size(mat)
ans =
3 2
>> length(mat)
3
>> [r c] = size(mat)
r = 3
c = 2
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