Error using * Incorrect dimensions

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Leia Troop
Leia Troop on 18 Oct 2021
Answered: Bjorn Gustavsson on 19 Oct 2021
I am trying to do least squares fitting for a homework assignment
I have included my code and related workspace as an attachment. I am having issues with line 8. I have fiddled with the code but haven't found a solution.
(also I know I don't need the n variable its just there for now)
an explanation of what is wrong and how to solve would be very much appreciated. Thank you!

Answers (1)

Bjorn Gustavsson
Bjorn Gustavsson on 19 Oct 2021
For problems like these you should learn to run the code line-by-line at the command-line prompt. Then check the size and type of the resulting variables, using size(X) and whos X for example. Also check which combinations of transposes makes your multiplications work and what shapes of the matrices are.
HTH

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