Keras中自定义指标函数出现错误

Question

我在Keras中定义了一个自定义函数来计算R平方度量。我在keras后端使用了以下代码：

import keras.backend as K
def Rsqured(y_true,y_pred):

    y_true = K.batch_flatten(y_true)
    y_pred = K.batch_flatten(y_pred)

    y_tr_mean = K.mean(y_true)
    y_pr_mean = K.mean(y_pred)

    num = K.sum((y_true-y_tr_mean) * (y_pred-y_pr_mean))
    num = num^2

    denom = K.sum((y_true-y_tr_mean)*(y_true-y_tr_mean)) * K.sum((y_pred- 
    y_pr_mean)*(y_pred-y_pr_mean))

    return num

/德诺

后来，当我把它称为我的模型时：

model.compile(optimizer='adam',loss='mean_squared_error', metrics=[Rsqured])

我得到以下错误：

Input 'x' of 'LogicalOr' Op has type int64 that does not match expected type of bool.

Answer 1

问题就在这里：num = num^2^是按位异或运算符。你想要**