train_X, test_X, train_y, test_y = train_test_split(content_list, label_list)

数据集分割train和test程序

python中导入 train_test_split提示错误的解决

在Python的机器学习实践中，train_test_split 是一个常用的功能，它来自 scikit-learn 库，用于将数据集分割成训练集和测试集。然而，有些用户在尝试导入 train_test_split 时可能会遇到错误，特别是在更新到...

create_balanced_train_test.zip_The Divide

标题"create_balanced_train_test.zip_The Divide"暗示了这个压缩包包含一个用于实现这一目标的脚本，而描述"Divide/Create data into training and testing data which are balanced basing on the labels."进一步...

def cv_model(clf, train_x, train_y, test_x, clf_name='lgb'): folds = 5 seed = 2021 kf = KFold(n_splits=folds, shuffle=True, random_state=seed) train = np.zeros(train_x.shape[0]) test = np.zeros(test_x.shape[0]) cv_scores = [] for i, (train_index, valid_index) in enumerate(kf.split(train_x, train_y)): print('** {} *'.format(str(i+1))) trn_x, trn_y, val_x, val_y = train_x.iloc[train_index], train_y[train_index], train_x.iloc[valid_index], train_y[valid_index] train_matrix = clf.Dataset(trn_x, label=trn_y) valid_matrix = clf.Dataset(val_x, label=val_y) params = { 'boosting_type': 'gbdt', 'objective': 'binary', 'metric': 'auc', 'min_child_weight': 5, 'num_leaves': 26, 'lambda_l2': 10, 'feature_fraction': 0.9, 'bagging_fraction': 0.9, 'bagging_freq': 4, 'learning_rate': 0.01, 'seed': 2021, 'nthread': 28, 'n_jobs':-1, 'silent': True, 'verbose': -1, } model = clf.train(params, train_matrix, 50000, valid_sets=[train_matrix, valid_matrix], #categorical_feature = categorical_feature, verbose_eval=500,early_stopping_rounds=200) val_pred = model.predict(val_x, num_iteration=model.best_iteration) test_pred = model.predict(test_x, num_iteration=model.best_iteration) train[valid_index] = val_pred test += test_pred / kf.n_splits cv_scores.append(roc_auc_score(val_y, val_pred)) print(cv_scores) print("%s_scotrainre_list:" % clf_name, cv_scores) print("%s_score_mean:" % clf_name, np.mean(cv_scores)) print("%s_score_std:" % clf_name, np.std(cv_scores)) return train, test lgb_train, lgb_test = cv_model(lgb, x_train, y_train, x_test)这段代码什么意思，分类标签为0和1，属于二分类，预测结果点击率的数值是怎么来的

- train_x 和 train_y 分别表示训练集的特征和标签。 - test_x 表示测试集的特征。 - clf_name 表示分类器的名称，用于输出结果时的标识。具体流程如下： 1. 将训练集分成五份，每份作为一次验证集，其余...

解释以下代码:def cv_model(clf, train_x, train_y, test_x, clf_name): folds = 5 seed = 2021 kf = KFold(n_splits=folds, shuffle=True, random_state=seed) test = np.zeros((test_x.shape[0],4)) cv_scores = [] onehot_encoder = OneHotEncoder(sparse=False) for i, (train_index, valid_index) in enumerate(kf.split(train_x, train_y)): print('** {} '.format(str(i+1))) trn_x, trn_y, val_x, val_y = train_x.iloc[train_index], train_y[train_index], train_x.iloc[valid_index], train_y[valid_index] if clf_name == "lgb": train_matrix = clf.Dataset(trn_x, label=trn_y) valid_matrix = clf.Dataset(val_x, label=val_y) params = { 'boosting_type': 'gbdt', 'objective': 'multiclass', 'num_class': 4, 'num_leaves': 2 5, 'feature_fraction': 0.8, 'bagging_fraction': 0.8, 'bagging_freq': 4, 'learning_rate': 0.1, 'seed': seed, 'nthread': 28, 'n_jobs':24, 'verbose': -1, } model = clf.train(params, train_set=train_matrix, valid_sets=valid_matrix, num_boost_round=2000, verbose_eval=100, early_stopping_rounds=200) val_pred = model.predict(val_x, num_iteration=model.best_iteration) test_pred = model.predict(test_x, num_iteration=model.best_iteration) val_y=np.array(val_y).reshape(-1, 1) val_y = onehot_encoder.fit_transform(val_y) print('预测的概率矩阵为：') print(test_pred) test += test_pred score=abs_sum(val_y, val_pred) cv_scores.append(score) print(cv_scores) print("%s_scotrainre_list:" % clf_name, cv_scores) print("%s_score_mean:" % clf_name, np.mean(cv_scores)) print("%s_score_std:" % clf_name, np.std(cv_scores)) test=test/kf.n_splits return test

