test_len = 40 for i in range(train_size, len(new_data_x)): # 要预测的是i' test_x = new_data_x[i - test_len:i, np.newaxis, :] test_x = preminmaxscaler(test_x, train_x_minmax[0], train_x_minmax[1]) batch_test_x = torch.tensor(test_x, dtype=torch.float32, device=device) if i == train_size: test_y, hc = net.output_y_hc(batch_test_x, (zero_ten, zero_ten)) else: test_y, hc = net.output_y_hc(batch_test_x, hc) # test_y = net(batch_test_x) predict_y = test_y[-1].item() predict_y = unminmaxscaler(predict_y, train_x_minmax[0], train_y_minmax[1]) new_data_x[i] = predict_y # 绘制图 plt.plot(new_data_x, 'r', label='pred') plt.plot(data_x, 'b', label='real', alpha=0.3) plt.legend(loc='best')

Dropout_vs_Bootstrap:相关代码来比较Dropout方法和Bootstrap方法之间的JSD距离

bootstrap_models = [resample(X_train, replace=True, n_samples=len(X_train)) for _ in range(10)] # 模型训练和预测 dropout_model.compile(optimizer='adam', loss='binary_crossentropy', metrics=['accuracy...

Add_Practice_全连接神经网络_

for i in range(len(self.weights) - 1): activation = np.maximum(0, np.dot(self.weights[i], activation) + self.biases[i]) output = np.exp(np.dot(self.weights[-1], activation) + self.biases[-1]) / np....

ran_data = dataset for i in range(len(ran_data)); print(ran_data[i]) train_size= int(len(ran_data)*0.7) test_size=len(ran_data)-train_size train_dataset,test_dataset=torch.utils.data.random_split(ran_data,[train_size, test_size])

test_size = len(ran_data) - train_size train_dataset, test_dataset = random_split(ran_data, [train_size, test_size]) for data in train_dataset: print(data) for data in test_dataset: print(data) ...

custom_dataset = MyDataSet(random_data) for i in range(len(custom_dataset)): print(custom_dataset[i]) train_size = int(len(custom_dataset) * 0.7) test_size = len(custom_dataset) - train_size train_dataset, test_dataset = torch.utils.data.random_split(custom_dataset, [train_size, test_size])

在这里，使用了 train_size 和 test_size 来指定训练集和测试集的大小。最后，将划分后的训练集和测试集分别赋值给了 train_dataset 和 test_dataset 变量。通过这段代码，您可以实现将自定义数据集划分...

x_train, x_test, y_train, y_test = train_test_split(x_train, y_train, test_size=0.2, random_state=42) x_train, x_validate, y_train, y_validate = train_test_split(x_train, y_train, test_size=0.1, random_state=999) # Resize images for i in range(len(x_train)): img = Image.fromarray(x_train[i]) img = img.resize((224, 224)) x_train[i] = np.array(img) for i in range(len(x_validate)): img = Image.fromarray(x_validate[i]) img = img.resize((224, 224)) x_validate[i] = np.array(img) # Reshape images x_train = x_train.reshape(x_train.shape[0], 224, 224, 3) x_validate = x_validate.reshape(x_validate.shape[0], 224, 224, 3)代码段报错TypeError: Cannot handle this data type

这个错误可能是由于图片数据的格式不被支持而导致的。常见的图片格式有PNG、JPEG、BMP等，如果图片格式不被支持，就会出现这个错误。你可以尝试使用Pillow库中的Image.open()方法打开图片，然后使用np.array()方法...

