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Perform Ridge Regression with this free online tool.
Ridge regression is similar to linear least squares regression, but it includes an l2 regularization term to prevent the coefficients getting too large and overfitting the data.
How to Perform Ridge Regression
Upload your data using the input at the top of the page
Pick the x and y values for your regression fit.
Pick a value for alpha. Bigger alpha values increase the amount of regularization that occurs.