for i in vals:

This is a Python code snippet that loops through each element in the list "vals" and assigns it to the variable "i". The code that needs to be executed for each loop iteration should be indented below this line. For example:

vals = [1, 2, 3, 4, 5]
for i in vals:
    print(i)

This code will print each element of the list "vals" on a new line.

相关问题

def dataset3Params(X, y, Xval, yval,vals): #找到最优C和gamma """ Returns your choice of C and sigma. You should complete this function to return the optimal C and sigma based on a cross-validation set. """ acc = 0 best_c=0 #初始化C best_gamma=0 #初始化gamma for i in vals: #遍历vals中所有的参数C C= i for j in vals: #遍历所有C与gamma的组合 gamma = 1/j classifier = SVC(C=C,gamma=gamma) classifier.fit(X,y) prediction = classifier.predict(Xval) score = classifier.score(Xval,yval) if score>acc: acc =score best_c =C best_gamma=gamma return best_c, best_gamma

这是一个使用SVM模型进行参数选择的函数。函数输入包括训练集X和y、交叉验证集Xval和yval以及参数范围vals。该函数的输出是最优C和gamma的值。

函数中使用两个嵌套的for循环来遍历参数范围vals中所有的C和gamma的组合。对于每个组合，使用SVM模型进行训练，并在交叉验证集上进行预测和评分。如果当前评分比之前的最高评分要高，就更新最优的C和gamma的值。

最后，函数返回最优的C和gamma的值。

for i in vals

It seems like the code you provided is incomplete. The "vals" variable should be defined beforehand and there should be a colon at the end of the line. Could you provide more context or code for me to better understand your question?