函数的输入包括分类器clf，训练数据train_x和train_y，测试数据test_x，以及分类器名称clf_name。函数的输出为测试数据的预测结果。具体的实现步骤如下： 1. 将训练数据分为5折，设置随机种子为2021。 2...

import os import pickle import cv2 import matplotlib.pyplot as plt import numpy as np from keras.layers import Conv2D, MaxPooling2D, Flatten, Dense, Dropout from keras.models import Sequential from keras.optimizers import adam_v2 from keras_preprocessing.image import ImageDataGenerator from sklearn.model_selection import train_test_split from sklearn.preprocessing import LabelEncoder, OneHotEncoder, LabelBinarizer def load_data(filename=r'/root/autodl-tmp/RML2016.10b.dat'): with open(r'/root/autodl-tmp/RML2016.10b.dat', 'rb') as p_f: Xd = pickle.load(p_f, encoding="latin-1") # 提取频谱图数据和标签 spectrograms = [] labels = [] train_idx = [] val_idx = [] test_idx = [] np.random.seed(2016) a = 0 for (mod, snr) in Xd: X_mod_snr = Xd[(mod, snr)] for i in range(X_mod_snr.shape[0]): data = X_mod_snr[i, 0] frequency_spectrum = np.fft.fft(data) power_spectrum = np.abs(frequency_spectrum) ** 2 spectrograms.append(power_spectrum) labels.append(mod) train_idx += list(np.random.choice(range(a * 6000, (a + 1) * 6000), size=3600, replace=False)) val_idx += list(np.random.choice(list(set(range(a * 6000, (a + 1) * 6000)) - set(train_idx)), size=1200, replace=False)) a += 1 # 数据预处理 # 1. 将频谱图的数值范围调整到0到1之间 spectrograms_normalized = spectrograms / np.max(spectrograms) # 2. 对标签进行独热编码 label_binarizer = LabelBinarizer() labels_encoded= label_binarizer.fit_transform(labels) # transfor the label form to one-hot # 3. 划分训练集、验证集和测试集 # X_train, X_temp, y_train, y_temp = train_test_split(spectrograms_normalized, labels_encoded, test_size=0.15, random_state=42) # X_val, X_test, y_val, y_test = train_test_split(X_temp, y_temp, test_size=0.5, random_state=42) spectrogramss = np.array(spectrograms_normalized) print(spectrogramss.shape) labels = np.array(labels) X = np.vstack(spectrogramss) n_examples = X.shape[0] test_idx = list(set(range(0, n_examples)) - set(train_idx) - set(val_idx)) np.random.shuffle(train_idx) np.random.shuffle(val_idx) np.random.shuffle(test_idx) X_train = X[train_idx] X_val = X[val_idx] X_test = X[test_idx] print(X_train.shape) print(X_val.shape) print(X_test.shape) y_train = labels[train_idx] y_val = labels[val_idx] y_test = labels[test_idx] print(y_train.shape) print(y_val.shape) print(y_test.shape) # X_train = np.expand_dims(X_train,axis=-1) # X_test = np.expand_dims(X_test,axis=-1) # print(X_train.shape) return (mod, snr), (X_train, y_train), (X_val, y_val), (X_test, y_test) 这是我的数据预处理代码

