import numpy as np import pandas as pd train_data = pd.read_csv("C://Users//Dell//Desktop//数据分析作业//adult_train(1).csv") test_data = pd.read_csv("C://Users//Dell//Desktop//数据分析作业//adult_test.csv") #写入csv文件 columns = ['Age','Workclass','fnlgwt','Education','EdNum','MaritalStatus', 'Occupation','Relationship','Race','Sex','CapitalGain', 'CapitalLoss','HoursPerWeek','Country','Income'] #写入名称 df_train_set = pd.read_csv('C://Users//Dell//Desktop//数据分析作业//adult_train(1).csv', names=columns) #跳过表头 df_test_set = pd.read_csv('C://Users//Dell//Desktop//数据分析作业//adult_test.csv', names=columns, skiprows=1) #删除ID序列号栏 df_train_set.drop('fnlgwt', axis=1, inplace=True) df_test_set.drop('fnlgwt', axis=1, inplace=True) #用unknown替换？ for i in df_train_set.columns: df_train_set[i].replace('?', 'Unknown', inplace=True) df_test_set[i].replace('?', 'Unknown', inplace=True) #去掉非int64类型数据中的点和空格 for col in df_train_set.columns: if df_train_set[col].dtype != 'int64': df_train_set[col] = df_train_set[col].apply(lambda val: val.replace(" ", "")) df_train_set[col] = df_train_set[col].apply(lambda val: val.replace(".", "")) df_test_set[col] = df_test_set[col].apply(lambda val: val.replace(" ", "")) df_test_set[col] = df_test_set[col].apply(lambda val: val.replace(".", "")) # 将训练集导出为 csv 文件 df_train_set.to_csv('train_set.csv', index=False) # 将测试集导出为 csv 文件 df_test_set.to_csv('test_set.csv', index=False)

Python脚本导出全国行政区划数据（json/csv/excel格式）

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修改一下这段代码在pycharm中的实现，import pandas as pd import numpy as np from sklearn.model_selection import train_test_split import torch import torch.nn as nn import torch.nn.functional as F import torch.optim as optim #from torchvision import datasets,transforms import torch.utils.data as data #from torch .nn:utils import weight_norm import matplotlib.pyplot as plt from sklearn.metrics import precision_score from sklearn.metrics import recall_score from sklearn.metrics import f1_score from sklearn.metrics import cohen_kappa_score data_ = pd.read_csv(open(r"C:\Users\zhangjinyue\Desktop\rice.csv"),header=None) data_ = np.array(data_).astype('float64') train_data =data_[:,:520] train_Data =np.array(train_data).astype('float64') train_labels=data_[:,520] train_labels=np.array(train_data).astype('float64') train_data,train_data,train_labels,train_labels=train_test_split(train_data,train_labels,test_size=0.33333) train_data=torch.Tensor(train_data) train_data=torch.LongTensor(train_labels) train_data=train_data.reshape(-1,1,20,26) train_data=torch.Tensor(train_data) train_data=torch.LongTensor(train_labels) train_data=train_data.reshape(-1,1,20,26) start_epoch=1 num_epoch=1 BATCH_SIZE=70 Ir=0.001 classes=('0','1','2','3','4','5') device=torch.device("cuda"if torch.cuda.is_available()else"cpu") torch.backends.cudnn.benchmark=True best_acc=0.0 train_dataset=data.TensorDataset(train_data,train_labels) test_dataset=data.TensorDataset(train_data,train_labels) train_loader=torch.utills.data.DataLoader(dtaset=train_dataset,batch_size=BATCH_SIZE,shuffle=True) test_loader=torch.utills.data.DataLoader(dtaset=train_dataset,batch_size=BATCH_SIZE,shuffle=True)

data_ = pd.read_csv(r"C:\Users\zhangjinyue\Desktop\rice.csv", header=None) data_ = np.array(data_).astype('float64') train_data = data_[:, :520] train_labels = data_[:, 520] train_data, _, train_...

X_train = pd.read_csv("C:/Users/hp/Desktop/X_trainA.csv") y_train = pd.read_csv("C:/Users/hp/Desktop/y_trainA.csv") y_train = y_train.values.ravel() X_test = pd.read_csv("C:/Users/hp/Desktop/X_testA.csv") y_test = pd.read_csv("C:/Users/hp/Desktop/y_testA.csv") y_test = y_test.values.ravel() rf = RandomForestClassifier(max_depth=None, min_samples_leaf=4, min_samples_split=10, n_estimators=10, random_state=42) rf.fit(X_train, y_train) # 计算Shap值 explainer = shap.KernelExplainer(rf) shap_values = explainer.shap_values(X_train) # 可视化特征重要性 shap.summary_plot(shap_values, X_train, plot_type="bar") print(X_train, y_train) print(shap_values) import numpy as np shap_values = np.array(shap_values) shap_values= shap_values.reshape((2*105, 16)) df = pd.DataFrame(shap_values) df.to_excel('shap3.xlsx', index=False)有什么问题

import numpy as np shap_values = np.array(shap_values) 改为： python shap_values = np.asarray(shap_values) 3. 在将shap_values写入Excel文件之前，需要将其reshape成正确的形状，但是代码中...

import pandas as pd data = pd.read_csv('gdpcost.csv') import numpy as np from sklearn.model_selection import train_test_split # 将数据拆分成训练集和测试集 train_data, test_data, train_labels, test_labels = train_test_split(data['GDP'].values, data['Cost'].values, test_size=0.2) # 将数据转换为 NumPy 数组并进行标准化处理 train_data = (train_data - np.mean(train_data)) / np.std(train_data) test_data = (test_data - np.mean(train_data)) / np.std(train_data) train_labels =(train_labels - np.mean(train_labels)) / np.std(train_labels) test_labels= (test_labels - np.mean(train_labels)) / np.std(train_labels) # 将数据转换为 NumPy 数组并进行重塑 train_data = train_data.reshape(-1, 1) test_data = test_data.reshape(-1, 1) train_labels = train_labels.reshape(-1, 1) test_labels = test_labels.reshape(-1, 1) from keras.models import Sequential from keras.layers import Dense # 定义模型 model = Sequential() model.add(Dense(10, activation='relu', input_shape=(1,))) model.add(Dense(1)) # 编译模型 model.compile(optimizer='adam', loss='mse') # 训练模型 model.fit(train_data, train_labels, epochs=100, batch_size=32) # 评估模型 loss = model.evaluate(test_data, test_labels) print('Test loss:', loss)请解释每行代码

2. data = pd.read_csv('gdpcost.csv')：从 CSV 文件中读取数据并将其存储在名为 data 的 pandas DataFrame 中。 3. import numpy as np：导入 numpy 库并给它取别名 np。 4. from sklearn.model_selection ...

import numpy as np import sklearn import pandas as pd data = pd.read_csv('C:/Users/86159/Desktop/TaxDetection_NoLable.csv') data.head(11) X=data.loc[:,:] y=data.loc[:,] from sklearn.model_selection import train_test_split X_train, X_test, y_train, y_test = train_test_split(X, y, random_state=0) from sklearn.neighbors import KNeighborsClassifier clf = KNeighborsClassifier(n_neighbors=3) clf.fit(X_train, y_train.astype('int')) print("Test set predictions: {}".format(clf.predict(X_test))) print("Training set score:{:.2f}".format(clf.score(X_train,y_train))) print("Test set accuracy: {:.2f}".format(clf.score(X_test, y_test)))

这段代码中有一个问题，即y的赋值语句中没有指定具体的列名或索引，因此会导致后面的代码无法正确地运行。你需要指定y的列名或索引...y = data.loc[:, "label"] 这样就可以将"label"列的数据提取出来作为y数据了。

from sklearn import svm import pandas as pd import numpy as np from sklearn.model_selection import train_test_split data = pd.read_csv( 'final_data1.csv') Y = data.y X = data.drop('y', axis=1) X_train, X_test, y_train, y_test = train_test_split(X_norm, Y, test_size=0.2, random_state=42) clf = svm.SVC() clf.fit(X_train, y_train) y_pred = clf.predict(X_test) y_pred= np.round(y_pred) 对上述代码进行GridSearchCV网格搜索调参的代码

data = pd.read_csv('final_data1.csv') Y = data.y X = data.drop('y', axis=1) X_train, X_test, y_train, y_test = train_test_split(X, Y, test_size=0.2, random_state=42) # 定义参数网格 param_grid = {'C':...

import sklearn.model_selection as ms datas=pd.read_csv(r'C:/Users/20397/Desktop/人工智能实训材料/Day3 分类/wisc_bc_data.csv',sep=',') x=datas.iloc[:,2:32] y=datas.iloc[:,1:2] x_train,x_test,y_train,y_test=ms.train_test_split(x,y,test_size=0.2,random_state=42) y_train=y_train.values.ravel() y_test=y_test.values.ravel() #构建和训练模型 import numpy as np import matplotlib.pyplot as plt from sklearn.neighbors import KNeighborsClassifier import pandas as pd # 构建 knn 模型 knn= KNeighborsClassifier(n_neighbors=43,weights='distance',p=2) #训练KNN模型 knn.fit(x_train,y_train) knn.score(x_train,y_train) # 评估模型效果 from sklearn.metrics import classification_report y_pred=knn.predict(x_test) print(classification_report(y_test,y_pred))

首先，使用 pandas 读取 csv 文件中的数据，并对数据进行切分，将前 30 列作为特征 x，第 2 列作为标签 y。然后使用 sklearn 中的 train_test_split 函数将数据切分为训练集和测试集，其中测试集占比为 20%。接着，...

import pandas as pd from keras.models import Sequential from keras.layers import Dense import numpy as np from sklearn.metrics import accuracy_score file = pd.read_excel('/Users/zxh-mac/desktop/Edu-Data（A题数据）.xlsx') # 第二阶段：转化定性变量为定量变量使用onehot函数同时读取新的excel x = pd.get_dummies(file, dtype=int) x.to_excel('/Users/zxh-mac/desktop/Edu-Data(onehot_version).xlsx') data = pd.read_excel('/Users/zxh-mac/desktop/Edu-Data(onehot_version).xlsx') # 第三阶段：实现bp神经网络 train_data = data[:320] test_data = data[320:] train_features = train_data.drop('Class', axis=1).values train_labels = train_data['Class'].values test_features = test_data.drop('Class', axis=1).values test_labels = test_data['Class'].values model = Sequential() model.add(Dense(units=72, activation='relu', input_dim=train_features.shape[1])) model.add(Dense(units=72, activation='relu')) model.add(Dense(units=3, activation='sigmoid')) model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['accuracy']) model.fit(train_features, train_labels, epochs=10, batch_size=32, validation_data=(test_features, test_labels), verbose=1) predictions = model.predict(test_features) print(predictions)就是这段无法确定问题是什么

import numpy as np from keras.models import Sequential from keras.layers import Dense from sklearn.metrics import accuracy_score # 读取文件 file = pd.read_excel('/Users/zxh-mac/desktop/Edu-Data（A题...

import pandas as pd import numpy as np import matplotlib.pyplot as plt def draw_plot(list): plt.plot(list['director_name'],list['movie_facebook_likes']) plt.show() if name == "main": data = pd.read_csv('../data/movie.csv') data['director_name'].describe() plt.rcParams["font.sans-serif"] = ["SimHei"] plt.rcParams["axes.unicode_minus"] = False draw_plot(data) print(data)

- pd.read_csv()：读取 CSV 文件内容为 Pandas 数据帧。 - data['director_name'].describe()：输出导演名字的统计信息。 - plt.rcParams["font.sans-serif"] = ["SimHei"]：设置字体为中文。 - plt.rcParams...

优化以下代码使其提取csv文件中有小数点的行import numpy as np import pandas as pd data = pd.read_csv(r'C:\Users\Admin\Desktop\bisaifiles\population.csv',header=None) data decimal_data = df[df.dtypes == float] print(decimal_data.index.tolist())

data = pd.read_csv(r'C:\Users\Admin\Desktop\bisaifiles\population.csv', header=None) # 将数据类型转换为float data = data.apply(pd.to_numeric, errors='coerce') # 提取有小数点的行 decimal_data = data...

# 加载数据集 train_data = pd.read_csv('mnist_dataset/mnist_train.csv') test_data = pd.read_csv('mnist_dataset/mnist_test.csv') # 提取特征和标签 train_features, train_labels = train_data.iloc[:, 1:], train_data.iloc[:, 0] test_features, test_labels = test_data.iloc[:, 1:], test_data.iloc[:, 0]这是一段mnist数据集的读取，请帮我实现mnist数据集的可视化代码

train_data = pd.read_csv('mnist_dataset/mnist_train.csv') test_data = pd.read_csv('mnist_dataset/mnist_test.csv') # 提取特征和标签 train_features, train_labels = train_data.iloc[:, 1:], train_data....

加载数据集 train_data = pd.read_csv('mnist_dataset/mnist_train.csv') test_data = pd.read_csv('mnist_dataset/mnist_test.csv') # 提取特征和标签 train_features, train_labels = train_data.iloc[:, 1:], train_data.iloc[:, 0] test_features, test_labels = test_data.iloc[:, 1:], test_data.iloc[:, 0]这是一段mnist数据集的读取，请帮我实现mnist数据集的可视化前100张图片代码

train_data = pd.read_csv('mnist_dataset/mnist_train.csv') test_data = pd.read_csv('mnist_dataset/mnist_test.csv') # 提取特征和标签 train_features, train_labels = train_data.iloc[:, 1:], train_data....

