莫烦TENSORFLOW(4)-placeholder

import tensorflow as tfimport numpy as np def add_layer(inputs,in_size,out_size,n_layer,activation_function=None): # add one more layer and return the output of this layer layer_name = 'layer%s' % n_layer with tf.name_scope('layer'): with tf.name_sco

import tensorflow as tfimport numpy as npimport matplotlib.pyplot as plt def add_layer(inputs,in_size,out_size,activation_function=None): Weights = tf.Variable(tf.random_normal([in_size,out_size])) biases = tf.Variable(tf.zeros([1,out_size]) + 0.1) W

import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data#number 1 to 10 datamnist = input_data.read_data_sets('MNIST_data',one_hot=True) def add_layer(inputs,in_size,out_size,activation_function=None): Weights = tf.Variable(t

import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data#number 1 to 10 datamnist = input_data.read_data_sets('MNIST_data',one_hot=True) def compute_accuracy(v_xs,v_ys): global prediction y_pre = sess.run(prediction,feed_dict

import tensorflow as tf state = tf.Variable(0,name='counter') one = tf.constant(1) new_value = tf.add(state,one)update = tf.assign(state,new_value) init = tf.initialize_all_variables()#must have if define variable with tf.Session() as sess: sess.run(

import tensorflow as tfimport numpy as np ##save to file#rember to define the same dtype and shape when restore# W = tf.Variable([[1,2,3],[3,4,5]],dtype=tf.float32,name='Weights')# b = tf.Variable([[1,2,3]],dtype=tf.float32,name='biases') # init = tf

import tensorflow as tfimport numpy as np #create datax_data = np.random.rand(100).astype(np.float32)y_data = x_data*0.1+0.3 ####create tensorflow structure start###Weights = tf.Variable(tf.random_uniform([1],-1.0,1.0))biases = tf.Variable(tf.zeros([

import os os.environ['TF_CPP_MIN_LOG_LEVEL']='2' import tensorflow as tfmatrix1 = tf.constant([[3,3]])matrix2 = tf.constant([[2],[2]])protuct = tf.matmul(matrix1,matrix2) # sess = tf.Session()# result = sess.run(protuct) # print(result)# sess.close()

1,感谢莫烦 2,第一个实例:用tf拟合线性函数 import tensorflow as tf import numpy as np # create data x_data = np.random.rand(100).astype(np.float32) y_data = x_data*0.1 + 0.3 #先创建我们的线性函数目标 #搭建模型 Weights = tf.Variable(tf.random_uniform([1], -1.0, 1.0)) biases = tf.Varia