new version of "newtr" function

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Andrea Vang 2018-10-2

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https://ww2.mathworks.cn/matlabcentral/answers/421871-new-version-of-newtr-function

评论： Walter Roberson 2022-6-8

Hi everybody I got a code (SRGTSToolbox) that has been written with old version of MATLAB. This is a part of that code:

% CALCULATE ACTUAL ERROR
w1 = p(:,used)';
a1 = radbas(dist(w1,p)*b);
[w2,b2] = solvelin2(a1,t);
a2 = w2*a1 + b2*ones(1,q);
sse = sumsqr(t-a2);
% Start
tr = newtr(mn,'perf');
tr.perf(1) = sumsqr(t);
tr.perf(2) = sse;

As can be seen there is a function called "newtr". What's the updated version of this function in MATLAB 2015? This is a part of radial basis neural network code. Thanks

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Walter Roberson 2020-2-14

http://cda.psych.uiuc.edu/matlab_pdf/nnet.pdf which is an old copy of the Neural Network Toolbox user guide, has this to say:

Utility Functions.

If you examine training functions such as trainc, traingd, and trainlm, note that they use a set of utility functions found in the nnet/nnutilsdirectory. These functions are not listed in Chapter 14, “Reference” because they may be altered in the future. However, you can use these functions if you are willing to take the risk that you might have to update your functions for future versions of the toolbox. Use help on each function to view the function’s input and output arguments.

These two functions are useful for creating a new training record and truncating it once the final number of epochs is known:

newtr - New training record with any number of optional fields.
cliptr - Clip training record to the final number of epochs.

The closest equivalent now appears to be nnetTrainingRecord, but that is not all that close. These days you would set the performFcn to 'sse' . I would have to dig further into toolbox/nnet/nnutils in the + directories to figure out how records of results are kept.