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Matlab-prtools conflict in boxplot function
 
idimou
Posted: 12 July 2009 01:03 PM   [ Ignore ]  
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Hi,
is this a known bug or did I do something wrong? Any workarounds?

>> x=rand(10,5)

x =

    0.9058    0.9706    0.0357    0.0318    0.3816
    0.1270    0.9572    0.8491    0.2769    0.7655
    0.9134    0.4854    0.9340    0.0462    0.7952
    0.6324    0.8003    0.6787    0.0971    0.1869
    0.0975    0.1419    0.7577    0.8235    0.4898
    0.2785    0.4218    0.7431    0.6948    0.4456
    0.5469    0.9157    0.3922    0.3171    0.6463
    0.9575    0.7922    0.6555    0.9502    0.7094
    0.9649    0.9595    0.1712    0.0344    0.7547
    0.1576    0.6557    0.7060    0.4387    0.2760

>> boxplot(x)
??? Adding new fields to an object is not permitted.

Error in ==> C:\Program Files\MATLAB\R2009a\toolbox\prtools\@dataset\subsasgn.p>subsasgn at 22


Error in ==> boxplot>computeBoxLocation at 2039
        boxValDs.(fn{i}) = boxValVect;

Error in ==> boxplot at 311
[boxVal,boxValPlot,boxIdx] = computeBoxLocation(xSorted,...

[ Edited: 26 July 2009 11:25 PM by idimou]
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pavel
Posted: 12 July 2009 01:15 PM   [ Ignore ]   [ # 1 ]  
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Hi idimou,

it looks to me that PRTools dataset object masks a different dataset object (statistical toolbox?)
Try to remove PRTools from the Matlab path - your boxplot could be working.

Does it help?

Pavel

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idimou
Posted: 12 July 2009 04:16 PM   [ Ignore ]   [ # 2 ]  
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I think I found a workaround (removing the path as you said, and readding it programatically)

rmpath('C:\Program Files\MATLAB\R2009a\toolbox\prtools');
clear classes;
boxplot(Errors);
addpath('C:\Program Files\MATLAB\R2009a\toolbox\prtools');

its not good practice, but it works.

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idimou
Posted: 26 July 2009 11:25 PM   [ Ignore ]   [ # 3 ]  
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Of course my ad-hoc workaround clears the variables too, so you’d have to save them, then clear classes, then load the workspace again, and then call boxplot.

Perhaps a more neat solution might be appropriate by the development team, in the next release.

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