import pandas as pd from sklearn.preprocessing import MinMaxScaler from sklearn.model_selection import train_test_split from keras.models import Sequential from keras.layers import Dense from keras.models import load_model model = load_model('model.h5') # 读取Excel文件 data = pd.read_excel('D://数据1.xlsx', sheet_name='4') # 把数据分成输入和输出 X = data.iloc[:, 0:5].values y = data.iloc[:, 0:5].values # 对输入和输出数据进行归一化 scaler_X = MinMaxScaler(feature_range=(0, 6)) X = scaler_X.fit_transform(X) scaler_y = MinMaxScaler(feature_range=(0, 6)) y = scaler_y.fit_transform(y) # 将数据集分成训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=0) # 创建神经网络模型 model = Sequential() model.add(Dense(units=4, input_dim=4, activation='relu')) model.add(Dense(units=36, activation='relu')) model.add(Dense(units=4, activation='relu')) model.add(Dense(units=4, activation='linear')) # 编译模型 model.compile(loss='mean_squared_error', optimizer='sgd') # 训练模型 model.fit(X_train, y_train, epochs=100, batch_size=1257) # 评估模型 score = model.evaluate(X_test, y_test, batch_size=30) print('Test loss:', score) # 使用训练好的模型进行预测 X_test_scaled = scaler_X.transform(X_test) y_pred = model.predict(X_test_scaled) # 对预测结果进行反归一化 y_pred_int = scaler_y.inverse_transform(y_pred).round().astype(int) # 构建带有概率的预测结果 y_pred_prob = pd.DataFrame(y_pred_int, columns=data.columns[:4]) mse = ((y_test - y_pred) ** 2).mean(axis=None) y_pred_prob['Probability'] = 1 / (1 + mse - ((y_pred_int - y_test) ** 2).mean(axis=None)) # 过滤掉和值超过6或小于6的预测值 y_pred_filtered = y_pred_prob[(y_pred_prob.iloc[:, :4].sum(axis=1) == 6)] # 去除重复的行 y_pred_filtered = y_pred_filtered.drop_duplicates() # 重新计算低于1.2的 Probability 值 low_prob_indices = y_pred_filtered[y_pred_filtered['Probability'] < 1.5].index for i in low_prob_indices: y_pred_int_i = y_pred_int[i] y_test_i = y_test[i] mse_i = ((y_test_i - y_pred_int_i) ** 2).mean(axis=None) new_prob_i = 1 / (1 + mse_i - ((y_pred_int_i - y_test_i) ** 2).mean(axis=None)) y_pred_filtered.at[i, 'Probability'] = new_prob_i # 打印带有概率的预测结果 print('Predicted values with probabilities:') print(y_pred_filtered)

pd_split_train_test.rar_pandas_pandas对数据分类_pd.split_split_数据分类

使用pandas对数据分类,对训练集测试集进行分类

import pandas as pd.docx

详解pandas库pd.read_excel操作读取excel文件参数整理与实例

主要介绍了pandas库pd.read_excel操作读取excel文件参数整理与实例，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

import numpy as np import matplotlib.pyplot as plt import pandas as pd import math from keras.models import Sequential from keras.layers import Dense, Activation, Dropout, LSTM from sklearn.preprocessing import MinMaxScaler from sklearn.metrics import mean_squared_error from keras import optimizers import time引入哪些库及这些库的作用

5. keras.models.Sequential：提供了一种顺序模型的方式来组织深度学习网络，方便生成、训练和评估模型。 6. keras.layers.Dense：Dense层是神经网络中最基本的层之一，每个输入节点都连接到输出节点。 7. keras....

import numpy as np import pandas as pd from sklearn.preprocessing import MinMaxScaler from keras.models import Sequential from keras.layers import Dense, Dropout,LSTM,SimpleRNN,GRU np.random.seed(10) # 指定乱数种子 # 载入Google股价的训练数据集 df_train = pd.read_csv("",index_col="Date",parse_dates=True) df_train这个代码怎么载入数据

在代码中的pd.read_csv()函数中，""中需要填写数据集文件的路径和文件名（包括文件格式后缀）。index_col参数用于指定读取数据集时使用哪一列作为索引列，parse_dates=True参数用于将日期数据解析为日期格式...

