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FailingBetter
Level 2
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HP Prime Linear Solver question

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How do you "solve" a matrix in the way the Linear Solver app does, if the matrix is greater than 3x4?

 

The Prime User Guide says you do this by storing the two matrices in M1 and M2, then calculate M2^-1 • M1.  However, this often doesn't work—I believe—because M2 isn't invertible (Home says "Error: X/0" and CAS says "Error: Invalid Dimension").

 

I'm just begging Linear Algebra class, so enlighten me if I've got a concept or term wrong.

 

Thanks!

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cyrille
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Hello,

look at the RREF command.

It stands for Row Reduced Echelon form...

Basically, it will perform line[n]=line[n]+factor*line[j] operations until it can get an identity matrix on the left part of the matrix (which is how you solve a matrix by hand, or invert a matrix by hand)...

It works on any matrix, it does not have to be square.

 

more info is available (with example) in the build in help

 

Cyrille

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