你的数据预处理代码看起来很完整。它首先加载pickle文件，然后提取频谱图数据和标签。接下来，它对频谱图数据进行归一化处理，并对标签进行独热编码。最后，它将数据集划分为训练集、验证集和测试集，并返回这些数据...

import os import cv2 import numpy as np def load_data(file_dir): all_num = 4000 train_num = int(all_num * 0.75) cats = [] label_cats = [] dogs = [] label_dogs = [] for file in os.listdir(file_dir): file="\\"+file name = file.split(sep='.') if 'cat' in name[0]: cats.append(file_dir + file) label_cats.append(0) else: if 'dog' in name[0]: dogs.append(file_dir + file) label_dogs.append(1) image_list = np.hstack((cats,dogs)) label_list = np.hstack((label_cats, label_dogs)) temp = np.array([image_list, label_list]) # 矩阵转置 temp = temp.transpose() # 打乱顺序 np.random.shuffle(temp) # print(temp) # 取出第一个元素作为 image 第二个元素作为 label image_list = temp[:, 0] label1_train = temp[:train_num, 1] # print(label1_train) # 单出，去掉单字符 label_train = [int(y) for y in label1_train] # print(label_train) label1_test = temp[train_num:, 1] label_test = [int(y) for y in label1_test] data_test=[] data_train = [] for i in range (all_num): if i <train_num: image= image_list[i] image = cv2.imread(image) image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) #将图片转换成RGB格式 image = cv2.resize(image, (28, 28)) image = image.astype('float32') image = np.array(image)/255#归一化[0,1] image=image.reshape(-1,28,28) data_train.append(image) # label_train.append(label_list[i]) else: image = image_list[i] image = cv2.imread(image) image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) image = cv2.resize(image, (28, 28)) image = image.astype('float32') image = np.array(image) / 255 image = image.reshape(-1, 28, 28) data_test.append(image) # label_test.append(label_list[i]) data_train=np.array(data_train) label_train = np.array(label_train) data_test = np.array(data_test) label_test = np.array(label_test) return data_train,label_train,data_test, label_test

接着，将temp的第一列（即图片路径）赋值给image_list，将temp的前train_num行的第二列（即标签）赋值给label1_train，将temp的后面部分的第二列（即标签）赋值给label1_test。然后，将label1_train和label1_test从...

# 封装函数来进行knn试探性运算 def knn_score(k,X,y): # 构造算法对象 knn = KNeighborsClassifier(n_neighbors = k) scores = [] train_scores = [] for i in range(100): # 拆分 X_train,X_test,y_train,y_test = train_test_split(X,y,test_size=0.2,random_state=1) # 训练 knn.fit(X_train,y_train) # 评价模型 scores.append(knn.score(X_test,y_test)) # 经验评分 train_scores.append(knn.score(X_train,y_train)) return np.array(scores).mean(),np.array(train_scores).mean() # 调参 result_dict = {} k_list = [1,3,5,7,9,11] for k in k_list: score,train_score = knn_score(k,X,y) result_dict[k] = [score,train_score]利用这段代码调用tkinter库实现界面

X_train,X_test,y_train,y_test = train_test_split(X,y,test_size=0.2,random_state=1) # 训练 knn.fit(X_train,y_train) # 评价模型 scores.append(knn.score(X_test,y_test)) # 经验评分 train_scores....

