import numpy as npimport pandas as pdfrom sklearn.model_selection import train_test_splitfrom sklearn.svm import SVCfrom sklearn.metrics import accuracy_score, confusion_matriximport matplotlib.pyplot as pltimport xlrd# 加载数据集并进行预处理def load_data(filename): data = pd.read_excel(filename) data.dropna(inplace=True) X = data.drop('label', axis=1) X = (X - X.mean()) / X.std() y = data['label'] return X, y# 训练SVM分类器def train_svm(X_train, y_train, kernel='rbf', C=1, gamma=0.1): clf = SVC(kernel=kernel, C=C, gamma=gamma) clf.fit(X_train, y_train) return clf# 预测新的excel文件并输出预测结果excel、精度和混淆矩阵图def predict_svm(clf, X_test, y_test, filename): y_pred = clf.predict(X_test) accuracy = accuracy_score(y_test, y_pred) cm = confusion_matrix(y_test, y_pred) # 输出预测结果excel data = pd.read_excel(filename) data['predicted_label'] = pd.Series(y_pred, index=data.index) data.to_excel('predicted_result.xlsx', index=False) # 绘制混淆矩阵图 plt.imshow(cm, cmap=plt.cm.Blues) plt.title('Confusion matrix') plt.colorbar() tick_marks = np.arange(len(set(y_test))) plt.xticks(tick_marks, sorted(set(y_test)), rotation=45) plt.yticks(tick_marks, sorted(set(y_test))) plt.xlabel('Predicted Label') plt.ylabel('True Label') plt.show() return accuracy# 加载数据集并划分训练集和验证集data = pd.read_excel('data.xlsx')data.dropna(inplace=True)X = data.drop('label', axis=1)X = (X - X.mean()) / X.std()y = data['label']X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)# 训练SVM分类器clf = train_svm(X_train, y_train)# 预测新的excel文件accuracy = predict_svm(clf, X_test, y_test, 'test_data.xlsx')# 输出精度print('Accuracy:', accuracy)改进，预测新的结果输出在新表中

时间: 2024-02-18 11:05:18 浏览: 29
您好，根据您的要求，我稍作修改，将输出预测结果的excel文件名改为新的文件名，并在新的文件中保存预测结果。修改后的代码如下： ``` import numpy as np import pandas as pd from sklearn.model_selection import train_test_split from sklearn.svm import SVC from sklearn.metrics import accuracy_score, confusion_matrix import matplotlib.pyplot as plt import xlrd # 加载数据集并进行预处理 def load_data(filename): data = pd.read_excel(filename) data.dropna(inplace=True) X = data.drop('label', axis=1) X = (X - X.mean()) / X.std() y = data['label'] return X, y # 训练SVM分类器 def train_svm(X_train, y_train, kernel='rbf', C=1, gamma=0.1): clf = SVC(kernel=kernel, C=C, gamma=gamma) clf.fit(X_train, y_train) return clf # 预测新的excel文件并输出预测结果excel、精度和混淆矩阵图 def predict_svm(clf, X_test, y_test, filename, result_file): y_pred = clf.predict(X_test) accuracy = accuracy_score(y_test, y_pred) cm = confusion_matrix(y_test, y_pred) # 输出预测结果excel data = pd.read_excel(filename) data['predicted_label'] = pd.Series(y_pred, index=data.index) data.to_excel(result_file, index=False) # 绘制混淆矩阵图 plt.imshow(cm, cmap=plt.cm.Blues) plt.title('Confusion matrix') plt.colorbar() tick_marks = np.arange(len(set(y_test))) plt.xticks(tick_marks, sorted(set(y_test)), rotation=45) plt.yticks(tick_marks, sorted(set(y_test))) plt.xlabel('Predicted Label') plt.ylabel('True Label') plt.show() return accuracy # 加载数据集并划分训练集和验证集 data = pd.read_excel('data.xlsx') data.dropna(inplace=True) X = data.drop('label', axis=1) X = (X - X.mean()) / X.std() y = data['label'] X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) # 训练SVM分类器 clf = train_svm(X_train, y_train) # 预测新的excel文件 accuracy = predict_svm(clf, X_test, y_test, 'test_data.xlsx', 'predicted_result.xlsx') # 输出精度 print('Accuracy:', accuracy) ``` 在这个修改后的代码中，`predict_svm` 函数中新增了一个参数 `result_file`，用于指定预测结果输出的文件名。在预测结果输出时，将预测结果保存为新的excel文件，文件名即为 `result_file` 参数所指定的文件名。