import pandas as pd from sklearn.preprocessing import MinMaxScaler from sklearn.model_selection import train_test_split from keras.models import Sequential from keras.layers import Dense from keras.models import load_model model = load_model('model.h5') # 读取Excel文件 data = pd.read_excel('D://数据1.xlsx', sheet_name='4') # 把数据分成输入和输出 X = data.iloc[:, 0:5].values y = data.iloc[:, 0:5].values # 对输入和输出数据进行归一化 scaler_X = MinMaxScaler(feature_range=(0, 6)) X = scaler_X.fit_transform(X) scaler_y = MinMaxScaler(feature_range=(0, 6)) y = scaler_y.fit_transform(y) # 将数据集分成训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=0) # 创建神经网络模型 model = Sequential() model.add(Dense(units=4, input_dim=4, activation='relu')) model.add(Dense(units=36, activation='relu')) model.add(Dense(units=4, activation='relu')) model.add(Dense(units=4, activation='linear')) # 编译模型 model.compile(loss='mean_squared_error', optimizer='sgd') # 训练模型 model.fit(X_train, y_train, epochs=100, batch_size=1257) # 评估模型 score = model.evaluate(X_test, y_test, batch_size=30) print('Test loss:', score) # 使用训练好的模型进行预测 X_test_scaled = scaler_X.transform(X_test) y_pred = model.predict(X_test_scaled) # 对预测结果进行反归一化 y_pred_int = scaler_y.inverse_transform(y_pred).round().astype(int) # 构建带有概率的预测结果 y_pred_prob = pd.DataFrame(y_pred_int, columns=data.columns[:4]) mse = ((y_test - y_pred) 2).mean(axis=None) y_pred_prob['Probability'] = 1 / (1 + mse - ((y_pred_int - y_test) 2).mean(axis=None)) # 过滤掉和值超过6或小于6的预测值 y_pred_filtered = y_pred_prob[(y_pred_prob.iloc[:, :4].sum(axis=1) == 6)] # 去除重复的行 y_pred_filtered = y_pred_filtered.drop_duplicates() # 重新计算低于1.2的 Probability 值 low_prob_indices = y_pred_filtered[y_pred_filtered['Probability'] < 1.5].index for i in low_prob_indices: y_pred_int_i = y_pred_int[i] y_test_i = y_test[i] mse_i = ((y_test_i - y_pred_int_i) 2).mean(axis=None) new_prob_i = 1 / (1 + mse_i - ((y_pred_int_i - y_test_i) 2).mean(axis=None)) y_pred_filtered.at[i, 'Probability'] = new_prob_i # 打印带有概率的预测结果 print('Predicted values with probabilities:') print(y_pred_filtered)这段代码有问题，你帮忙改一下

from sklearn.model_selection import train_test_split from keras.models import Sequential from keras.layers import Dense from keras.models import load_model model = load_model('model.h5') # 读取Excel...

import tensorflow as tf import numpy as np import matplotlib.pyplot as plt import pandas as pd from sklearn.utils import shuffle from sklearn.preprocessing import scale df = pd.read_csv("C:\\boston.csv",header=0) ds = df.values from sklearn.datasets import load_boston boston = load_boston() X = boston.data y = boston.target from sklearn.model_selection import train_test_split X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) from sklearn.preprocessing import StandardScaler scaler = StandardScaler() X_train = scaler.fit_transform(X_train) X_test = scaler.transform(X_test) from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Dense model = Sequential([ Dense(64, activation='relu', input_shape=(X_train.shape[1],)), Dense(64, activation='relu'), Dense(64, activation='relu'), Dense(1) ]) model.compile(loss='mean_squared_error', optimizer='adam') history = model.fit(X_train, y_train, validation_split=0.1, epochs=100, batch_size=32) from sklearn.metrics import mean_squared_error y_pred = model.predict(x_test)mse = mean_squared_error(y_test, y_pred)print('MSE:’, mse) import matplotlib.pyplot as plt plt.plot(history.history['accuracy'], label='train') plt.plot(history.history['val_accuracy'], label='validation') plt.legend() plt.show()

from sklearn.model_selection import train_test_split X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) 对训练集和测试集进行标准化处理： from sklearn....

