我在保存文本文件中訓練好的神經網絡的權重時遇到了問題。 這裏是我的代碼如何保存神經網絡的權重
def nNetwork(trainingData,filename):
lamda = 1
input_layer = 1200
output_layer = 10
hidden_layer = 25
X=trainingData[0]
y=trainingData[1]
theta1 = randInitializeWeights(1200,25)
theta2 = randInitializeWeights(25,10)
m,n = np.shape(X)
yk = recodeLabel(y,output_layer)
theta = np.r_[theta1.T.flatten(), theta2.T.flatten()]
X_bias = np.r_[np.ones((1,X.shape[0])), X.T]
#conjugate gradient algo
result = scipy.optimize.fmin_cg(computeCost,fprime=computeGradient,x0=theta,args=(input_layer,hidden_layer,output_layer,X,y,lamda,yk,X_bias),maxiter=100,disp=True,full_output=True)
print result[1] #min value
theta1,theta2 = paramUnroll(result[0],input_layer,hidden_layer,output_layer)
counter = 0
for i in range(m):
prediction = predict(X[i],theta1,theta2)
actual = y[i]
if(prediction == actual):
counter+=1
print str(counter *100/m) + '% accuracy'
data = {"Theta1":[theta1],
"Theta2":[theta2]}
op=open(filename,'w')
json.dump(data,op)
op.close()
def paramUnroll(params,input_layer,hidden_layer,labels):
theta1_elems = (input_layer+1)*hidden_layer
theta1_size = (input_layer+1,hidden_layer)
theta2_size = (hidden_layer+1,labels)
theta1 = params[:theta1_elems].T.reshape(theta1_size).T
theta2 = params[theta1_elems:].T.reshape(theta2_size).T
return theta1, theta2
我收到以下錯誤 加薪類型錯誤(再版(O)+ 「是不是JSON序列化」)
請給出一個解決方案或任何ot她的方式來保存權重,以便我可以輕鬆地加載他們在其他一些代碼。
無論theta1或theta2,或兩者兼而有之,是不是JSON序列化。它們是由函數paramUnroll返回的對象。那麼他們是什麼樣的對象? –
@PaulCornelius theta1和theta2是numpy數組 –
嘗試'theta1.tolist()'。請記住在從文件加載書寫列表後再次初始化'numpy.array' – jorgenkg