【TensorFlow随手笔记】tensorboard踩过的坑

出错错误：

1. 无法正常显示

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直接点击网址无法访问

解决方案：
直接用 localhost:6006

错误二和三

二：
Expected dimension in the range [-1, 1), but got 1 [[Node: accuracy_5/ArgMax_1 = ArgMax[T=DT_FLOAT, Tidx=DT_INT32, output_type=DT_INT64, _device="/job:localhost/replica:0/task:0/device:CPU:0"](_arg_y_label_0_1, accuracy_5/ArgMax/dimension)]]

三：
InvalidArgumentError (see above for traceback): You must feed a value for placeholder tensor ' input_placeholder/ys_val-input' with dtype float and shape [378,77][[node input_placeholder/ys_val-input (defined at D:/新建文件夹/79class_claification/TF_CNN.py:121) = Placeholder[dtype=DT_FLOAT, shape=[378,77], _device="/job:localhost/replica:0/task:0/device:GPU:0"]()]] [[{{node handle_onehot_label/input_producer/input_producer/mul/_21}} = _Recv[client_terminated=false, recv_device="/job:localhost/replica:0/task:0/device:CPU:0", send_device="/job:localhost/replica:0/task:0/device:GPU:0", send_device_incarnation=1, tensor_name="edge_68_handle_onehot_label/input_producer/input_producer/mul", tensor_type=DT_FLOAT, _device="/job:localhost/replica:0/task:0/device:CPU:0"]()]]
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思考问题

以上两个问题老是在修改后，调bug过程中不断交互出现。

我以前一直都是好用的，但是在我修改之后程序出现问题。
我本以为是修改后的 arg_max和argmax有区别。
我修改的部分主要为：分别写出两个过程一个针对traindata，一个针对val_data，因为两个的shape不一样，我用的又是一维卷积所以placeholder那里shape是固定写的。所以针对这两个过程分别加入tensorboard的scalar变量。主要是以下四个。
train_acc, val_acc, train_loss, val_loss

解决问题

经过分析可知，这种情况下不能直接用merged = tf.summary.merge_all()直接把train的标量和val的标量一起merge掉，并且在sess.run的过程中都是喂入 merged，正常来讲应该train和val各有一个merge，之后各自喂到各自的sess上。
修改代码demo如下即可：

  with tf.name_scope('loss_func'):
        cross_entropy = tf.losses.sparse_softmax_cross_entropy(logits=y_inference, labels=tf.arg_max(ys, 1))

        cross_entropy_val = tf.losses.sparse_softmax_cross_entropy(logits=yval_inference, labels=tf.argmax(ys_val, 1))

        loss = tf.reduce_mean(cross_entropy)
        loss_val = tf.reduce_mean(cross_entropy_val)

	    summary_losstrain = tf.summary.scalar('loss', loss)    ###################################
	    summary_lossval = tf.summary.scalar('loss_val', loss_val)

  with tf.name_scope('train_step_Optimizer'):
        train_step = tf.train.GradientDescentOptimizer(learning_rate=LEARNING_RATE_BASE).minimize(loss)
        
  with tf.name_scope('acc_train'):
        correct_prediction_train = tf.equal(tf.argmax(ys, 1), tf.argmax(y_inference, 1))
        accuracy_train = tf.reduce_mean(tf.cast(correct_prediction_train, tf.float32), name="accuracy_train")

   		summary_acc_train = tf.summary.scalar('accuracy_train', accuracy_train) ###################
	
    with tf.name_scope('acc_val'):
        correct_prediction_val = tf.equal(tf.argmax(ys_val, 1), tf.argmax(yval_inference, 1))
        accuracy_val = tf.reduce_mean(tf.cast(correct_prediction_val, tf.float32), name="accuracy_val")

        summary_acc_val = tf.summary.scalar('accuracy_val', accuracy_val)######################

    with tf.name_scope("save_model"):
        Saver = tf.train.Saver()

    with tf.Session() as sess:
        tf.local_variables_initializer().run()
        tf.global_variables_initializer().run()

        coord = tf.train.Coordinator()
        threads = tf.train.start_queue_runners(sess, coord)
        #merged = tf.summary.merge_all()
        # 修改后
        merged_train = tf.summary.merge([summary_losstrain, summary_acc_train])###########################
        merged_val = tf.summary.merge([summary_lossval, summary_acc_val])###############################
        #train_writer = tf.summary.FileWriter(LOG_DIR, sess.graph)

        train_writer = tf.summary.FileWriter(LOG_DIR + '/train', sess.graph)################################
        test_writer = tf.summary.FileWriter(LOG_DIR + '/test')##########################################

        yy_test_onehot, yy_val_onehot = sess.run([y_test_onehot, y_val_onehot])

        validate_feed = {xs_val: X_val, ys_val: yy_val_onehot}

        for epoch in range(TRAINING_STEPS):

            x_train_batchdata, y_train_batchdata = sess.run([x_train_batch, y_train_batch])

            summary_train = sess.run([merged_train], feed_dict={xs: x_train_batchdata, ys: y_train_batchdata})
            train_writer.add_summary(summary_train, epoch)

            summary_val= sess.run([merged_val], feed_dict=validate_feed)
            test_writer.add_summary(summary_val, epoch)