import pandas as pd from sklearn.preprocessing import StandardScaler from sklearn.decomposition import PCA from sklearn.model_selection import train_test_split from keras.models import Sequential from keras.layers import Dense, Conv1D, MaxPooling1D, Flatten from sklearn.metrics import accuracy_score from sklearn.metrics import confusion_matrix, classification_report from sklearn.metrics import roc_auc_score from sklearn.utils.class_weight import compute_class_weight # 读取数据 data = pd.read_csv('database.csv') # 数据预处理 X = data.iloc[:, :-1].values y = data.iloc[:, -1].values scaler = StandardScaler() X = scaler.fit_transform(X) # 特征选择 pca = PCA(n_components=10) X = pca.fit_transform(X) # 划分训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) class_weights = compute_class_weight(class_weight='balanced', classes=np.unique(y_train), y=y_train) # 构建CNN模型 model = Sequential() model.add(Conv1D(filters=64, kernel_size=3, activation='relu', input_shape=(10, 1))) model.add(MaxPooling1D(pool_size=2)) model.add(Flatten()) model.add(Dense(10, activation='relu')) model.add(Dense(1, activation='sigmoid')) model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['accuracy']) # 训练模型 X_train = X_train.reshape((X_train.shape[0], X_train.shape[1], 1)) X_test = X_test.reshape((X_test.shape[0], X_test.shape[1], 1)) model.fit(X_train, y_train,class_weight=class_weights,epochs=100, batch_size=64, validation_data=(X_test, y_test)) # 预测结果 y_pred = model.predict(X_test) #检验值 accuracy = accuracy_score(y_test, y_pred) auc = roc_auc_score(y_test, y_pred) print(auc) print("Accuracy:", accuracy) print('Confusion Matrix:\n', confusion_matrix(y_test, y_pred)) print('Classification Report:\n', classification_report(y_test, y_pred))

这是一个使用卷积神经网络(CNN)进行二分类的模型，数据经过了标准化和PCA特征选择的预处理。模型使用了一个卷积层(Conv1D)和一个池化层(MaxPooling1D)，然后通过一个全连接层(Dense)输出最终结果。...

import tensorflow as tf import pickle import pandas as pd from sklearn.model_selection import train_test_split from sklearn.preprocessing import MinMaxScaler import matplotlib.pyplot as plt # 从Excel文件中读取数据 data = pd.read_excel('D:\python-learn\data.xlsx', engine='openpyxl') input_data = data.iloc[:, :12].values #获取Excel文件中第1列到第12列的数据 output_data = data.iloc[:, 12:].values #获取Excel文件中第13列到最后一列的数据 # 数据归一化处理 scaler_input = MinMaxScaler() scaler_output = MinMaxScaler() input_data = scaler_input.fit_transform(input_data) output_data = scaler_output.fit_transform(output_data) # 划分训练集和验证集 X_train, X_val, y_train, y_val = train_test_split(input_data, output_data, test_size=0.1, random_state=42) # 定义神经网络模型 model = tf.keras.Sequential([ tf.keras.layers.Input(shape=(12,)), tf.keras.layers.Dense(10, activation=tf.keras.layers.LeakyReLU(alpha=0.1)), tf.keras.layers.Dense(10, activation=tf.keras.layers.LeakyReLU(alpha=0.1)), tf.keras.layers.Dense(10, activation=tf.keras.layers.LeakyReLU(alpha=0.1)), tf.keras.layers.Dense(8, activation='linear') ]) # 编译模型 model.compile(optimizer=tf.keras.optimizers.Adam(learning_rate=0.001), loss='mse') # 定义学习率衰减 def scheduler(epoch, lr): if epoch % 50 == 0 and epoch != 0: return lr * 0.1 else: return lr callback = tf.keras.callbacks.LearningRateScheduler(scheduler) # 训练模型 history = model.fit(X_train, y_train, validation_data=(X_val, y_val), epochs=200, batch_size=50, callbacks=[callback])这个代码中训练的数据是怎么样读取如何进行训练的（详细说明）

然后使用 train_test_split 函数将数据分为训练集和验证集。定义神经网络模型使用了 Keras 库中的 Sequential 类，其中包含了 4 个 Dense 层，分别是 10 个节点、10 个节点、10 个节点和 8 个节点，激活函数分别为 ...

