On Fri, Aug 26, 2011 at 2:57 PM, Charles R Harris
wrote:
>
>
> On Fri, Aug 26, 2011 at 12:38 PM, Mark Janikas wrote:
>>
>> Charles! That looks like it could be a winner! It looks like you always
>> choose the last column of the U matrix and ID the columns that have the same
>> values? It works
On Fri, Aug 26, 2011 at 12:38 PM, Mark Janikas wrote:
> Charles! That looks like it could be a winner! It looks like you always
> choose the last column of the U matrix and ID the columns that have the same
> values? It works when I add extra columns as well! BTW, sorry for my lack
> of knowl
cussion-boun...@scipy.org<mailto:numpy-discussion-boun...@scipy.org>]
On Behalf Of Mark Janikas
Sent: Friday, August 26, 2011 10:35 AM
To: Discussion of Numerical Python
Subject: Re: [Numpy-discussion] Identifying Colinear Columns of a Matrix
I actually use the VIF when the design matrix can be
t 26, 2011 10:35 AM
> To: Discussion of Numerical Python
> Subject: Re: [Numpy-discussion] Identifying Colinear Columns of a Matrix
>
> I actually use the VIF when the design matrix can be inverted I do it the
> quick and dirty way as opposed to the step regression:
>
> 1. Calc
t 26, 2011 10:35 AM
> To: Discussion of Numerical Python
> Subject: Re: [Numpy-discussion] Identifying Colinear Columns of a Matrix
>
> I actually use the VIF when the design matrix can be inverted I do it
> the quick and dirty way as opposed to the step regression:
>
> 1. Calc
On Fri, Aug 26, 2011 at 7:41 PM, Mark Janikas wrote:
> I wonder if my last statement is essentially the only answer... which I
> wanted to avoid...
>
> Should I just use combinations of the columns and try and construct the
> corrcoef() (then ID whether NaNs are present), or use the condition nu
Sent: Friday, August 26, 2011 10:28 AM
To: Discussion of Numerical Python
Subject: Re: [Numpy-discussion] Identifying Colinear Columns of a Matrix
On Fri, Aug 26, 2011 at 1:10 PM, Mark Janikas wrote:
> Hello All,
>
>
>
> I am trying to identify columns of a matrix that are perfectl
riday, August 26, 2011 10:28 AM
To: Discussion of Numerical Python
Subject: Re: [Numpy-discussion] Identifying Colinear Columns of a Matrix
On Fri, Aug 26, 2011 at 1:10 PM, Mark Janikas wrote:
> Hello All,
>
>
>
> I am trying to identify columns of a matrix that are perfectly colline
On Fri, Aug 26, 2011 at 1:10 PM, Mark Janikas wrote:
> Hello All,
>
>
>
> I am trying to identify columns of a matrix that are perfectly collinear.
> It is not that difficult to identify when two columns are identical are have
> zero variance, but I do not know how to ID when the culprit is of a h
ython'
Subject: [Numpy-discussion] Identifying Colinear Columns of a Matrix
Hello All,
I am trying to identify columns of a matrix that are perfectly collinear. It
is not that difficult to identify when two columns are identical are have zero
variance, but I do not know how to ID when the culpr
Hello All,
I am trying to identify columns of a matrix that are perfectly collinear. It
is not that difficult to identify when two columns are identical are have zero
variance, but I do not know how to ID when the culprit is of a higher order.
i.e. columns 1 + 2 + 3 = column 4. NUM.corrcoef(m
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