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Java的家庭理财系统设计与开发-金融管理-家庭财产管理-实用性强

内容概要：文章探讨了互联网时代的背景下开发一个实用的家庭理财系统的重要性。文中分析了国内外家庭理财的现状及存在的问题，阐述了开发此系统的目的——对家庭财产进行一体化管理，提供统计、预测功能。系统涵盖了家庭成员管理、用户认证管理、账单管理等六大功能模块，能够满足用户多方面查询及统计需求，并保证数据的安全性与完整性。设计中运用了先进的技术栈如SSM框架（Spring、SpringMVC、Mybatis），并采用MVC设计模式确保软件结构合理高效。适用人群：对于希望科学地管理和规划个人或家庭财务的普通民众；从事财务管理相关专业的学生；有兴趣于家政学、经济学等领域研究的专业人士。使用场景及目标：适用于日常家庭财务管理的各个场景，帮助用户更好地了解自己的消费习惯和资金状况；为目标客户提供一套稳定可靠的解决方案，助力家庭财富增长。其他说明：文章还包括系统设计的具体方法与技术选型的理由，以及项目实施过程中的难点讨论。对于开发者而言，不仅提供了详尽的技术指南，还强调了用户体验的重要性。

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