import pandas as pd from sklearn.preprocessing import MinMaxScaler from keras.models import Sequential from keras.layers import Dense, SimpleRNN from sklearn.metrics import mean_squared_error # 从Excel文件中读取数据 data = pd.read_excel('data.xlsx', sheet_name='Sheet1') # 数据归一化 scaler = MinMaxScaler(feature_range=(0, 1)) scaled_data = scaler.fit_transform(data) # 将数据划分为训练集和测试集 train_size = int(len(scaled_data) * 0.7) test_size = len(scaled_data) - train_size train_data, test_data = scaled_data[0:train_size, :], scaled_data[train_size:len(scaled_data), :] # 创建RNN模型 model = Sequential() model.add(SimpleRNN(units=64, input_shape=(1, 4), activation='relu')) model.add(Dense(units=1)) model.compile(loss='mean_squared_error', optimizer='adam') # 训练模型 model.fit(train_data[:, 0:3].reshape(-1, 1, 3), train_data[:, 3], epochs=100, batch_size=32) # 在测试集上进行预测 predicted = model.predict(test_data[:, 0:3].reshape(-1, 1, 3)) # 反归一化 predicted = scaler.inverse_transform(predicted) actual = scaler.inverse_transform(test_data[:, 3].reshape(-1, 1)) # 计算均方误差 mse = mean_squared_error(actual, predicted) print("均方误差：", mse)这个表格里的数据假有8列，向下传播最后一行是8个输出，这个里面的程序里面怎么改

model.add(SimpleRNN(units=64, input_shape=(1, 4), activation='relu')) 修改为： model.add(SimpleRNN(units=64, input_shape=(1, 3), activation='relu')) 这样模型的输入就是3个特征，而不是4个...

# -- coding: utf-8 -- """ @author: zhang'xin'ge """ # 导入必要的库和数据 import pandas as pd from sklearn.model_selection import train_test_split from sklearn.preprocessing import StandardScaler from keras.models import Sequential from keras.layers import LSTM, Dense data = pd.read_csv('D:/MATLAB/data_test/0713_电子版更新.csv') # 将数据集拆分为训练集和测试集，并进行特征缩放： X = data.drop(['体质类型'], axis=1).values y = data['体质类型'].values X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) scaler = StandardScaler() X_train_scaled = scaler.fit_transform(X_train) X_test_scaled = scaler.transform(X_test) #使用LSTM算法训练一个分类模型 model = Sequential() model.add(LSTM(64, input_shape=(X_train_scaled.shape[1], 1))) model.add(Dense(32, activation='relu')) model.add(Dense(9, activation='softmax')) model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy']) # 将训练集和测试集转换为LSTM模型需要的输入格式： X_train_lstm = X_train_scaled.reshape((X_train_scaled.shape[0], X_train_scaled.shape[1], 1)) X_test_lstm = X_test_scaled.reshape((X_test_scaled.shape[0], X_test_scaled.shape[1], 1)) # 使用训练集对模型进行训练： model.fit(X_train_lstm, y_train, epochs=50, batch_size=32, validation_data=(X_test_lstm, y_test)) # 使用训练好的模型对测试集进行预测，并计算准确率： y_pred = model.predict_classes(X_test_lstm) accuracy = (y_pred == y_test).mean() print('Accuracy:', accuracy)

3. 使用train_test_split函数将数据集分割为训练集和测试集，并使用StandardScaler进行特征缩放。 4. 创建一个Sequential模型，并添加一个LSTM层作为输入层。指定LSTM层的输出维度为64。 5. 在LSTM层后面添加一个...

import tensorflow as tf import pandas as pd from sklearn.model_selection import train_test_split from sklearn.preprocessing import MinMaxScaler import matplotlib.pyplot as plt # 从Excel文件中读取数据 data = pd.read_excel('E:\学习\python\data2.xlsx', engine='openpyxl') input_data = data.iloc[:, :12].values #获取Excel文件中第1列到第12列的数据 output_data = data.iloc[:, 12:].values #获取Excel文件中第13列到最后一列的数据 # 数据归一化处理 scaler_input = MinMaxScaler() scaler_output = MinMaxScaler() input_data = scaler_input.fit_transform(input_data) output_data = scaler_output.fit_transform(output_data) # 划分训练集和验证集 X_train, X_val, y_train, y_val = train_test_split(input_data, output_data, test_size=0.1, random_state=42) # 定义神经网络模型 model = tf.keras.Sequential([ tf.keras.layers.Input(shape=(12,)), tf.keras.layers.Dense(10, activation=tf.keras.layers.LeakyReLU(alpha=0.1)), tf.keras.layers.Dense(10, activation=tf.keras.layers.LeakyReLU(alpha=0.1)), tf.keras.layers.Dense(10, activation=tf.keras.layers.LeakyReLU(alpha=0.1)), tf.keras.layers.Dense(8, activation='linear') ]) # 编译模型 model.compile(optimizer=tf.keras.optimizers.Adam(learning_rate=0.001), loss='mse') # 定义学习率衰减 def scheduler(epoch, lr): if epoch % 50 == 0 and epoch != 0: return lr * 0.1 else: return lr callback = tf.keras.callbacks.LearningRateScheduler(scheduler) # 训练模型 history = model.fit(X_train, y_train, validation_data=(X_val, y_val), epochs=200, batch_size=50, callbacks=[callback]) # 导出损失函数曲线 plt.plot(history.history['loss'], label='Training Loss') plt.plot(history.history['val_loss'], label='Validation Loss') plt.xlabel('Epoch') plt.ylabel('Loss') plt.legend() plt.savefig('loss_curve.png')

