lwr.py 文件源码

def learn(X, Y, datapoint):
    global alpha

    datapoint = np.mat(datapoint)
    Y = np.mat(Y)
    X = np.mat(X)

    weights = getWeights(X, datapoint)

    den = (X*weights)*X.T
    num = (X*weights)*Y.T

    try:
        return num*den.I
    except:
        return None