帮我为下面的代码加上注释：class SimpleDeepForest: def init(self, n_layers): self.n_layers = n_layers self.forest_layers = [] def fit(self, X, y): X_train = X for _ in range(self.n_layers): clf = RandomForestClassifier() clf.fit(X_train, y) self.forest_layers.append(clf) X_train = np.concatenate((X_train, clf.predict_proba(X_train)), axis=1) return self def predict(self, X): X_test = X for i in range(self.n_layers): X_test = np.concatenate((X_test, self.forest_layers[i].predict_proba(X_test)), axis=1) return self.forest_layers[-1].predict(X_test[:, :-2]) # 1. 提取序列特征（如：GC-content、序列长度等） def extract_features(fasta_file): features = [] for record in SeqIO.parse(fasta_file, "fasta"): seq = record.seq gc_content = (seq.count("G") + seq.count("C")) / len(seq) seq_len = len(seq) features.append([gc_content, seq_len]) return np.array(features) # 2. 读取相互作用数据并创建数据集 def create_dataset(rna_features, protein_features, label_file): labels = pd.read_csv(label_file, index_col=0) X = [] y = [] for i in range(labels.shape[0]): for j in range(labels.shape[1]): X.append(np.concatenate([rna_features[i], protein_features[j]])) y.append(labels.iloc[i, j]) return np.array(X), np.array(y) # 3. 调用SimpleDeepForest分类器 def optimize_deepforest(X, y): X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2) model = SimpleDeepForest(n_layers=3) model.fit(X_train, y_train) y_pred = model.predict(X_test) print(classification_report(y_test, y_pred)) # 4. 主函数 def main(): rna_fasta = "RNA.fasta" protein_fasta = "pro.fasta" label_file = "label.csv" rna_features = extract_features(rna_fasta) protein_features = extract_features(protein_fasta) X, y = create_dataset(rna_features, protein_features, label_file) optimize_deepforest(X, y) if name == "main": main()

X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2) # Create an instance of the SimpleDeepForest classifier with 3 layers model = SimpleDeepForest(n_layers=3) # Fit the ...

import tkinter as tk from sklearn.neighbors import KNeighborsClassifier from sklearn.model_selection import train_test_split import numpy as np import pandas as pd global button1 seeds=pd.read_csv("seed2.csv",sep='\t',header=None) X = seeds.iloc[:,:7].copy() y=seeds.iloc[:,-1].copy() X_train,X_test,y_train,y_test=train_test_split(X,y,test_size=test,random_state=random) def knn_score(k,X,y):# 构造算法对象 knn = KNeighborsClassifier(n_neighbors = k) scores = [] train_scores = [] random=NIrandom_state.get() global test_size for i in range(100): # 拆分 if random_state!="": X_train,X_test,y_train,y_test=train_test_split(X,y,test_size=test,random_state=random) else: X_train,X_test,y_train,y_test=train_test_split(X,y,test_size=test) # 训练 knn.fit(X_train,y_train) # 评价模型 scores.append(knn.score(X_test,y_test)) # 经验评分 train_scores.append(knn.score(X_train,y_train)) return np.array(scores).mean(),np.array(train_scores).mean() def root4(): root4=tk.Toplevel()#建立顶层控件wind root4.geometry("800x600")#设置窗口大小 root4.title("测试集与训练集划分")#设置窗口标题 label1 = tk.Label(root4, text="测试集与训练集划分", font=("Arial", 16)) label1.pack() global NIrandom_state,NItest_size NIrandom_state= tk.IntVar() tk.Label(root4, text="random_state:").place(x=50, y=50) tk.Entry(root4, textvariable=NIrandom_state).place(x=190,y=50) NItest_size= tk.IntVar() tk.Label(root4, text="用于测试的数据集比例:").place(x=50,y=110) tk.Entry(root4, textvariable=NItest_size).place(x=190,y=110) # 添加按钮 global button1 button1 = tk.Button(root4, text="运算", font=("Arial", 12),command=button_click) button1.place(x=50,y=150) global button2 button2=tk.Button(root4,text="图表展示",font=("Arial", 12),command=chart) button2.place(x=100,y=150) # 添加文本框 global text1 text1 = tk.Text(root4, width=50, height=10) text1.place(x=50,y=200) # 绑定按钮def button_click(): global test,random random=int(NIrandom_state.get()) test=float(NItest_size.get()) global button1 result_dict = {} k_list = [1,3,5,7,9,11] for k in k_list: score,train_score = knn_score(k,X,y) result_dict[k] = [score,train_score] result = pd.DataFrame(result_dict).T.copy() result.columns = ['Test','Train'] text=tk.Text(root4) text.place(x=100, y=220) text.insert("end",X_train) text.insert("end",X_text) text.insert("end",y_train) text.insert("end",y_text) text1.delete(1.0, tk.END) text1.insert(tk.END, result) import tkinter as tk from matplotlib.figure import Figure from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg from matplotlib.backend_bases import key_press_handler import matplotlib.pyplot as plt %matplotlib inline def chart(): root5= tk.Toplevel() root5.title("结果图形") fig = plt.figure() k_list = [1,3,5,7,9,11] result_dict = {} canvas = FigureCanvasTkAgg(fig, master=root5) canvas.get_tk_widget().pack() canvas.draw() global result result = pd.DataFrame(result_dict).T.copy() plt.xticks(k_list) plt.show() root4.mainloop()其中有什么问题