首先，通过pandas库读取Excel文件的数据，并使用sklearn库的MinMaxScaler函数进行数据归一化处理。然后，使用train_test_split函数将数据集划分为训练集和验证集。接着，定义一个包含4个全连接层的神经网络模型，并...

#导入所需库 import numpy as np import pandas as pd from sklearn.preprocessing import LabelEncoder from keras.utils import to_categorical from keras.models import Sequential from keras.layers import Dense from sklearn.model_selection import KFold #读入数据 train_data = pd.read_csv('ProSeqs_Train.txt', delimiter=' ', header=None) test_data = pd.read_csv('ProSeqs_Test.txt', delimiter=' ', header=None) #预处理训练集数据 X = train_data.iloc[:, 2:].values y = train_data.iloc[:, 1].values le = LabelEncoder() y = le.fit_transform(y) y = to_categorical(y) #定义模型 model = Sequential() model.add(Dense(64, input_dim=X.shape[1], activation='relu')) model.add(Dense(32, activation='relu')) model.add(Dense(2, activation='softmax')) model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy']) #K折交叉验证训练模型 kf = KFold(n_splits=5, shuffle=True, random_state=42) fold_scores = [] for train_index, valid_index in kf.split(X): train_X, train_y = X[train_index], y[train_index] valid_X, valid_y = X[valid_index], y[valid_index] model.fit(train_X, train_y, validation_data=(valid_X, valid_y), epochs=50, batch_size=32, verbose=2) fold_scores.append(model.evaluate(valid_X, valid_y, verbose=0)[1]) print('KFold cross-validation accuracy: {:.2f}%'.format(np.mean(fold_scores) * 100)) #预处理测试集数据 test_X = test_data.iloc[:, 1:].values #预测测试集结果 preds = model.predict(test_X) preds = np.argmax(preds, axis=1) #保存预测结果至文件中 np.savetxt('preds.txt', preds, fmt='%d') #输出预测结果 print('Predictions:') print(preds)该蛋白质功能预测实验涉及分类模型的理论基础

这个蛋白质功能预测实验涉及分类模型的理论基础。具体来说，使用了深度学习中的神经网络模型，通过对蛋白质序列进行预处理和特征提取，将其表示为数值型的特征向量，然后将这些向量作为输入，训练出一个分类模型来对...

