How to get regression plot for validation data using trainbr training function using MATLAB's nntool?

In nntool, when trainbr algorithm is used, MATLAB is not providing Regression plot for validation data but only for train and test data. However, it is displaying Regression plot for training, validation & test data while using trainlm training algorithm. For reference the figures are shown below:

FIGURE SHOWING TRAINBR REGRESSION PLOT & OTHER MODEL DETAILS

FIGURE SHOWING TRAINLM REGRESSION PLOT & OTHER MODEL DETAILS

Please help me in debugging this issue. Thanks in advance!

[Muhammad Usman Saleem]

Please someone answer this question please

Answer 1

[Aneela]

Hi Sachin Bharadwaj,

I found below statement from the MathWorks Documentation.

The function “trainbr” that performs Bayesian Regularization disables validation stops by default. 

For more information on “trainbr”, refer to the following link: https://www.mathworks.com/help/deeplearning/ref/trainbr.html#:~:text=Validation%20stops%20are,strictly%20positive%20value.

I also found an answer to a similar question in community, which states:

• “max_fail” denotes the maximum number of times that we allow the validation to improve or to not improve before terminating training.
• By default, max_fail is set to 0.
• This can be the reason for MATLAB not providing regression plot for validation data.

Refer to the following answer by @MathWorks Support Team for a detailed explanation about how “trainbr” works:

https://www.mathworks.com/support/search.html/answers/405727-why-does-the-trainbr-function-not-require-a-validation-dataset.html