标签:optimize lis err 预测 随机梯度下降 name 关系 nump sgd
import paddle.fluid as fluid
import numpy
#定义数据
train_data = [[0], [1], [2], [3], [4], [5], [10]]
y_true = [[3], [13], [23], [33], [43], [53], [103]]
#定义网络
x = fluid.layers.data(name="x", shape=[1], dtype="float32")
y = fluid.layers.data(name="y", shape=[1], dtype="float32")
y_predict = fluid.layers.fc(input=x, size=1, act=None) # 定义x与其有关系
#定义损失函数
cost = fluid.layers.square_error_cost(input=y_predict,label=y)#平方差损失函数
avg_cost = fluid.layers.mean(cost)#求平均损失
#定义优化方法
sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.01)#定义SGD-随机梯度下降的学习率
sgd_optimizer.minimize(avg_cost)
cpu = fluid.CPUPlace()#此处使用CPU进行训练 GPU训练则移步之后更新的文章
exe = fluid.Executor(cpu)#Executor是执行器
prog=fluid.default_startup_program()#将刚刚定义的一堆堆赋值给prog这个变量名
exe.run(prog)#准备开始!
for i in range(500):
for data_id in range(len(y_true)):
# 需转换为numpy数组类型,这样可以传入训练
data_x=numpy.array(train_data[data_id]).astype("float32").reshape((1,1))
data_y = numpy.array(y_true[data_id]).astype("float32").reshape((1,1))
outs = exe.run(
feed={‘x‘:data_x , ‘y‘: data_y},
fetch_list=[y_predict.name, avg_cost]) # feed为数据表 输入数据和标签数据
print("正在训练第" + str(i + 1) + "次")
# 观察结果
print(outs)
# 保存预测模型
dirname = "./test01.inference.model/"
fluid.io.save_inference_model(dirname, [‘x‘], [y_predict], exe)
######################################################################################
import paddle.fluid as fluid
import numpy
import paddle.fluid as fluid
import numpy
dirname = "./test01.inference.model/"
cpu = fluid.CPUPlace()
exe = fluid.Executor(cpu)
# 加载模型
[inference_program, feed_target_names, fetch_targets] = fluid.io.load_inference_model(dirname, exe)
# 目标数据
datatype = "float32"
test_data = numpy.array([[input("请输入数值")]]).astype(datatype)
# 启动预测
results = exe.run(inference_program,
feed={feed_target_names[0]: test_data},
fetch_list=fetch_targets)
print(results[0][0])
标签:optimize lis err 预测 随机梯度下降 name 关系 nump sgd
原文地址:https://www.cnblogs.com/zhulimin/p/13194503.html