import numpy as np import pandas as pd # 标签编码 from sklearn.preprocessing import LabelEncoder # 随机森林回归模型 from sklearn.ensemble import RandomForestRegressor # 交叉验证 from sklearn.model_selection import cross_val_score data = pd.read_excel('./data/汽车数据集/car.xlsx') le = LabelEncoder() for i in data.columns: data[i] = le.fit_transform(data[i]) from sklearn.model_selection import train_test_split train_x, test_x, train_y, test_y = train_test_split(data.iloc[:, :-1], data.iloc[:, -1], random_state=7) model = RandomForestRegressor(max_depth=6, n_estimators=200, random_state=7) model.fit(train_x, train_y) cvs = cross_val_score(model, train_x, train_y, cv=5, scoring='f1_weighted') print('f1得分: ', cvs.mean())

首先，使用pandas读取了Excel格式的汽车数据集，并使用LabelEncoder对所有特征进行了标签编码。然后，使用train_test_split将数据集分成了训练集和测试集。接着，使用随机森林回归模型对训练集进行了训练，并使用...

import pandas as pd from sklearn.model_selection import train_test_split, GridSearchCV from sklearn.tree import DecisionTreeClassifier from sklearn.metrics import accuracy_score import numpy as np data = pd.read_csv('iris.csv', header=None, names=['sepald

1. 使用pandas库中的read_csv函数读取iris数据集，将第一行作为列名，并将数据存储到data变量中。 2. 将data中的特征值和类别标签分别存储到X和y变量中。 3. 使用train_test_split函数将数据集划分为训练集和测试...

解释这段代码import pandas as pd import numpy as np data = pd.read_csv(r'D:\桌面\train.csv') data

- data = pd.read_csv(r'D:\桌面\train.csv')：使用 Pandas 库的 read_csv() 函数读取名为 "train.csv" 的 CSV 文件，并将其存储在名为 "data" 的 Pandas DataFrame 中。r'D:\桌面\train.csv' 是文件的绝对路径，...

import pandas as pd import numpy as np import matplotlib.pyplot as plt import sklearn.model_selection as sM_S import sklearn.preprocessing as sP import sklearn.tree as sT import sklearn.metrics as sM import sklearn.naive_bayes as sNB #1读取数据 data_train = pd.read_excel("train data.xlsx") # 1.1剔除无关列 data = data_train.iloc[:,3:-1] #2预处理 data = data.dropna() #3.数据预处理：空值处理，值映射（分段），归一化/标准化 X = data.iloc[:,0:-1] y = data.iloc[:,-1] mms = sP.MinMaxScaler() X = mms.fit_transform(X) #4.分割数据集和测试集 x_train,x_text,y_train,y_text = sM_S.train_test_split(X,y,test_size=0.33,random_state=42) #5.选择模型 model = sT.DecisionTreeClassifier(max_depth=7) #6.训练模型 model.fit(x_train,y_train) #7.评价模型，赛事要求用F1 y_predict = model.predict(x_text) score = sM.f1_score(y_predict,y_text,average="macro") print("预处理：{} 模型：{} 参数：{} 得分：{}".format("均值填充处理_归一化","决策树","max_depth=7",score)) # 8.应用模型--预测 trainData = pd.read_excel("train data.xlsx") trainData = pd.DataFrame(trainData) trainData = trainData.iloc[:, 3:-2] trainData = trainData.dropna() # 删除空值行 val_data = trainData val_data = mms.fit_transform(val_data) print("预测 train data.xlsx 的结果为：", model.predict(val_data)) 以上这段代码能运行吗？

import numpy as np import matplotlib.pyplot as plt import sklearn.model_selection as sM_S import sklearn.preprocessing as sP import sklearn.tree as sT import sklearn.metrics as sM import sklearn.naive...

import sys import pandas as pd import numpy as np from google.colab import drive !gdown --id '1wNKAxQ29G15kgpBy_asjTcZRRgmsCZRm' --output data.zip !unzip data.zip # data = pd.read_csv('gdrive/My Drive/hw1-regression/train.csv', header = None, encoding = 'big5') data = pd.read_csv('./train.csv', encoding = 'big5')

- data = pd.read_csv('./train.csv', encoding = 'big5'): 该行代码使用pandas的read_csv()函数读取名为train.csv的文件，并将数据保存到名为data的DataFrame对象中。encoding = 'big5'参数指定了文件的编码...

import numpy as np import pandas as pd file_one = pd.read_excel(r"C:\Users\86159\Desktop\0113013127hs.xls",skiprows=1) file_one

= file_one.dropna(how='all') # Remove rows with all missing values file_one = file_one.dropna(thresh=2) # Remove rows with less than 2 non-missing...one.head() # Show the first few rows of the data frame

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解释这段代码import pandas as pd import numpy as np data = pd.read_csv(r'D:\桌面\train.csv') data

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