另外，在函数 button_click() 中，变量 X_text 和 y_text 没有定义，会导致代码运行出错。其次，函数 chart() 中的 result_dict 变量没有被赋值，因此画图时会出错。此外，函数 button_click() 中的...

# 如果已经进行过特征筛选，则直接保留重要特征 if os.path.exists('model/easy_feature_select.csv'): df_importances = pd.read_csv('model/easy_feature_select.csv', encoding='gbk') important_features = df_importances.features.tolist() x_train, x_test = x_train[important_features], x_test[important_features] df_ft = df_ft[['label'] + important_features] # 如果为进行特征筛选，则直接删除无用特征 elif cfg_dict['features']['features_not_use_temp']!='': drop_features = cfg_dict['features']['features_not_use_temp'].split(',') x_train.drop(drop_features, axis=1, inplace=True) x_test.drop(drop_features, axis=1, inplace=True) # x_train, x_test = x_train[important_features], x_test[important_features] df_ft = df_ft.drop(drop_features, axis=1, inplace=True)

接着，代码根据重要特征列表，从 x_train 和 x_test 数据框中保留这些特征，同时从 df_ft 数据框中保留 'label' 列和重要特征列。如果文件 'model/easy_feature_select.csv' 不存在，则检查配置参数 cfg_dict['...

import pandas as pd from sklearn import metrics from sklearn.model_selection import train_test_split import xgboost as xgb import matplotlib.pyplot as plt import openpyxl # 导入数据集 df = pd.read_csv("/Users/mengzihan/Desktop/正式有血糖聚类前.csv") data=df.iloc[:,:35] target=df.iloc[:,-1] # 切分训练集和测试集 train_x, test_x, train_y, test_y = train_test_split(data,target,test_size=0.2,random_state=7) # xgboost模型初始化设置 dtrain=xgb.DMatrix(train_x,label=train_y) dtest=xgb.DMatrix(test_x) watchlist = [(dtrain,'train')] # booster: params={'booster':'gbtree', 'objective': 'binary:logistic', 'eval_metric': 'auc', 'max_depth':12, 'lambda':10, 'subsample':0.75, 'colsample_bytree':0.75, 'min_child_weight':2, 'eta': 0.025, 'seed':0, 'nthread':8, 'gamma':0.15, 'learning_rate' : 0.01} # 建模与预测：50棵树 bst=xgb.train(params,dtrain,num_boost_round=50,evals=watchlist) ypred=bst.predict(dtest) # 设置阈值、评价指标 y_pred = (ypred >= 0.5)*1 print ('Precesion: %.4f' %metrics.precision_score(test_y,y_pred)) print ('Recall: %.4f' % metrics.recall_score(test_y,y_pred)) print ('F1-score: %.4f' %metrics.f1_score(test_y,y_pred)) print ('Accuracy: %.4f' % metrics.accuracy_score(test_y,y_pred)) print ('AUC: %.4f' % metrics.roc_auc_score(test_y,ypred)) ypred = bst.predict(dtest) print("测试集每个样本的得分\n",ypred) ypred_leaf = bst.predict(dtest, pred_leaf=True) print("测试集每棵树所属的节点数\n",ypred_leaf) ypred_contribs = bst.predict(dtest, pred_contribs=True) print("特征的重要性\n",ypred_contribs ) xgb.plot_importance(bst,height=0.8,title='影响糖尿病的重要特征', ylabel='特征') plt.rc('font', family='Arial Unicode MS', size=14) plt.show()

