Re: How to make the matrix include variable "x"

Kazuhiko UEBAYASHI wrote:
> I'm trying to use SciPy module.
> 
> Is it possble to make the following Matrix using SciPy ?
> 
>   A(x) = (x**0 x**1 x**2 ).
> 
> 
> I tried in Python with SciPy
>   	>> from scipy import *
> 	>> x0 = 10; x1 = 8; x2 = 3
> 	>> print mat('[x0; x1; x2]')
> 	Matrix([[0],
> 	       [1],
> 	       [2]])
> . I expected the answer 
>   Matrix([[10],
>          [8],
>          [3]])
> but it didn't work well.

When mat() is interpreting a string, it doesn't evaluate variables. In
this case, it's ignoring the 'x' characters.

You want

mat([[x0], [x1], [x2]])

--

-- 
Robert Kern
rkern <at> ucsd.edu

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter