plt.plot(history.history['accuracy']) plt.title('model accuracy') plt.ylabel('accuracy') plt.xlabel('epoch') plt.legend(['train'], loc='upper left') plt.show() # 绘制训练loss plt.plot(history.history['loss']) plt.title('model loss') plt.ylabel('loss') plt.xlabel('epoch') plt.legend(['train'], loc='upper left') plt.show()绘制到一张图中

def compile_train(model, data_train, data_label,data_val,label_val, deep=True): if (deep == True): import matplotlib.pyplot as plt model.compile(loss='binary_crossentropy', optimizer = 'Adam', metrics=['accuracy']) history = model.fit(data_train, data_label,validation_data=(data_val,label_val) ,epochs=10, batch_size=256,verbose=1) plt.plot(history.history['accuracy']) plt.plot(history.history['loss']) plt.title('Train Accuracy and Loss') plt.ylabel('Accuracy/Loss') plt.xlabel('Epoch') plt.legend(['accuracy', 'loss'], loc='upper left') plt.show() plt.plot(history.history['val_accuracy']) plt.plot(history.history['val_loss']) plt.title('Verification Accuracy and Loss') plt.ylabel('Accuracy/Loss') plt.xlabel('Epoch') plt.legend(['accuracy', 'loss'], loc='upper left') plt.show() print('Model Compiled and Trained') return model改成应用于模型本身

plt.plot(history.history['accuracy']) plt.plot(history.history['loss']) plt.title('Train Accuracy and Loss') plt.ylabel('Accuracy/Loss') plt.xlabel('Epoch') plt.legend(['accuracy', 'loss'], loc=...

plt.plot(history.history[metric]) plt.plot(history.history['val_'+metric], '') plt.xlabel("Epochs") plt.ylabel(metric) plt.legend([metric, 'val_'+metric]) plt.show() plot_graphs(history, 'accuracy') plot_graphs(history, 'loss')

plt.plot函数用于绘制曲线，plt.xlabel和plt.ylabel函数分别用于设置x轴和y轴的标签，plt.legend函数用于设置图例。接下来，plot_graphs函数分别绘制了训练集和验证集在accuracy和loss指标上的变化曲线。这些曲线...

### 绘制训练和测试损失曲线 import matplotlib.pyplot as plt plt.plot(range(1, args.epochs + 1), train_acc, label='Training Acc') plt.plot(range(1, args.epochs + 1), test_acc, label='Test Acc') plt.xlabel('Epoch') plt.ylabel('Loss') plt.ylim(0, 1.01) plt.title('Training and Test Loss') plt.legend() plt.show() plt.savefig("Acc.png", dpi=300) #保存输出图片

plt.xlabel('Epoch') plt.ylabel('Accuracy') plt.ylim(0, 1.01) plt.title('Training and Test Accuracy') plt.legend() plt.show() plt.savefig("Acc.png", dpi=300) # 保存输出图片在这个示例中，train_...

def plot_training(history=None, metric='acc', title='Model Accuracy', loc='lower right'): model_list = [] fig = plt.figure(figsize=(10, 8)) for key, val in history.items(): model_list.append(key.replace(HISTORY_DIR, '').rstrip('.history')) plt.plot(val[metric]) plt.title(title) plt.ylabel(metric) plt.xlabel('epoch') plt.legend(model_list, loc=loc) plt.show()

metric参数指定绘制的指标，可以是"acc"（准确率）或"loss"（损失率），title参数指定图表标题，loc参数指定图例的位置。在函数中，首先创建一个画布，然后遍历历史数据字典中的每个模型，将其准确率或损失率绘制到...

markers = {'train': 'o', 'test': 's'} x = np.arange(max) print("训练",trainer.train_acc_list) print("测试",trainer.test_acc_list) plt.plot(x, trainer.train_acc_list, marker='o', label='train', markevery=2) plt.plot(x, trainer.test_acc_list, marker='s', label='test', markevery=2) plt.xlabel("epochs") plt.ylabel("accuracy") plt.ylim(0, 1.0) plt.legend(loc='lower right') plt.show()