import numpy as np import pandas as pd from sklearn.model_selection import train_test_split from keras.models import Sequential from keras.layers import Dense from pyswarm import pso import matplotlib.pyplot as plt from sklearn.preprocessing import StandardScaler from sklearn.metrics import mean_absolute_error from sklearn.metrics import mean_squared_error from sklearn.metrics import r2_score file = "zhong.xlsx" data = pd.read_excel(file) #reading file X=np.array(data.loc[:,'种植密度':'有效积温']) y=np.array(data.loc[:,'产量']) y.shape=(185,1) # 将数据集分为训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X,y, test_size=0.25, random_state=10) SC=StandardScaler() X_train=SC.fit_transform(X_train) X_test=SC.fit_transform(X_test) y_train=SC.fit_transform(y_train) y_test=SC.fit_transform(y_test) print("X_train.shape:", X_train.shape) print("X_test.shape:", X_test.shape) print("y_train.shape:", y_train.shape) print("y_test.shape:", y_test.shape) # 定义BP神经网络模型 def nn_model(X): model = Sequential() model.add(Dense(8, input_dim=X_train.shape[1], activation='relu')) model.add(Dense(12, activation='relu')) model.add(Dense(1)) model.compile(loss='mean_squared_error', optimizer='adam') return model # 定义适应度函数 def fitness_func(X): model = nn_model(X) model.fit(X_train, y_train, epochs=60, verbose=2) score = model.evaluate(X_test, y_test, verbose=2) print(score) # 定义变量的下限和上限 lb = [5, 5] ub = [30, 30] # 利用PySwarm库实现改进的粒子群算法来优化BP神经网络预测模型 result = pso(fitness_func, lb, ub) # 输出最优解和函数值 print('最优解:', result[0]) print('最小函数值:', result[1]) mpl.rcParams["font.family"] = "SimHei" mpl.rcParams["axes.unicode_minus"] = False # 绘制预测值和真实值对比图 model = nn_model(X) model.fit(X_train, y_train, epochs=60, verbose=2) y_pred = model.predict(X_test) y_true = SC.inverse_transform(y_test) y_pred=SC.inverse_transform(y_pred) plt.figure() plt.plot(y_true,"bo-",label = '真实值') plt.plot(y_pred,"ro-", label = '预测值') plt.title('神经网络预测展示') plt.xlabel('序号') plt.ylabel('产量') plt.legend(loc='upper right') plt.show() print("R2 = ",r2_score(y_test, y_pred)) # R2 # 绘制损失函数曲线图 model = nn_model(X) history = model.fit(X_train, y_train, epochs=60, validation_data=(X_test, y_test), verbose=2) plt.plot(history.history['loss'], label='train') plt.plot(history.history['val_loss'], label='test') plt.legend() plt.show() mae = mean_absolute_error(y_test, y_pred) print('MAE: %.3f' % mae) mse = mean_squared_error(y_test, y_pred) print('mse: %.3f' % mse)

例如，应该将import numpy as np import pandas as pd分开成两行导入。其次，在进行数据标准化时，你应该使用同一个StandardScaler对象对训练集和测试集进行转换，而不是分别创建两个不同的对象进行转换。应该...

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

4. 构建BP神经网络模型：使用Keras库中的Sequential函数构建一个BP神经网络模型。该模型包含三个LSTM层和三个Dropout层，以及一个全连接层。其中，LSTM层用于提取序列数据中的时间依赖关系，Dropout层用于防止过拟合...

import pandas as pd import numpy as np import matplotlib.pyplot as plt import tensorflow as tf from tensorflow.keras.models import Sequential from tensorflow.keras.layers import LSTM, Dense data = pd.read_csv('车辆：274序：4结果数据.csv') x = data[['车头间距', '原车道前车速度']].values y = data['本车速度'].values train_size = int(len(x) * 0.7) test_size = len(x) - train_size x_train, x_test = x[0:train_size,:], x[train_size:len(x),:] y_train, y_test = y[0:train_size], y[train_size:len(y)] from sklearn.preprocessing import MinMaxScaler scaler = MinMaxScaler(feature_range=(0, 1)) x_train = scaler.fit_transform(x_train) x_test = scaler.transform(x_test) model = Sequential() model.add(LSTM(50, input_shape=(2, 1))) model.add(Dense(1)) model.compile(loss='mean_squared_error', optimizer='adam') history = model.fit(x_train.reshape(-1, 2, 1), y_train, epochs=100, batch_size=32, validation_data=(x_test.reshape(-1, 2, 1), y_test)) 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 right') plt.show() train_predict = model.predict(x_train.reshape(-1, 2, 1)) test_predict = model.predict(x_test.reshape(-1, 2, 1)) train_predict = scaler.inverse_transform(train_predict) train_predict = train_predict.reshape(-1) # 将结果变为一维数组 y_train = scaler.inverse_transform(y_train.reshape(-1, 1)).reshape(-1) # 将结果变为一维数组 test_predict = scaler.inverse_transform(test_predict) y_test = scaler.inverse_transform([y_test]) plt.plot(y_train[0], label='train') plt.plot(train_predict[:,0], label='train predict') plt.plot(y_test[0], label='test') plt.plot(test_predict[:,0], label='test predict') plt.legend() plt.show()报错Traceback (most recent call last): File "C:\Users\马斌\Desktop\NGSIM_data_processing\80s\lstmtest.py", line 42, in <module> train_predict = scaler.inverse_transform(train_predict) File "D:\python\python3.9.5\pythonProject\venv\lib\site-packages\sklearn\preprocessing\_data.py", line 541, in inverse_transform X -= self.min_ ValueError: non-broadcastable output operand with shape (611,1) doesn't match the broadcast shape (611,2)

from tensorflow.keras.models import Sequential from tensorflow.keras.layers import LSTM, Dense data = pd.read_csv('车辆：274序：4结果数据.csv') x = data[['车头间距', '原车道前车速度']].values y ...