1. 导入必要的库：pandas用于数据处理，sklearn中的metrics模块用于评价指标，train_test_split用于划分训练集和测试集，xgboost用于建模，matplotlib.pyplot用于画图，openpyxl用于读取Excel文件。...

def load_data(file_name): df = pd.read_csv('data/new_data/' + file_name, encoding='gbk') columns = df.columns df.fillna(df.mean(), inplace=True) return df class MyDataset(Dataset): def init(self, data): self.data = data def getitem(self, item): return self.data[item] def len(self): return len(self.data) def nn_seq_us(B): print('data processing...') dataset = load_data() # split train = dataset[:int(len(dataset) * 0.6)] val = dataset[int(len(dataset) * 0.6):int(len(dataset) * 0.8)] test = dataset[int(len(dataset) * 0.8):len(dataset)] m, n = np.max(train[train.columns[1]]), np.min(train[train.columns[1]]) def process(data, batch_size): load = data[data.columns[1]] load = load.tolist() data = data.values.tolist() load = (load - n) / (m - n) seq = [] for i in range(len(data) - 24): train_seq = [] train_label = [] for j in range(i, i + 24): x = [load[j]] train_seq.append(x) # for c in range(2, 8): # train_seq.append(data[i + 24][c]) train_label.append(load[i + 24]) train_seq = torch.FloatTensor(train_seq) train_label = torch.FloatTensor(train_label).view(-1) seq.append((train_seq, train_label)) # print(seq[-1]) seq = MyDataset(seq) seq = DataLoader(dataset=seq, batch_size=batch_size, shuffle=False, num_workers=0, drop_last=True) return seq Dtr = process(train, B) Val = process(val, B) Dte = process(test, B) return Dtr, Val, Dte, m, n这是关于什么的代码

这是一个关于神经网络序列预测的代码，它将数据集加载并进行预处理，然后将其分为训练、验证和测试集。代码中的 load_data 函数用于加载数据文件，MyDataset 类用于创建数据集对象，nn_seq_us 函数则用于对数据进行...