- plt.xlabel 和 plt.ylabel 分别用来指定 x 轴和 y 轴的标签； - plt.ylim 用来指定 y 轴的上下限； - plt.legend 用来显示图例，其中 loc 参数用来指定图例的位置； - plt.show 用来显示绘制的图形。

import pandas as pd import numpy as np from sklearn.preprocessing import LabelEncoder, OneHotEncoder from keras.models import Sequential from keras.layers import Dense from keras.callbacks import History import matplotlib.pyplot as plt # 读取数据集 data = pd.read_csv('data-04-zoo.csv', header=None) # 切分x和y x = data.iloc[:, :-1].values y = data.iloc[:, -1].values # 对y标签进行独热编码处理 label_encoder = LabelEncoder() y = label_encoder.fit_transform(y) onehot_encoder = OneHotEncoder(sparse=False) y = y.reshape(len(y), 1) y = onehot_encoder.fit_transform(y) # 搭建网络模型 model = Sequential() model.add(Dense(16, input_dim=16, activation='relu')) model.add(Dense(8, activation='relu')) model.add(Dense(7, activation='softmax')) # 模型配置 model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy']) # 训练模型 history = History() model.fit(x, y, epochs=200, batch_size=16, validation_split=0.2, callbacks=[history]) # 绘制训练集和验证集的损失曲线 plt.plot(history.history['loss']) plt.plot(history.history['val_loss']) plt.title('Model Loss') plt.xlabel('Epoch') plt.ylabel('Loss') plt.legend(['Train', 'Validation'], loc='upper left') plt.show() # 绘制训练集和验证集的准确率曲线 plt.plot(history.history['accuracy']) plt.plot(history.history['val_accuracy']) plt.title('Model Accuracy') plt.xlabel('Epoch') plt.ylabel('Accuracy') plt.legend(['Train', 'Validation'], loc='upper left') plt.show() # 保存模型 model.save('model1.h5')from google.protobuf.internal import builder as _builder ImportError: cannot import name 'builder' from 'google.protobuf.internal' (C:\ProgramData\anaconda3\envs\demo\lib\site-packages\google\protobuf\internal\init.py)

这段代码中出现了 ImportError: cannot import name 'builder' from 'google.protobuf.internal' (C:\ProgramData\anaconda3\envs\demo\lib\site-packages\google\protobuf\internal\__init__.py) 的错误，这可能是...

import matplotlib.pyplot as plt import pandas as pd from keras.models import Sequential from keras import layers from keras import regularizers import os import keras import keras.backend as K import numpy as np from keras.callbacks import LearningRateScheduler data = "data.csv" df = pd.read_csv(data, header=0, index_col=0) df1 = df.drop(["y"], axis=1) lbls = df["y"].values - 1 wave = np.zeros((11500, 178)) z = 0 for index, row in df1.iterrows(): wave[z, :] = row z+=1 mean = wave.mean(axis=0) wave -= mean std = wave.std(axis=0) wave /= std def one_hot(y): lbl = np.zeros(5) lbl[y] = 1 return lbl target = [] for value in lbls: target.append(one_hot(value)) target = np.array(target) wave = np.expand_dims(wave, axis=-1) model = Sequential() model.add(layers.Conv1D(64, 15, strides=2, input_shape=(178, 1), use_bias=False)) model.add(layers.ReLU()) model.add(layers.Conv1D(64, 3)) model.add(layers.Conv1D(64, 3, strides=2)) model.add(layers.BatchNormalization()) model.add(layers.Dropout(0.5)) model.add(layers.Conv1D(64, 3)) model.add(layers.Conv1D(64, 3, strides=2)) model.add(layers.BatchNormalization()) model.add(layers.LSTM(64, dropout=0.5, return_sequences=True)) model.add(layers.LSTM(64, dropout=0.5, return_sequences=True)) model.add(layers.LSTM(32)) model.add(layers.Dropout(0.5)) model.add(layers.Dense(5, activation="softmax")) model.summary() save_path = './keras_model3.h5' if os.path.isfile(save_path): model.load_weights(save_path) print('reloaded.') adam = keras.optimizers.adam() model.compile(optimizer=adam, loss="categorical_crossentropy", metrics=["acc"]) # 计算学习率 def lr_scheduler(epoch): # 每隔100个epoch，学习率减小为原来的0.5 if epoch % 100 == 0 and epoch != 0: lr = K.get_value(model.optimizer.lr) K.set_value(model.optimizer.lr, lr * 0.5) print("lr changed to {}".format(lr * 0.5)) return K.get_value(model.optimizer.lr) lrate = LearningRateScheduler(lr_scheduler) history = model.fit(wave, target, epochs=400, batch_size=128, validation_split=0.2, verbose=2, callbacks=[lrate]) model.save_weights(save_path) print(history.history.keys()) # summarize history for accuracy plt.plot(history.history['acc']) plt.plot(history.history['val_acc']) plt.title('model accuracy') plt.ylabel('accuracy') plt.xlabel('epoch') plt.legend(['train', 'test'], loc='upper left') plt.show() # summarize history for loss plt.plot(history.history['loss']) plt.plot(history.history['val_loss']) plt.title('model loss') plt.ylabel('loss') plt.xlabel('epoch') plt.legend(['train', 'test'], loc='upper left') plt.show()