import numpy as np import matplotlib.pyplot as plt import pickle as pkl import pandas as pd import tensorflow.keras from tensorflow.keras.models import Sequential, Model, load_model from tensorflow.keras.layers import LSTM, GRU, Dense, RepeatVector, TimeDistributed, Input, BatchNormalization, \ multiply, concatenate, Flatten, Activation, dot from sklearn.metrics import mean_squared_error,mean_absolute_error from tensorflow.keras.optimizers import Adam from tensorflow.python.keras.utils.vis_utils import plot_model from tensorflow.keras.callbacks import EarlyStopping from keras.callbacks import ReduceLROnPlateau df = pd.read_csv('lorenz.csv') signal = df['signal'].values.reshape(-1, 1) x_train_max = 128 signal_normalize = np.divide(signal, x_train_max) def truncate(x, train_len=100): in_, out_, lbl = [], [], [] for i in range(len(x) - train_len): in_.append(x[i:(i + train_len)].tolist()) out_.append(x[i + train_len]) lbl.append(i) return np.array(in_), np.array(out_), np.array(lbl) X_in, X_out, lbl = truncate(signal_normalize, train_len=50) X_input_train = X_in[np.where(lbl <= 9500)] X_output_train = X_out[np.where(lbl <= 9500)] X_input_test = X_in[np.where(lbl > 9500)] X_output_test = X_out[np.where(lbl > 9500)] # Load model model = load_model("model_forecasting_seq2seq_lstm_lorenz.h5") opt = Adam(lr=1e-5, clipnorm=1) model.compile(loss='mean_squared_error', optimizer=opt, metrics=['mae']) #plot_model(model, to_file='model_plot.png', show_shapes=True, show_layer_names=True) # Train model early_stop = EarlyStopping(monitor='val_loss', patience=20, verbose=1, mode='min', restore_best_weights=True) #reduce_lr = ReduceLROnPlateau(monitor='val_loss', factor=0.2, patience=9, verbose=1, mode='min', min_lr=1e-5) #history = model.fit(X_train, y_train, epochs=500, batch_size=128, validation_data=(X_test, y_test),callbacks=[early_stop]) #model.save("lstm_model_lorenz.h5") # 对测试集进行预测 train_pred = model.predict(X_input_train[:, :, :]) * x_train_max test_pred = model.predict(X_input_test[:, :, :]) * x_train_max train_true = X_output_train[:, :] * x_train_max test_true = X_output_test[:, :] * x_train_max # 计算预测指标 ith_timestep = 10 # Specify the number of recursive prediction steps # List to store the predicted steps pred_len =2 predicted_steps = [] for i in range(X_output_test.shape[0]-pred_len+1): YPred =[],temdata = X_input_test[i,:] for j in range(pred_len): Ypred.append (model.predict(temdata)) temdata = [X_input_test[i,j+1:-1],YPred] # Convert the predicted steps into numpy array predicted_steps = np.array(predicted_steps) # Plot the predicted steps #plt.plot(X_output_test[0:ith_timestep], label='True') plt.plot(predicted_steps, label='Predicted') plt.legend() plt.show()

这段代码看起来是一个用于时间序列预测的深度学习模型。该模型使用了序列到序列 LSTM (Seq2Seq LSTM) 模型进行预测，使用了 EarlyStopping 回调函数来避免过度拟合，并使用 Adam 优化器来进行模型优化。具体来说，...

# Split the dataset x_train, x_test, y_train, y_test = train_test_split(x_train, y_train, test_size=0.2, random_state=42) x_train, x_validate, y_train, y_validate = train_test_split(x_train, y_train, test_size=0.1, random_state=999) # Resize images for i in range(len(x_train)): img = Image.fromarray(x_train[i]) img = img.resize((224, 224)) x_train[i] = np.array(img) for i in range(len(x_validate)): img = Image.fromarray(x_validate[i]) img = img.resize((224, 224)) x_validate[i] = np.array(img) # Reshape images x_train = x_train.reshape(x_train.shape[0], 224, 224, 3) x_validate = x_validate.reshape(x_validate.shape[0], 224, 224, 3)代码段报错TypeError: Cannot handle this data type如何解决

这个错误提示表明你试图使用无法处理的数据类型。可能原因是你的代码中存在错误，或者是你的输入数据类型不正确。建议你检查代码中的变量和数组的数据类型，确保它们符合你的预期。你可以使用print语句来打印变量的...

