perClass | Error using parzenc with Matlab 2009a

Error using parzenc with Matlab 2009a

Rob Ottenhoff

Posted: 02 June 2009 12:22 PM

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Total Posts: 8

Joined 2009-06-02

Hi,

When using parzenc in Matlab 2009a ( 7.8.0.347 ). I get the following error:

??? Undefined function or method ‘bsxfun’ for input arguments of type ‘dataset’.

Error in ==> var at 85
x = bsxfun(@minus, x, xbar);

Error in ==> std at 32
y = sqrt(var(varargin{:}));

Error in ==> parzenc at 94
h = max(std(a)); % for sure a too high value

In Matlab 2007 my code works fine. Does anybody know how to resolve this ?

Thank in advance and with regards,

Rob

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BobDuin

Posted: 02 June 2009 07:55 PM

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Joined 2008-11-08

Hi Rob,

std() has been overloaded for the prtools dataset type. I don’t see it happening in your error messages. So I am afraid that either prtools is not found or another dataset is active. Try ‘which dataset’. Change your path and put prtools on top if necessary.

Best regards,

Bob Duin

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pavel

Posted: 02 June 2009 08:27 PM

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Total Posts: 236

Joined 2008-04-26

Hi Rob,

I tested parzenc under 2009a (the same build as you have) and I don’t see any problem:

>> a=gendatb
Banana Set, 100 by 2 dataset with 2 classes: [50  50]
>> w=parzenc(a)
Parzen Classifier, 2 to 2 trained  mapping   --> parzen_map

>> [v1,v2,v3]=prversion

v1 =

    4.1040

v2 =

4.1.4

v3 =

28-Apr-2009_17:42

>> which dataset
/Users/pavel/Desktop/prtools_com/prtools/@dataset/dataset.p  % dataset constructor

It could be the statistical toolbox on your path?

Best Regards,

Pavel

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Rob Ottenhoff

Posted: 03 June 2009 07:55 AM

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Total Posts: 8

Joined 2009-06-02

Hi Bob, Pavel,

Thank you for your answers. The dataset type is ok. If I run Pavel’s code I get the mentioned error. The reported prtools version is 4.0010, 4.0.14, 05-Mar-2005 so I probably need an upgrade.

Greetings,

Rob

Update: I downloaded and installed 4.1.4 version and the problem has disappeared. Thanks.

[ Edited: 03 June 2009 08:25 AM by Rob Ottenhoff]

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