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What is the difference between * and .* in Matlab?
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* is matrix multiplication while . * is elementwise multiplication. In order to use the first operator, the operands should obey matrix multiplication rules in terms of size.
* is matrix multiplication, . * is array multiplication (i.e. element-wise).
Description. example. C = A . * B multiplies arrays A and B by multiplying corresponding elements. The sizes of A and B must be the same or be compatible.
* is a vector or matrix multiplication
.* is a element wise multiplication
a = [ 1; 2]; % column vector
b = [ 3 4]; % row vector
a*b
ans =
3 4
6 8
while
a.*b.' % .' means tranpose
ans =
3
8
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