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Raising Matrix to Negative Power

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I am having problems raising a matrix to a negative power. I am relatively new to Ruby, so please forgive me if I have missed something obvious.

The software I am using is basically a GIS-type that allows ruby coded interrogation/assignment of its input. It has a class called OtMatrix that seems to be preventing me from applying a negative power to it, by saying that it cannot be coerced to a fixnum.

Here is the basic code...

elas = 0.24 # I have stored it as a positive and used as denominator
matrix2 = 1/matrix**(elas)


All ideas gratefully recieved!
Nov 19 '07 #1
3 8591
brendanriley
1 New Member
You cannot multiply a matrix to a negative power.
Sep 24 '08 #2
Airslash
221 New Member
You cannot multiply a matrix to a negative power.
what about the Unity Matrix then? Isn't that the original matrix to power -1 ?
Oct 13 '08 #3
hamartrom
1 New Member
Actually, the unity matrix should not be seen as the matrix to power (-1), as the (-1) is only a representation for the inverse matrix, similarly to the the inverse of other things, such as f^(-1). It is therefore not raised to any power, it is just a way of notation.
Sep 29 '09 #4

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