这段代码是用来训练一个深度学习模型的代码，使用了Keras和Tensorflow进行模型的搭建、训练和保存。该模型包含了卷积层、批量归一化层、Dropout层、LSTM层和全连接层，并且最终使用softmax激活函数得到预测的类别。...

fig, ax1 = plt.subplots() ax1.plot(train_losses, label='Train Loss') ax1.plot(train_accs, label='Train Acc') ax1.set_ylim([0, 1]) ax1.yaxis.set_major_locator(y_major_locator) ax1.set_xlabel('Epoch') ax1.set_ylabel('Loss/Accuracy') ax1.legend() 使两条曲线线条有差别

ax1.set_ylabel('Loss/Accuracy') ax1.legend() 2. 使用不同的线型： fig, ax1 = plt.subplots() ax1.plot(train_losses, label='Train Loss', linestyle='--') ax1.plot(train_accs, label='Train Acc', ...

import tensorflow as tf from tensorflow.keras import datasets, layers, models, optimizers from tensorflow.keras.preprocessing import image_dataset_from_directory import matplotlib.pyplot as plt # 定义数据集路径 data_dir = r'F:\Pycham\project\data\FMD' # 定义图像大小和批处理大小 image_size = (224, 224) batch_size = 32 # 从目录中加载训练数据集 train_ds = image_dataset_from_directory( data_dir, validation_split=0.2, subset="training", seed=123, image_size=image_size, batch_size=batch_size) # 从目录中加载验证数据集 val_ds = image_dataset_from_directory( data_dir, validation_split=0.2, subset="validation", seed=123, image_size=image_size, batch_size=batch_size) # 构建卷积神经网络模型 model = models.Sequential() model.add(layers.experimental.preprocessing.Rescaling(1./255, input_shape=(image_size[0], image_size[1], 3))) model.add(layers.Conv2D(32, (3, 3), activation='selu')) model.add(layers.MaxPooling2D((2, 2))) model.add(layers.Conv2D(64, (3, 3), activation='selu')) model.add(layers.MaxPooling2D((2, 2))) model.add(layers.Conv2D(64, (3, 3), activation='selu')) model.add(layers.Conv2D(128, (3, 3), activation='selu')) model.add(layers.MaxPooling2D((2, 2))) # 添加全连接层 model.add(layers.Flatten()) model.add(layers.Dense(128, activation='selu')) model.add(layers.Dropout(0.5)) model.add(layers.Dense(64, activation='selu')) model.add(layers.Dense(10)) # 编译模型，使用 SGD 优化器和 Categorical Crossentropy 损失函数 model.compile(optimizer=optimizers.SGD(learning_rate=0.01, momentum=0.9), loss=tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True), metrics=['accuracy']) # 训练模型，共训练 20 轮 history = model.fit(train_ds, epochs=5, validation_data=val_ds) # 绘制训练过程中的准确率和损失曲线 plt.plot(history.history['accuracy'], label='accuracy') plt.plot(history.history['val_accuracy'], label = 'val_accuracy') plt.xlabel('Epoch') plt.ylabel('Accuracy') plt.ylim([0.5, 1]) plt.legend(loc='lower right') plt.show() # 在测试集上评估模型准确率 test_loss, test_acc = model.evaluate(val_ds) print(f'测试准确率: {test_acc}')上述代码得出的准确率仅为0.5，请你通过修改学习率等方式修改代码，假设数据集路径为F:\Pycham\project\data\FMD

plt.plot(history.history['accuracy'], label='accuracy') plt.plot(history.history['val_accuracy'], label = 'val_accuracy') plt.xlabel('Epoch') plt.ylabel('Accuracy') plt.ylim([0.5, 1]) plt.legend(loc='...

