What is the equivalent of mmult of excel in matlab?
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Michael Rahul Soosai
on 10 Sep 2021
Commented: Michael Rahul Soosai
on 10 Sep 2021
I need to multiply two uneven matrix (1 row, 4 column and 10 row, 4 column) to yield a single value. In excel i used mmult for the same
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Accepted Answer
Steven Lord
on 10 Sep 2021
The * operator performs matrix multiplication, but in order for that operation to be mathematically defined you need to transpose the second matrix (so the number of columns in the first matches the number of rows in the second) and you will receive a 1-by-10 matrix not a single value.
x = [1 2 3 4]
y = reshape(1:40, 10, 4)
z = x*y.' % transpose y
To check:
z6 = 1*6 + 2*16 + 3*26 + 4*36
z(6)
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