【机器学习】Linear least squares, Lasso,ridge regression有何本质区别?

Linear least squares, Lasso,ridge regression有何本质区别?

Linear least squares, Lasso,ridge regression有何本质区别?
还有 ridge regression  uses L2 regularization; and  Lasso  uses L1 regularization.
L1和L2一般如何选取?

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