import os import pandas as pd from tsfresh import extract_features, select_features from tsfresh.utilities.dataframe_functions import impute # 定义文件夹路径 train_folder_path = 'IEEE PHM 2012/Learning_set/Bearing1_1' test_folder_path = 'IEEE PHM 2012/Test_set/Bearing1_3' # 定义文件名前缀 file_prefix = 'acc_' # 定义文件扩展名 file_ext = '.csv' # 定义数据集列表 train_data = [] test_data = [] # 循环读取训练集文件 for i in range(1, 7): train_file_path = os.path.join(train_folder_path, file_prefix + '{:05d}'.format(i) + file_ext) train_data.append(pd.read_csv(train_file_path, header=None)) # 循环读取测试集文件 for i in range(1, 5): test_file_path = os.path.join(test_folder_path, file_prefix + '{:05d}'.format(i) + file_ext) test_data.append(pd.read_csv(test_file_path, header=None)) train_features = [] test_features = [] # 提取训练集特征 for i in range(len(train_data)): features = extract_features(train_data[i], column_id=0, column_sort=1) train_features.append(features) # 提取测试集特征 for i in range(len(test_data)): features = extract_features(test_data[i], column_id=0, column_sort=1) test_features.append(features) # 将特征转化为pandas DataFrame并保存到csv文件中 train_features_df = pd.concat(train_features) train_features_df.to_csv('train_features.csv', index=False) test_features_df = pd.concat(test_features) test_features_df.to_csv('test_features.csv', index=False)以上代码有何问题

features = extract_features(train_data[i], column_id=0, column_sort=1) 3. 在将特征转换为 pandas DataFrame 时，需要使用 pd.concat 函数将所有特征连接起来。同时，需要将 index 参数设置为 False...

dataset = CocoDetection(root=r'D:\file\study\data\COCO2017\train2017', annFile=r'D:\file\study\data\COCO2017\annotations\instances_train2017.json', transforms=transforms.Compose([transforms.ToTensor()])) # 定义训练集和测试集的比例 train_ratio = 0.8 test_ratio = 0.2 # 计算训练集和测试集的数据数量 num_data = len(dataset) num_train_data = int(num_data * train_ratio) num_test_data = num_data - num_train_data # 使用random_split函数将数据集划分为训练集和测试集 train_dataset, test_dataset = random_split(dataset, [num_train_data, num_test_data]) # 打印训练集和测试集的数据数量 print(f"Number of training data: {len(train_dataset)}") print(f"Number of test data: {len(test_dataset)}") train_loader = DataLoader(train_dataset, batch_size=8, shuffle=True, num_workers=0) test_loader = DataLoader(test_dataset, batch_size=8, shuffle=True, num_workers=0) # define the optimizer and the learning rate scheduler params = [p for p in model.parameters() if p.requires_grad] optimizer = torch.optim.SGD(params, lr=0.005, momentum=0.9, weight_decay=0.0005) lr_scheduler = torch.optim.lr_scheduler.StepLR(optimizer, step_size=3, gamma=0.1) # train the model for 10 epochs num_epochs = 10 for epoch in range(num_epochs): # 将模型设置为训练模式 model.train() # 初始化训练损失的累计值 train_loss = 0.0 # 构建一个迭代器，用于遍历数据集 for i, images, targets in train_loader: print(images) print(targets) # 将数据转移到设备上 images = list(image.to(device) for image in images) targets = [{k: v.to(device) for k, v in t.items()} for t in targets]上述代码报错：TypeError: call() takes 2 positional arguments but 3 were given

for i, (images, targets) in enumerate(train_loader): # do something with images and targets 这样，你就可以使用enumerate函数获取每个批次数据的索引，同时获取图像和目标。同时，如果你希望在训练...

def data_split(sequence, n_timestamp): subset = [] for i in range(len(sequence)): end_ix = i + n_timestamp if end_ix > len(sequence) - 1: break seq = sequence[i:end_ix+1].reshape(n_timestamp+1,) subset.append(seq) subset = np.array(subset, dtype='float32') return subset train_data = data_split(training_set_scaled, n_timestamp) # train_data = train_data.reshape(train_data.shape[0], train_data.shape[1]) test_data = data_split(testing_set_scaled, n_timestamp) # test_data = test_data.reshape(test_data.shape[0], test_data.shape[1]) print(train_data.shape, test_data.shape) print(train_data[3492])

接下来，将train_data和test_data打印出来以检查它们的形状是否正确。最后一行代码打印出了train_data中第3492个样本，以便您检查数据是否正确。如果您需要查看其他样本，可以将train_data中的索引号替换为其他数字...

import numpy as np import pandas as pd import tensorflow as tf from sklearn.preprocessing import MinMaxScaler from sklearn.metrics import r2_score,median_absolute_error,mean_absolute_error # 读取数据 data = pd.read_csv(r'C:/Users/Ljimmy/Desktop/yyqc/peijian/销量数据rnn.csv') dataset = data.values # 数据归一化 scaler = MinMaxScaler(feature_range=(0, 1)) dataset = scaler.fit_transform(dataset) # 分割训练集和测试集 train_size = int(len(dataset) * 0.67) test_size = len(dataset) - train_size train, test = dataset[0:train_size, :], dataset[train_size:len(dataset), :] # 将数据集转化为适合GRU的数据格式 def create_dataset(dataset): X, Y = [], [] for i in range(len(dataset)-1): a = dataset[i:(i+1), :] X.append(a) Y.append(dataset[i+1, :]) return np.array(X), np.array(Y) train_X, train_Y = create_dataset(train) train_Y = train_Y[:, 2:] # 取第三列及以后的数据 test_X, test_Y = create_dataset(test) test_Y = test_Y[:, 2:] # 取第三列及以后的数据 # 定义GRU模型 model = tf.keras.Sequential([ tf.keras.layers.GRU(units=64, return_sequences=True, input_shape=(1, 3)), tf.keras.layers.GRU(units=32), tf.keras.layers.Dense(3)]) # 编译模型 model.compile(optimizer='adam', loss='mse') # 训练模型 model.fit(train_X, train_Y, epochs=100, batch_size=16, verbose=2) # 预测测试集 test_predict = model.predict(test_X) test_predict = scaler.inverse_transform(test_predict) #test_Y = scaler.inverse_transform(test_Y.reshape(-1, 1)) # 计算RMSE误差 rmse = np.sqrt(np.mean((test_predict - test_Y) ** 2)) print('Test RMSE:',rmse) # 预测下一个月的销量 last_month_sales = data.tail(1).values last_month_sales = scaler.transform(last_month_sales) next_month_sales = model.predict(np.array([last_month_sales])) next_month_sales = scaler.inverse_transform(next_month_sales) print('Next month sales:',next_month_sales[0][0])预测结果不够准确，如何增加准确率

有以下几种方式可以尝试提高准确率： 1. 增加训练数据量：可以尝试寻找更多的数据来进行训练，以提高模型的泛化能力和准确率。 2. 调整模型参数：可以尝试调整GRU模型的参数，如增加或减少GRU层的数量、增加或减少...

def set_clients(self, args, clientObj):# 设置客户端 for i in range(self.num_clients): train_data = read_client_data(self.dataset, i, is_train=True) test_data = read_client_data(self.dataset, i, is_train=False) client = clientObj(args, id=i, train_samples=len(train_data), test_samples=len(test_data)) self.clients.append(client)这段代码含义

接下来，使用 clientObj 类创建一个客户端对象 client，并将其 id 设置为当前循环的迭代次数 i，将该客户端的训练样本数和测试样本数分别设置为 len(train_data) 和 len(test_data)，并将其添加到 self.clients 列表...

def slice_enc(data, slice_rate=rate[1] + rate[2]): """将数据切分为前面多少比例，后面多少比例. :param data: 单挑数据 :param slice_rate: 验证集以及测试集所占的比例 :return: 切分好的数据 """ keys = data.keys() Train_Samples = {} Test_Samples = {} for i in keys: slice_data = data[i] all_lenght = len(slice_data) end_index = int(all_lenght * (1 - slice_rate)) samp_train = int(number * (1 - slice_rate)) # 700 Train_sample = [] Test_Sample = [] if enc: enc_time = length // enc_step samp_step = 0 # 用来计数Train采样次数 for j in range(samp_train): random_start = np.random.randint(low=0, high=(end_index - 2 * length)) label = 0 for h in range(enc_time): samp_step += 1 random_start += enc_step sample = slice_data[random_start: random_start + length] Train_sample.append(sample) if samp_step == samp_train: label = 1 break if label: break是做什么