import numpy as np import pandas as pd import tensorflow as tf from sklearn.preprocessing import LabelEncoder from sklearn.model_selection import train_test_split from sklearn.decomposition import PCA from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Conv1D, MaxPooling1D, Flatten, Dense, Dropout, Activation from sklearn.metrics import auc, accuracy_score, f1_score, recall_score # 读入数据 data = pd.read_csv('company_data.csv') X = data.iloc[:, :-1].values y = data.iloc[:, -1].values # 利用LabelEncoder将标签进行编码 encoder = LabelEncoder() y = encoder.fit_transform(y) # 划分训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) # 对特征进行PCA降维 pca = PCA(n_components=17) X_train = pca.fit_transform(X_train) X_test = pca.transform(X_test) # 对数据reshape为符合卷积层输入的格式 X_train = X_train.reshape(-1, 17, 1) X_test = X_test.reshape(-1, 17, 1) # 构建卷积神经网络模型 model = Sequential() model.add(Conv1D(filters=128, kernel_size=3, activation='relu', input_shape=(17, 1))) model.add(Conv1D(filters=128, kernel_size=4, activation='relu')) model.add(Conv1D(filters=128, kernel_size=5, activation='relu')) model.add(MaxPooling1D(pool_size=2)) model.add(Flatten()) model.add(Dense(units=64, activation='relu')) model.add(Dense(units=1, activation='sigmoid')) # 编译模型 model.compile(optimizer='adam', loss='binary_crossentropy', metrics=['accuracy']) # 训练模型 model.fit(X_train, y_train, batch_size=64, epochs=10, validation_data=(X_test, y_test), verbose=1) # 在测试集上评估模型 y_pred = model.predict(X_test) y_pred = np.round(y_pred).flatten() # 计算各项指标 auc_score = auc(y_test, y_pred) accuracy = accuracy_score(y_test, y_pred) f1score = f1_score(y_test, y_pred) recall = recall_score(y_test, y_pred) # 打印输出各项指标 print("AUC score:", auc_score) print("Accuracy:", accuracy) print("F1 score:", f1score) print("Recall:", recall) 这个代码有什么错误

1, 2, 3, 4, 5, 8, 7, 6, 9] [0, 1, 2, 3, 4, 5, 8, 7, 9, 6] [这段代码没有明显的语法错误，但是有一些潜在的问题： 1. 没有对数据进行标0, 1, 2, 3, 4, 5, 8, 9, 6, 7] 准化处理，可能会影响模型的性能。...

Python库 | sklearn_cv_pandas-0.0.4.tar.gz

资源分类：Python库所属语言：Python 资源全名：sklearn_cv_pandas-0.0.4.tar.gz 资源来源：官方安装方法：https://lanzao.blog.csdn.net/article/details/101784059

import pandas as pd import numpy as np import tushare as ts from sklearn.preprocessing import MinMaxScaler import matplotlib.pyplot as plt import mplfinance as mpf from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Dense, LSTM

相关推荐

import pandas as pd import numpy as np import tushare as ts from sklearn.preprocessing import MinMaxScaler import matplotlib.pyplot as plt import mplfinance as mpf from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Dense, LSTM

相关推荐

pd_split_train_test.rar_pandas_pandas对数据分类_pd.split_split_数据分类

import pandas as pd.docx

详解pandas库pd.read_excel操作读取excel文件参数整理与实例

Python库 | sklearn_cv_pandas-0.0.4.tar.gz

最新推荐

30天学会医学统计学你准备好了吗

213ssm_mysql_jsp 图书仓储管理系统_ruoyi.zip（可运行源码+sql文件+文档）

城市二次供水智慧化运行管理经验分享

京瓷TASKalfa系列维修手册：安全与操作指南

管理建模和仿真的文件

【进阶】入侵检测系统简介

轨道障碍物智能识别系统开发

小波变换在视频压缩中的应用

"互动学习：行动中的多样性与论文攻读经历"

【进阶】Python高级加密库cryptography