return data, label def len(self): return len(self.data)train_dataset = MyDataset(train, y[:split_boundary].values, time_steps, output_steps, target_index)test_ds = MyDataset(test, y[split_boundary:].values, time_steps, output_steps, target_index)class MyLSTMModel(nn.Module): def init(self): super(MyLSTMModel, self).init() self.rnn = nn.LSTM(input_dim, 16, 1, batch_first=True) self.flatten = nn.Flatten() self.fc1 = nn.Linear(16 * time_steps, 120) self.relu = nn.PReLU() self.fc2 = nn.Linear(120, output_steps) def forward(self, input): out, (h, c) = self.rnn(input) out = self.flatten(out) out = self.fc1(out) out = self.relu(out) out = self.fc2(out) return outepoch_num = 50batch_size = 128learning_rate = 0.001def train(): print('训练开始') model = MyLSTMModel() model.train() opt = optim.Adam(model.parameters(), lr=learning_rate) mse_loss = nn.MSELoss() data_reader = DataLoader(train_dataset, batch_size=batch_size, drop_last=True) history_loss = [] iter_epoch = [] for epoch in range(epoch_num): for data, label in data_reader: # 验证数据和标签的形状是否满足期望，如果不满足，则跳过这个批次 if data.shape[0] != batch_size or label.shape[0] != batch_size: continue train_ds = data.float() train_lb = label.float() out = model(train_ds) avg_loss = mse_loss(out, train_lb) avg_loss.backward() opt.step() opt.zero_grad() print('epoch {}, loss {}'.format(epoch, avg_loss.item())) iter_epoch.append(epoch) history_loss.append(avg_loss.item()) plt.plot(iter_epoch, history_loss, label='loss') plt.legend() plt.xlabel('iters') plt.ylabel('Loss') plt.show() torch.save(model.state_dict(), 'model_1')train()param_dict = torch.load('model_1')model = MyLSTMModel()model.load_state_dict(param_dict)model.eval()data_reader1 = DataLoader(test_ds, batch_size=batch_size, drop_last=True)res = []res1 = []# 在模型预测时，label 的处理for data, label in data_reader1: data = data.float() label = label.float() out = model(data) res.extend(out.detach().numpy().reshape(data.shape[0]).tolist()) res1.extend(label.numpy().tolist()) # 由于预测一步，所以无需 reshape，直接转为 list 即可title = "t321"plt.title(title, fontsize=24)plt.xlabel("time", fontsize=14)plt.ylabel("irr", fontsize=14)plt.plot(res, color='g', label='predict')plt.plot(res1, color='red', label='real')plt.legend()plt.grid()plt.show()的运算过程

然后定义了一个包含 LSTM 层的 MyLSTMModel 模型，并在 train 函数中使用 DataLoader 加载训练数据集，采用 Adam 优化器和 MSE 损失函数进行训练。训练过程中记录了每个 epoch 的损失值，并在训练结束后保存了模型...

def median_target(var): temp = data[data[var].notnull()] temp = temp[[var, 'Outcome']].groupby(['Outcome'])[[var]].median().reset_index() return temp data.loc[(data['Outcome'] == 0 ) & (data['Insulin'].isnull()), 'Insulin'] = 102.5 data.loc[(data['Outcome'] == 1 ) & (data['Insulin'].isnull()), 'Insulin'] = 169.5 data.loc[(data['Outcome'] == 0 ) & (data['Glucose'].isnull()), 'Glucose'] = 107 data.loc[(data['Outcome'] == 1 ) & (data['Glucose'].isnull()), 'Glucose'] = 1 data.loc[(data['Outcome'] == 0 ) & (data['SkinThickness'].isnull()), 'SkinThickness'] = 27 data.loc[(data['Outcome'] == 1 ) & (data['SkinThickness'].isnull()), 'SkinThickness'] = 32 data.loc[(data['Outcome'] == 0 ) & (data['BloodPressure'].isnull()), 'BloodPressure'] = 70 data.loc[(data['Outcome'] == 1 ) & (data['BloodPressure'].isnull()), 'BloodPressure'] = 74.5 data.loc[(data['Outcome'] == 0 ) & (data['BMI'].isnull()), 'BMI'] = 30.1 data.loc[(data['Outcome'] == 1 ) & (data['BMI'].isnull()), 'BMI'] = 34.3 target_col = ["Outcome"] cat_cols = data.nunique()[data.nunique() < 12].keys().tolist() cat_cols = [x for x in cat_cols ] #numerical columns num_cols = [x for x in data.columns if x not in cat_cols + target_col] #Binary columns with 2 values bin_cols = data.nunique()[data.nunique() == 2].keys().tolist() #Columns more than 2 values multi_cols = [i for i in cat_cols if i not in bin_cols] #Label encoding Binary columns le = LabelEncoder() for i in bin_cols : data[i] = le.fit_transform(data[i]) #Duplicating columns for multi value columns data = pd.get_dummies(data = data,columns = multi_cols ) #Scaling Numerical columns std = StandardScaler() scaled = std.fit_transform(data[num_cols]) scaled = pd.DataFrame(scaled,columns=num_cols) #dropping original values merging scaled values for numerical columns df_data_og = data.copy() data = data.drop(columns = num_cols,axis = 1) data = data.merge(scaled,left_index=True,right_index=True,how = "left") # Def X and Y X = data.drop('Outcome', axis=1) y = data['Outcome'] X_train, X_test, y_train, y_test = train_test_split(X, y, train_size=0.8, shuffle=True, random_state=1) y_train = to_categorical(y_train) y_test = to_categorical(y_test)

