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脊柱和甲壳之间的区别
原标题:the difference between ridge and A in matlab

鉴于<代码>A、b和L2规范化参数beta = 0,为什么<代码>ridge和>>><给出两种不同的解决办法?

b = [ 0
    -2
    -3
    -3
    -3
    -3
    -3
    -3
    -3
    -3
    -3
    -3
    -3 ];

A = [
1   0   0   0
0.750000000000000   0.250000000000000   0   0
0.500000000000000   0.500000000000000   0   0
0.250000000000000   0.750000000000000   0   0
0   1   0   0
0   0.750000000000000   0.250000000000000   0
0   0.500000000000000   0.500000000000000   0
0   0.250000000000000   0.750000000000000   0
0   0   1   0
0   0   0.750000000000000   0.250000000000000
0   0   0.500000000000000   0.500000000000000
0   0   0.250000000000000   0.750000000000000
0   0   0   1
];

>> ridge(b, A, 0,0)
ans = 
    0.6942
   -0.1856
         0
   -0.0468

>> A  b
ans = 
   -0.8604
   -3.4188
   -2.8970
   -3.0343
问题回答




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