inv matrix command error

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I am using a code my TA gave us to use for our lab report (had to edit some of his code to make it work so far) and he wants us to use the inv command and I have no experience with this. Any ideas on what to adjust to make it work?
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madhan ravi
madhan ravi 2018-10-18
Maybe P1 and P2 are vectors resulting in rectangular matrix.
Anthony Voccia
Anthony Voccia 2018-10-18
P1 and P2 vectors are taken directly out of an excel document that have already had everything created. The TA we have doesn't always give us the best methods to use. I will use the code command next time

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James Tursa
James Tursa 2018-10-18
编辑:James Tursa 2018-10-18
Normally the inv is applied to the left hand side coefficients, since people usually write the "A" matrix on the left and the "b" vector on the right in an Ax=b linear system. So I am guessing you need to change the inv( ) calculation to this:
V = inv(LHS)*RHS;
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Anthony Voccia
Anthony Voccia 2018-10-18
Reversing it did make it work, maybe the TA gave it to use backwards?

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