[Tutor] HELP- Regarding working with python

[eryksun]

On Fri, Jan 18, 2013 at 3:25 AM, Lie Ryan <lie.1296 at gmail.com> wrote:
> On 18/01/13 17:11, Gayathri S wrote:
>>
>>  >>> import numpy as np
>>  >>> import matplotlib.pyplot as plt
>>  >>> import mlpy
>>  >>> np.random.seed(0)
>>  >>> mean,cov,n=[0,0],[[1,1],[1,1.5]],100
>>  >>> x=np.random.multivariate_normal(mean,cov,n)
>>  >>> pca.learn(x)
>> Traceback (most recent call last):
>>    File "<interactive input>", line 1, in <module>
>> NameError: name 'pca' is not defined
>
> As in your particular problem, the basic issue is that you have not defined
> 'pca' to refer to any object. You need to create an object named pca, which
> in this particular case the object is probably an instance of mlpy.PCA,
> which can be constructed like this:
>
>     pca = mlpy.PCA()

Yes, it's a mistake in the PCA example from the docs:

http://mlpy.sourceforge.net/docs/3.5/dim_red.html#principal-component-analysis-pca