How to find out RMS error in a simbiology model fit?

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Soumitra Athavale 2018-5-15

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https://ww2.mathworks.cn/matlabcentral/answers/400926-how-to-find-out-rms-error-in-a-simbiology-model-fit

编辑： Vijay 2018-5-16

Hello, I am using the simbiology graphical window (not writing any actual code!) to fit a kinetic model to my experimental data. I have the fits and I get a number of output figures including the stimated parameters etc. However, I am wondering how can I get a measure of the goodness of my fit? For example, from where can I extract an R-squared value for the fit?

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Answer 1

Vijay 2018-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/400926-how-to-find-out-rms-error-in-a-simbiology-model-fit#answer_320488

编辑：Vijay 2018-5-16

Hi Soumitra,

We currently do not calculate the R-squared value on the desktop, this change is scheduled for a future release. If you are looking to compare your fits we recommend using the Task Data Comparison tool which lists the AIC, BIC and RMSE among other metrics for fits.

To enable the Data Comparison Tool, click the Data Comparison button on the Fit Task. After a task has run, the Comparison table automatically populates with the metrics of the fit.

Additionally, you can manually calculate the R-squared value for your fit by exporting the fit results and data to the command line, using the Export context menu.

These links provide useful information about how to calculate the R-squared value for a fit.

https://www.mathworks.com/help/matlab/data_analysis/linear-regression.html#f1-15010

https://www.mathworks.com/help/matlab/data_analysis/interactive-fitting.html#bswij4t

Please let us know if you have further questions.