擅长:python、mysql、java
<p>我让它这样工作:</p>
<pre><code>y = np.zeros(X.shape)
idxN, idxP = X<0, X>=0
yn,yp,xn,xp = y[idxN], y[idxP],X[idxN],X[idxP]
yn = [math.log(1+np.exp(x)) for x in xn]
yp = xp+[math.log(np.exp(-x)+1) for x in xp];
</code></pre>
<p>如果有更好的办法,请告诉我。谢谢。你知道吗</p>