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3 replies

W
Werner_E25-Diamond I
25-Diamond I
March 21, 2014

You sure can't multiply a 3x3 by a 4x4 matrix! To obtain a 3x4 matrix you have to multiply a 3 x n matrix with a n x 4 matrix.

W
Werner_E25-Diamond I
25-Diamond I
March 21, 2014

Why don't you simply use normal matrix arithmetic to get the "factorization" you need - if you need the result at all. You have different ways to do so:

21.03.png

L
lvl10720-TurquoiseAuthor
20-Turquoise
March 24, 2014

And a similar query :

No+solution+was+found+.PNG

Thanks in advance for your time and help.

Best Regards.

W
Werner_E25-Diamond I
25-Diamond I
March 24, 2014

Why do you want to solve for 21 variables when you only have 12 equations???????????????

The way to do it is exactly the same as I have shown above (2nd), just do it symbolically. the 3x3 matrix can be anything as long as the matrix isn't singular.

L
lvl10720-TurquoiseAuthor
20-Turquoise
March 25, 2014

I greatly appreciate your time and help to my questions, Werner. And I have a different question and I have observed the following :

(1).PNG

(2).PNG

I need help with the reason : the equation, the above ( red one ) , was not solved for 14th unknown ( X[13 ) .

Thanks again.

Best Regards.

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