ERROR IN NETSUM , DON'T KNOW WHAT TO DO ABOUT IT

Question

Gary 2014-8-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146918-error-in-netsum-don-t-know-what-to-do-about-it

评论： Geoff Hayes 2014-8-15

在 MATLAB Online 中打开

every time i input

info = netsum('code')%or name type

the result will be as follow

Error in net_input_fcn (line 6)
info = nnModuleInfo(fcn);
Error using nnet7.net_input_fcn
Output atgument "out1"(and maybe others) not assigned during call to "D:\Program Files\MATLAB\R2014a\toolbox\nnet\nnobsolete\+nnet7\net_input_fcn.m>net_input_fcn" 
Error in netsum (line 28)
  n = nnet7.net_input_fcn(mfilename,varargin{:});

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Answer 1

Geoff Hayes 2014-8-9

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https://ww2.mathworks.cn/matlabcentral/answers/146918-error-in-netsum-don-t-know-what-to-do-about-it#answer_147988

Gary - I think that you have to define a code. According to netsum,

info = netsum('code') returns information about this function. The following codes are supported:

netsum('name') returns the name of this function.

netsum('type') returns the type of this function.

Etc.

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Gary 2014-8-15

在 MATLAB Online 中打开

here're the results z1 = [1 2 4; 3 4 1] z2 = [-1 2 2; -5 -6 1] b = [0; -1] n = netsum({z1,z2,concur(b,3)})

z1 =

     1     2     4
     3     4     1

z2 =

    -1     2     2
    -5    -6     1

b =

     0
    -1

n =

     0     4     6
    -3    -3     1

>> netsum('name') Error in net_input_fcn (line 6) info = nnModuleInfo(fcn);

Error using nnet7.net_input_fcn Output argument "out1" (and maybe others) not assigned during call to "C:\Program Files\MATLAB\R2014a\toolbox\nnet\nnobsolete\+nnet7\net_input_fcn.m>net_input_fcn".

Error in netsum (line 28) n = nnet7.net_input_fcn(mfilename,varargin{:});

Geoff Hayes 2014-8-15

It is interesting that the error message seems to be raised from some code that is considered obsolete (see nnobsolete). The documentation isn't very clear on the usage of this function with respect to the input codes. Perhaps it is only meant to be called after the creation of a certain network? From the documentation at netsum

Use feedforwardnet or cascadeforwardnet to create a standard network that uses netsum.

What happens if you create the (say) feedforwardnet and then run netsum('name')?

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