# Calculate R squared from a linear regress

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JFz am 22 Jan. 2018
Kommentiert: Star Strider am 22 Jan. 2018
Hi, I have a set of scattered data and I can use the operator "\" to do a linear fit on the data. But is there a simple matlab function to get the R^2? I am trying to skip the calculation shown on page: https://www.mathworks.com/help/matlab/data_analysis/linear-regression.html
BTW, I don't have machine learning toolbox.
Thanks for any help. If there is no simple matlab function, then I will have to try to calculate by using the sample code shown on the above page.
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Star Strider am 22 Jan. 2018
It depends on the regression you’re doing. If you have a simple bivariable (as opposed to multivariable) linear regression, you can simply square one of the off-diagonal elements of the (2x2) matrix returned by corrcoef. It will give the same result.
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Star Strider am 22 Jan. 2018
As always, my pleasure!

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