为什么运行这一段代码，没有生成结果 def plot_model_history(model_history): """ Plot Accuracy and Loss curves given the model_history """ fig, axs = plt.subplots(1, 2, figsize=(15, 5)) # summarize history for accuracy axs[0].plot(range(1, len(model_history.history['acc']) + 1), model_history.history['acc']) axs[0].plot(range(1, len(model_history.history['val_acc']) + 1), model_history.history['val_acc']) axs[0].set_title('Model Accuracy') axs[0].set_ylabel('Accuracy') axs[0].set_xlabel('Epoch') axs[0].set_xticks(np.arange(1, len(model_history.history['acc']) + 1), len(model_history.history['acc']) / 10) axs[0].legend(['train', 'val'], loc='best') # summarize history for loss axs[1].plot(range(1, len(model_history.history['loss']) + 1), model_history.history['loss']) axs[1].plot(range(1, len(model_history.history['val_loss']) + 1), model_history.history['val_loss']) axs[1].set_title('Model Loss') axs[1].set_ylabel('Loss') axs[1].set_xlabel('Epoch') axs[1].set_xticks(np.arange(1, len(model_history.history['loss']) + 1), len(model_history.history['loss']) / 10) axs[1].legend(['train', 'val'], loc='best') fig.savefig('plot.png') plt.show()

可能是因为缺少了必要的库导入，需要导入如下库： python import matplotlib.pyplot as plt import numpy as np 若已经导入了这两个库，可能需要检查传入函数中的参数是否正确或存在错误。

# 创建插值数据点 interp_x = np.linspace(0, len(train_losses) - 1, 1000) # 训练损失曲线 interp_train_losses = np.interp(interp_x, range(len(train_losses)), train_losses) plt.plot(interp_x, interp_train_losses, label='Train Loss') # 测试损失曲线 interp_test_losses = np.interp(interp_x, range(len(test_losses)), test_losses) plt.plot(interp_x, interp_test_losses, label='Test Loss') # 训练准确率曲线 interp_train_accs = np.interp(interp_x, range(len(train_accs)), train_accs) plt.plot(interp_x, interp_train_accs, label='Train Acc') # 测试准确率曲线 interp_test_accs = np.interp(interp_x, range(len(test_accs)), test_accs) plt.plot(interp_x, interp_test_accs, label='Test Acc') # 设置y轴范围为0~1 plt.ylim([0, 1]) # 显示图例 plt.legend() # 显示图像 plt.show() 怎样使训练集的两条曲线在一张图上，测试集的两条曲线在另一张图上？

在第一个子图上，我们使用 matplotlib.pyplot.plot 函数绘制训练集的损失和准确率曲线，并使用 matplotlib.axes.Axes.set_xlabel 和 matplotlib.axes.Axes.set_ylabel 函数设置坐标轴标签。在第二个子图上，...

print(minist_model.history) Loss = minist_model.history['loss']val_loss = minist_model.history['val_loss'] accuracy = minist_model.historyl'accuracy']val_accuracy = minist_model.history['val_accuracy']print(loss) def draw_loss(loss, al_loss):

To draw the loss curve, you can use the matplotlib library in Python. Here's an example code snippet: ...This will show a plot with the training loss and validation loss for each epoch.

plot_model_history

plt.plot(history.history['accuracy']) plt.plot(history.history['val_accuracy']) plt.title('Model Accuracy') plt.xlabel('Epoch') plt.ylabel('Accuracy') plt.legend(['train', 'val'], loc='upper ...

keras训练完之后可视化每次epoch的loss 以及 accuracy

plt.plot(history.history['accuracy']) plt.plot(history.history['val_accuracy']) plt.title('Model Accuracy') plt.ylabel('Accuracy') plt.xlabel('Epoch') plt.legend(['train', 'test'], loc='lower right') ...

plt.plot(history.history['accuracy']) plt.plot(history.history['loss']) plt.title('Train Accuracy and Loss') plt.ylabel('Accuracy/Loss') plt.xlabel('Epoch') plt.legend(['accuracy', 'loss'], loc='upper left') plt.show()

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plt.plot(history.history[metric]) plt.plot(history.history['val_'+metric], '') plt.xlabel("Epochs") plt.ylabel(metric) plt.legend([metric, 'val_'+metric]) plt.show() plot_graphs(history, 'accuracy') plot_graphs(history, 'loss')

fig, ax1 = plt.subplots() ax1.plot(train_losses, label='Train Loss') ax1.plot(train_accs, label='Train Acc') ax1.set_ylim([0, 1]) ax1.yaxis.set_major_locator(y_major_locator) ax1.set_xlabel('Epoch') ax1.set_ylabel('Loss/Accuracy') ax1.legend() 使两条曲线线条有差别

print(minist_model.history) Loss = minist_model.history['loss']val_loss = minist_model.history['val_loss'] accuracy = minist_model.historyl'accuracy']val_accuracy = minist_model.history['val_accuracy']print(loss) def draw_loss(loss, al_loss):

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