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readme.md

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@@ -689,7 +689,7 @@ def predict(Theta1,Theta2,X):
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- 可以看出,若是`x`![{l^{(1)}}](http://chart.apis.google.com/chart?cht=tx&chs=1x0&chf=bg,s,FFFFFF00&chco=000000&chl=%7Bl%5E%7B%281%29%7D%7D)距离较近,==》![{f_1} \approx {e^0} = 1](http://chart.apis.google.com/chart?cht=tx&chs=1x0&chf=bg,s,FFFFFF00&chco=000000&chl=%7Bf_1%7D%20%5Capprox%20%7Be%5E0%7D%20%3D%201),(即相似度较大)
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若是`x`![{l^{(1)}}](http://chart.apis.google.com/chart?cht=tx&chs=1x0&chf=bg,s,FFFFFF00&chco=000000&chl=%7Bl%5E%7B%281%29%7D%7D)距离较远,==》![{f_2} \approx {e^{ - \infty }} = 0](http://chart.apis.google.com/chart?cht=tx&chs=1x0&chf=bg,s,FFFFFF00&chco=000000&chl=%7Bf_2%7D%20%5Capprox%20%7Be%5E%7B%20-%20%5Cinfty%20%7D%7D%20%3D%200),(即相似度较低)
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- 高斯核函数的`σ`越小,`f`下降的越快
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- 高斯核函数的`σ`越小,`f`下降的越快
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![enter description here][30]
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![enter description here][31]
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