函数中通过计算数据长度和slice_rate来确定切分位置，将数据分成训练集和测试集，然后在训练集中进行数据采样，其中samp_train表示训练集的长度，enc_time表示采样次数，samp_step用来计算采样次数，enc_...

def train(model, train_loader, criterion, optimizer): model.train() train_loss = 0.0 train_acc = 0.0 for i, (inputs, labels) in enumerate(train_loader): optimizer.zero_grad() outputs = model(inputs.unsqueeze(1).float()) loss = criterion(outputs, labels.long()) loss.backward() optimizer.step() train_loss += loss.item() * inputs.size(0) _, preds = torch.max(outputs, 1) train_acc += torch.sum(preds == labels.data) train_loss = train_loss / len(train_loader.dataset) train_acc = train_acc.double() / len(train_loader.dataset) return train_loss, train_acc def test(model, verify_loader, criterion): model.eval() test_loss = 0.0 test_acc = 0.0 with torch.no_grad(): for i, (inputs, labels) in enumerate(test_loader): outputs = model(inputs.unsqueeze(1).float()) loss = criterion(outputs, labels.long()) test_loss += loss.item() * inputs.size(0) _, preds = torch.max(outputs, 1) test_acc += torch.sum(preds == labels.data) test_loss = test_loss / len(test_loader.dataset) test_acc = test_acc.double() / len(test_loader.dataset) return test_loss, test_acc # Instantiate the model model = CNN() # Define the loss function and optimizer criterion = nn.CrossEntropyLoss() optimizer = optim.Adam(model.parameters(), lr=0.001) # Instantiate the data loaders train_dataset = MyDataset1('1MATRICE') train_loader = DataLoader(train_dataset, batch_size=5, shuffle=True) test_dataset = MyDataset2('2MATRICE') test_loader = DataLoader(test_dataset, batch_size=5, shuffle=False) train_losses, train_accs, test_losses, test_accs = [], [], [], [] for epoch in range(500): train_loss, train_acc = train(model, train_loader, criterion, optimizer) test_loss, test_acc = test(model, test_loader, criterion) train_losses.append(train_loss) train_accs.append(train_acc) test_losses.append(test_loss) test_accs.append(test_acc) print('Epoch: {} Train Loss: {:.4f} Train Acc: {:.4f} Test Loss: {:.4f} Test Acc: {:.4f}'.format( epoch, train_loss, train_acc, test_loss, test_acc))

代码中定义了两个函数：train和test，分别用于训练模型和测试模型。在训练过程中，首先将模型设置为训练模式，然后遍历训练数据集，对每个batch的数据进行前向传播、反向传播和优化器更新。在每个batch的训练结束...

为每句代码做注释：for class_name in class_names: current_class_data_path = os.path.join(src_data_folder, class_name) current_all_data = os.listdir(current_class_data_path) current_data_length = len(current_all_data) current_data_index_list = list(range(current_data_length)) random.shuffle(current_data_index_list) train_folder = os.path.join(os.path.join(target_data_folder, 'train'), class_name) val_folder = os.path.join(os.path.join(target_data_folder, 'val'), class_name) test_folder = os.path.join(os.path.join(target_data_folder, 'test'), class_name) train_stop_flag = current_data_length * train_scale val_stop_flag = current_data_length * (train_scale + val_scale) current_idx = 0 train_num = 0 val_num = 0 test_num = 0 for i in current_data_index_list: src_img_path = os.path.join(current_class_data_path, current_all_data[i]) if current_idx <= train_stop_flag: copy2(src_img_path, train_folder) train_num = train_num + 1 elif (current_idx > train_stop_flag) and (current_idx <= val_stop_flag): copy2(src_img_path, val_folder) val_num = val_num + 1 else: copy2(src_img_path, test_folder) # print("{}复制到了{}".format(src_img_path, test_folder)) test_num = test_num + 1 current_idx = current_idx + 1

for i in current_data_index_list: src_img_path = os.path.join(current_class_data_path, current_all_data[i]) # 如果当前索引在训练集截止点之前，则将数据复制到训练集 if current_idx <= train_stop_flag...

