numpy-discussion

[Numpy-discussion] numpy.linalg.linalg.LinAlgError: Singular matrix

[<kor...@id...>]

all of the variables n, st, st2, st3, st4, st5, st6, sx, sxt, sxt2, and
sxt3 are all floats.


A = array([[N, st, st2, st3],[st, st2, st3, st4], [st2, st3, st4, st5],
[st3, st4, st5, st6]])
B = array    ([sx, sxt, sxt2, sxt3])
lina = linalg.solve(A, B)

is there something wrong with this code?

it is returning

  File "C:\PYTHON23\Lib\site-packages\numpy\linalg\linalg.py", line 138,
in solve
    raise LinAlgError, 'Singular matrix'
numpy.linalg.linalg.LinAlgError: Singular matrix

Does anyone know what I am doing wrong?
-Kenny

Re: [Numpy-discussion] numpy.linalg.linalg.LinAlgError: Singular matrix

[Stephen W. <drs...@gm...>]

On 8/16/06, kor...@id... <kor...@id...> wrote:
>
> all of the variables n, st, st2, st3, st4, st5, st6, sx, sxt, sxt2, and
> sxt3 are all floats.
>
>
> A = array([[N, st, st2, st3],[st, st2, st3, st4], [st2, st3, st4, st5],
> [st3, st4, st5, st6]])
> B = array    ([sx, sxt, sxt2, sxt3])
> lina = linalg.solve(A, B)


Is your matrix A in fact singular?  Without numerical values of A, st, etc.,
it is hard to know.