[SciPy-user] Zeros

[Hoyt Koepke]

Don't know if this helps, but it might:

In matlab, all the typical operations assume the variables are
matrices and tries to do matrix multiplication on them.  Array-type
operations are done using .*,  .^, etc.  In numpy and scipy, however,
there are two types, arrays and matrices, which you can easily convert
back and forth from using  mat(X) and M.A or array(M).  Array
operations are, roughly speaking, element wise, and matrix operations
do what you'd expect.  It takes a little getting used to, but I find
that distinguishing the types has a lot of advantages.

So to get the behavior you're expecting, you probably need to declare
a column matrix, so try mat(zeros(N)).T  (the .T to transpose it from
a row to a column).

--Hoyt

On Sat, Mar 15, 2008 at 10:30 AM, Natali Melgarejo Diaz
<nmelgarejodiaz at gmail.com> wrote:
> Good afternoon to everyone!!
>
> I want to make a column vector using numpy, like in Matlab when you do
> zeros(N,1). I've been doing it with zeros(N) and i already get an array. It
> maybe be the same but the results  get are different with the formulas
> involved.
>  Thanks ;))
>
> ********Natali********
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