Solved: solving equations for unknows

SFares · ‎Jan 12, 2015

Hello,

in the attached sheet , please scroll down untill you get to two red arrows.I have writen my question there. i am not sure how to solve for the unknowns with two matrices. Thank you!

Werner_E · ‎Jan 12, 2015

You may use a simple numeric solve block to do the job.

BTW, the way you tried to set up your matrices by matrix multiplication was awfully wrong! [3x3]*[3*1]=[3*1] and not a square matrix. You have to multiply by a diagonal matrix (see attached sheet).

Or you may define the matrix beforehand but then you must make it a function in all unknown variables:

View solution in original post

Werner_E · ‎Jan 12, 2015

You may use a simple numeric solve block to do the job.

BTW, the way you tried to set up your matrices by matrix multiplication was awfully wrong! [3x3]*[3*1]=[3*1] and not a square matrix. You have to multiply by a diagonal matrix (see attached sheet).

Or you may define the matrix beforehand but then you must make it a function in all unknown variables:

SFares · ‎Jan 12, 2015

Thank you Werner for the detailed explanation and help!