这段代码看起来是在进行数据预处理，首先定义了一个函数median_target，用于计算每个类别中某个特征的中位数。然后根据不同的Outcome值，对缺失值进行填充。接着将数据集中的分类特征进行编码，将二元特征进行...

将下列代码变为伪代码def median_target（var）： temp = data[data[var].notnull（）] temp = temp[[var， 'Outcome']].groupby（['Outcome']）[[var]].median（）.reset_index（） return temp data.loc[（data['Outcome'] == 0 ） & （data['Insulin'].isnull（））， 'Insulin'] = 102.5 data.loc[（data['Result'] == 1 ） & （data['Insulin'].isnull（））， 'Insulin'] = 169.5 data.loc[（data['Result'] == 0 ） & （data['Glucose'].isnull（））， 'Glucose'] = 107 data.loc[（data['Result'] == 1 ） & （data['Glucose'].isnull（））， 'Glucose'] = 1 data.loc[（data['Result'] == 0 ） & （data['SkinThickness'].isnull（））， 'SkinThickness'] = 27 data.loc[（data['Result'] == 1 ） & （data['SkinThickness'].isnull（））， 'SkinThickness'] = 32 data.loc[（data['Result'] == 0 ） & （data['BloodPressure'].isnull（））， 'BloodPressure'] = 70 data.loc[（data['Result'] == 1 ） & （data['BloodPressure'].isnull（））， 'BloodPressure'] = 74.5 data.loc[（data['Result'] == 0 ） & （data['BMI'].isnull（））， 'BMI'] = 30.1 data.loc[（data['Result'] == 1 ） & （data['BMI'].isnull（））， 'BMI'] = 34.3 target_col = [“Outcome”] cat_cols = data.nunique（）[data.nunique（） < 12].keys（）.tolist（） cat_cols = [x for x in cat_cols ] #numerical列 num_cols = [x for x in data.columns if x 不在 cat_cols + target_col] #Binary列有 2 个值 bin_cols = data.nunique（）[data.nunique（） == 2].keys（）.tolist（） #Columns 2 个以上的值 multi_cols = [i 表示 i in cat_cols if i in bin_cols] #Label编码二进制列 le = LabelEncoder（） for i in bin_cols ： data[i] = le.fit_transform（data[i]） #Duplicating列用于多值列 data = pd.get_dummies（data = data，columns = multi_cols ） #Scaling 数字列 std = StandardScaler（）缩放 = std.fit_transform（数据[num_cols]）缩放 = pd。数据帧（缩放，列=num_cols） #dropping原始值合并数字列的缩放值 df_data_og = 数据.copy（）数据 = 数据.drop（列 = num_cols，轴 = 1）数据 = 数据.合并（缩放，left_index=真，right_index=真，如何 = “左”） # 定义 X 和 Y X = 数据.drop（'结果'，轴=1） y = 数据['结果'] X_train， X_test， y_train， y_test = train_test_split（X， y， train_size=0.8， shuffle=True， random_state=1） y_train = to_categorical（y_train） y_test = to_categorical（y_test）

function median_target(var) ...X_train, X_test, y_train, y_test = train_test_split(X, y, train_size=0.8, shuffle=True, random_state=1); y_train = to_categorical(y_train); y_test = to_categorical(y_test);

基于Web前端技术期末大作业源码+文档+高分项目+全部资料.zip

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上市公司企业-处理结果数据.xlsx

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