最近,我已经熟练地使用Python/scipy curve_fit来执行线性回归。然而,对于高阶多项式,我的数据有时是过拟合的。
如何增加正则化以减少过度拟合?
发布于 2013-12-27 15:55:35
我想知道套索惩罚是否适合你:
# the high order items can be integrated into X (such as x1^2,x1*x2), and change it into a linear regression problem again
lasso.fit(X, y)
# the selection range of lambda can be determined by yourself.
LassoCV(lambda=array([ 2, 1,9, ..., 0.2 , 0.1]),
copy_X=True, cv=None, eps=0.001, fit_intercept=True, max_iter=1000,
n_alphas=100, normalize=False, precompute=’auto’, tol=0.0001,
verbose=False)在交叉验证过程中应该选择最优的lambda。
https://stackoverflow.com/questions/20803090
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