# Splitting training data into train & dev sets # if mode == 'train': # indices = [i for i in range(len(data)) if i % 10 != 0] # elif mode == 'dev': # indices = [i for i in range(len(data)) if i % 10 == 0] #baseline上面这段代码划分训练集和测试集按照顺序选择数据，可能造成数据分布问题，我改成随机选择 indices_tr, indices_dev = train_test_split([i for i in range(data.shape[0])], test_size = 0.1, random_state = 0) if self.mode == 'train': indices = indices_tr elif self.mode == 'dev': indices = indices_dev # Convert data into PyTorch tensors self.data = torch.FloatTensor(data[indices]) self.target = torch.FloatTensor(target[indices])

现在改成了随机选择数据进行划分，使用了train_test_split函数从范围为0到数据长度的列表中随机选择一定比例的索引，其中的10%作为开发集，而剩下的90%作为训练集。然后，将选择的数据转换为PyTorch的FloatTensor...

dataset = new_data.values train= dataset #valid = dataset[2187:,:] #converting dataset into x_train and y_train scaler = MinMaxScaler(feature_range=(0, 1)) scaled_data = scaler.fit_transform(dataset) x_train, y_train = [], [] for i in range(60,len(train)): x_train.append(scaled_data[i-60:i,0]) y_train.append(scaled_data[i,0]) x_train, y_train = np.array(x_train), np.array(y_train) x_train = np.reshape(x_train, (x_train.shape[0],x_train.shape[1],1)) # 重塑训练数据格式为三维形式 x_train = np.reshape(x_train, (x_train.shape[0], x_train.shape[1], 1)) # 创建 LSTM 模型 model = Sequential() model.add(LSTM(units=50, activation='relu', input_shape=(x_train.shape[1], 1))) model.add(Dense(1)) # 编译并拟合模型 model.compile(optimizer='adam', loss='mse') model.fit(x_train, y_train, epochs=10, batch_size=32, verbose=1) #predicting 246 values, using past 60 from the train data inputs = new_data[len(new_data) - 30 - 60:].values inputs = inputs.reshape(-1,1) inputs = scaler.transform(inputs) X_test = [] for i in range(60,inputs.shape[0]): X_test.append(inputs[i-60:i,0]) X_test = np.array(X_test) X_test = np.reshape(X_test, (X_test.shape[0],X_test.shape[1],1)) closing_price = model.predict(X_test)模型预测值为nan

根据代码，可能的原因有以下几种： 1. 数据集中可能存在缺失值或异常值。可以通过检查数据集来解决此问题。 2. 在进行数据归一化时，MinMaxScaler可能没有正确地处理数据。可以尝试使用其他归一化方法来处理数据。...

