?? Undefined function or method 'svd' for input arguments of type 'double' and attributes 'full 3d real'.

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ibrahim 2013-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/68247-undefined-function-or-method-svd-for-input-arguments-of-type-double-and-attributes-full-3d-r

评论： Walter Roberson 2016-5-8

在 MATLAB Online 中打开

can someone assist me? i am trying to use the matlabs svd function but it returned an error

"?? Undefined function or method 'svd' for input arguments of type 'double' and attributes 'full 3d real'.".

here is part of the code i was working on:

F=imread(irisFileName); G=im2double(F);
%perform singular value decomposition 
xpattern=svd(G);
P=[xpattern' str2num(irisFiles(i).name(1:3))]; 
T=[T;P];
irisFileName
[size(P) size(T)]
end
end

thanks

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Answer 1

Wayne King 2013-3-22

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编辑：Wayne King 2013-3-22

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svd() only works on a 2-D matrix, although I'm surprised by your error message.

I would have expected:

"Error using svd Input must be 2-D."

You are using the MathWorks' svd() function, correct?

If you enter,

>>which svd

you get back some path like:

...matlab\matfun\@single\svd

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ibrahim 2013-3-22

在 MATLAB Online 中打开

i am very sorry, i don't really know the size of G because i actually got the code online and trying to use it for my project. let me copy the whole code here so that u can see it.

 clc;
clear;

%set base directory of irisBasis directory % irisDir = 'D:\MasterCS\CS553\IrisDatabase\IrisBasisAll40'; irisDir = 'C:\Users\livingstone\Desktop\iris'; clc; T=[]; irisFiles = dir(irisDir); for i=1:size(irisFiles,1) if not(strcmp(irisFiles(i).name,'.')|strcmp(irisFiles(i).name,'..')) irisFileName = [irisDir, '\', irisFiles(i).name];

F=imread(irisFileName); G=im2double(F);

%perform singular value decomposition xpattern=svd(G);

P=[xpattern' str2num(irisFiles(i).name(1:3))]; T=[T;P]; irisFileName [size(P) size(T)] end end

save irisBasisSVD T –ASCII

ibrahim 2013-3-22