[Tutor] An -1.#IND error
Dinesh B Vadhia
dineshbvadhia at hotmail.com
Mon Jan 28 04:29:55 CET 2008
Luke:
This is literally the core of the code:
A = scipy.asmatrix(scipy.zeros((M, N), float))
q = scipy.asmatrix(scipy.zeros((N, 1)), float)
b = scipy.asmatrix(scipy.zeros((1, N)), float)
# populate A
# x is a vector of valid floats (I've checked)
# calculate b as:
b = A * x
After the matrix multiplication, the b vector elements are all "-1.#IND" 's. Note that there are no divisions by zero in the program.
Cheers
Dinesh
----- Original Message -----
From: Luke Paireepinart
To: Dinesh B Vadhia
Cc: tutor at python.org
Sent: Saturday, January 26, 2008 11:12 PM
Subject: Re: [Tutor] An -1.#IND error
Dinesh B Vadhia wrote:
> After a matrix*vector multiplication (ie. b = Ax, with A, x and b all
> floats), the b vector elements are all "-1.#IND". What does this
> mean? Btw, they are no divisions in the program eg. no divide by zeros.
A code sample would be _much_ more helpful here.
Please include one that exhibits the problem.
>
> Dinesh
>
>
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