??? Undefined function or method 'princomp' for input arguments of type 'double'.

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Tim Bennett
Tim Bennett 2013-6-13
评论： ali karami 2022-4-26
Hello,
I would like to implement a PCA on a matrix but when I use the princomp function ([COEFF,SCORE] = princomp(X)), Matlab shows me this:
??? Undefined function or method 'princomp' for input arguments of type 'double'.
Even typing in "princomp" results in:
File 'princomp' not found.
Statistics toolbox is installed and licensed (i.e Symbolic Math Toolbox Version 5.2 R2009a) and I've tried using "which princomp" and "rehash toolboxcache" prior to this command but with no success.
Do I need anything specifically in the Current Directory for the princomp function to be activated?
Any guidance would be appreciated.

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回答（1 个）

the cyclist
the cyclist 2013-6-13
The toolbox you just cited is the Symbolic Math Toolbox. That is not the same as the Statistics Toolbox.
Are you sure you have the stats toolbox?
  1 个评论
ali karami
ali karami 2022-4-26
I had the same problem.
go the Preall.m function
change line this function with pca
like this :
[COEFF,Prealligned_source] = pca(source);
[COEFF,Prealligned_target] = pca(target);

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