arr0 = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]) arr1 = np.array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]) arr2 = np.array(input("请输入连续24个月的车辆销售数据，元素之间用空格隔开：").split(), dtype=float) arr3 = np.array(input("请输入连续24个月的配件销售数据，元素之间用空格隔开：").split(), dtype=float) data_array = np.vstack((arr0, arr1, arr2, arr3)) data_matrix = data_array.T data = pd.DataFrame(data_matrix, columns=['num', 'month', 'car sales', 'sales']) data = data[['month', 'car sales', 'sales']] train_data, test_data = train_test_split(data, test_size=0.3) scaler = MinMaxScaler(feature_range=(0, 1)) data_scaled = scaler.fit_transform(data) train_size = int(len(data_scaled) * 0.7) test_size = len(data_scaled) - train_size train, test = data_scaled[0:train_size,:], data_scaled[train_size:len(data_scaled),:] def create_dataset(dataset, look_back=1): X, Y = [], [] for i in range(len(dataset)-look_back): X.append(dataset[i:(i+look_back), :]) Y.append(dataset[i+look_back, :]) return np.array(X), np.array(Y) look_back = 3 X_train, Y_train = create_dataset(train, look_back) X_test, Y_test = create_dataset(test, look_back) model = Sequential() model.add(LSTM(4, input_shape=(look_back, 3))) model.add(Dense(3)) model.compile(loss='mean_squared_error', optimizer='adam') model.fit(X_train, Y_train, epochs=100, batch_size=1, verbose=0) train_predict = model.predict(X_train) test_predict = model.predict(X_test) train_predict = scaler.inverse_transform(train_predict) Y_train = scaler.inverse_transform(Y_train) test_predict = scaler.inverse_transform(test_predict) Y_test = scaler.inverse_transform(Y_test) last_month = data_scaled[-look_back:] last_month = last_month.reshape((1, look_back, 3))#1，12，3 next_month = model.predict(last_month) next_month = scaler.inverse_transform(next_month) print('下个月的预测结果是:', round(next_month[0][2])),如何将以下代码插入，def comput_acc(real,predict,level): num_error=0 for i in range(len(real)): if abs(real[i]-predict[i])/real[i]>level: num_error+=1 return 1-num_error/len(real) a=np.array(test_data[label]) real_y=a real_predict=test_predict print("置信水平：{},预测准确率：{}".format(0.2,round(comput_acc(real_y,real_predict,0.2)* 100,2)),"%")

for i in range(len(real)): if abs(real[i] - predict[i]) / real[i] > level: num_error += 1 return 1 - num_error / len(real) a = np.array(test_data['sales']) real_y = a real_predict = test_predict...

import numpy as npimport pandas as pdfrom sklearn.preprocessing import MinMaxScalerfrom keras.models import Sequentialfrom keras.layers import Dense, Dropout, LSTMdf = pd.read_csv('AAPL.csv') # 载入股票数据# 数据预处理scaler = MinMaxScaler(feature_range=(0, 1))scaled_data = scaler.fit_transform(df['Close'].values.reshape(-1, 1))# 训练集和测试集划分prediction_days = 30x_train = []y_train = []for x in range(prediction_days, len(scaled_data)): x_train.append(scaled_data[x-prediction_days:x, 0]) y_train.append(scaled_data[x, 0])x_train, y_train = np.array(x_train), np.array(y_train)x_train = np.reshape(x_train, (x_train.shape[0], x_train.shape[1], 1))# 构建BP神经网络模型model = Sequential()model.add(LSTM(units=50, return_sequences=True, input_shape=(x_train.shape[1], 1)))model.add(Dropout(0.2))model.add(LSTM(units=50, return_sequences=True))model.add(Dropout(0.2))model.add(LSTM(units=50))model.add(Dropout(0.2))model.add(Dense(units=1))model.compile(optimizer='adam', loss='mean_squared_error')model.fit(x_train, y_train, epochs=25, batch_size=32)# 使用模型进行预测test_start = len(scaled_data) - prediction_daystest_data = scaled_data[test_start:, :]x_test = []for x in range(prediction_days, len(test_data)): x_test.append(test_data[x-prediction_days:x, 0])x_test = np.array(x_test)x_test = np.reshape(x_test, (x_test.shape[0], x_test.shape[1], 1))predicted_price = model.predict(x_test)predicted_price = scaler.inverse_transform(predicted_price)# 可视化预测结果import matplotlib.pyplot as pltplt.plot(df['Close'].values)plt.plot(range(test_start, len(df)), predicted_price)plt.show()介绍

这段代码实现了使用BP神经网络预测苹果公司股票价格，并对预测结果进行可视化。具体实现过程如下： 1. 载入股票数据：使用Pandas库中的read_csv函数读取CSV格式的股票数据。 2. 数据预处理：使用MinMaxScaler对...

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ran_data = dataset for i in range(len(ran_data)); print(ran_data[i]) train_size= int(len(ran_data)*0.7) test_size=len(ran_data)-train_size train_dataset,test_dataset=torch.utils.data.random_split(ran_data,[train_size, test_size])

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