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data = pd.read_excel(filename) data.dropna(inplace=True) X = data[['feature1', 'feature2']] X = (X - X.mean()) / X.std() y = data['label'] return X, y 其余代码不需要修改。

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我没有发现代码中的错误。但是，你需要明确一些内容： 1. 你需要保证数据集的路径正确，并且数据集的格式正确。 2. 如果使用了 streamlit_echarts 库，在运行代码前需要先安装该库，可以通过 !...

import pandas as pd data = pd.read_csv(C:\Users\Administrator\Desktop\pythonsjwj\weibo_senti_100k.csv') data = data.dropna(); data.shape data.head() import jieba data['data_cut'] = data['review'].apply(lambda x: list(jieba.cut(x))) data.head() with open('stopword.txt','r',encoding = 'utf-8') as f: stop = f.readlines() import re stop = [re.sub(' |\n|\ufeff','',r) for r in stop] data['data_after'] = [[i for i in s if i not in stop] for s in data['data_cut']] data.head() w = [] for i in data['data_after']: w.extend(i) num_data = pd.DataFrame(pd.Series(w).value_counts()) num_data['id'] = list(range(1,len(num_data)+1)) a = lambda x:list(num_data['id'][x]) data['vec'] = data['data_after'].apply(a) data.head() from wordcloud import WordCloud import matplotlib.pyplot as plt num_words = [''.join(i) for i in data['data_after']] num_words = ''.join(num_words) num_words= re.sub(' ','',num_words) num = pd.Series(jieba.lcut(num_words)).value_counts() wc_pic = WordCloud(background_color='white',font_path=r'C:\Windows\Fonts\simhei.ttf').fit_words(num) plt.figure(figsize=(10,10)) plt.imshow(wc_pic) plt.axis('off') plt.show() from sklearn.model_selection import train_test_split from keras.preprocessing import sequence maxlen = 128 vec_data = list(sequence.pad_sequences(data['vec'],maxlen=maxlen)) x,xt,y,yt = train_test_split(vec_data,data['label'],test_size = 0.2,random_state = 123) import numpy as np x = np.array(list(x)) y = np.array(list(y)) xt = np.array(list(xt)) yt = np.array(list(yt)) x=x[:2000,:] y=y[:2000] xt=xt[:500,:] yt=yt[:500] from sklearn.svm import SVC clf = SVC(C=1, kernel = 'linear') clf.fit(x,y) from sklearn.metrics import classification_report test_pre = clf.predict(xt) report = classification_report(yt,test_pre) print(report) from keras.optimizers import SGD, RMSprop, Adagrad from keras.utils import np_utils from keras.models import Sequential from keras.layers.core import Dense, Dropout, Activation from keras.layers.embeddings import Embedding from keras.layers.recurrent import LSTM, GRU model = Sequential() model.add(Embedding(len(num_data['id'])+1,256)) model.add(Dense(32, activation='sigmoid', input_dim=100)) model.add(LSTM(128)) model.add(Dense(1)) model.add(Activation('sigmoid')) model.summary() import matplotlib.pyplot as plt import matplotlib.image as mpimg from keras.utils import plot_model plot_model(model,to_file='Lstm2.png',show_shapes=True) ls = mpimg.imread('Lstm2.png') plt.imshow(ls) plt.axis('off') plt.show() model.compile(loss='binary_crossentropy',optimizer='Adam',metrics=["accuracy"]) model.fit(x,y,validation_data=(x,y),epochs=15)

from sklearn.model_selection import train_test_split from sklearn.svm import SVC from sklearn.metrics import classification_report # 将数据集划分为训练集和测试集 x, xt, y, yt = train_test_split(vec_...

分析以下代码#!/usr/bin/python # -*- coding:utf-8 -*- import numpy as np import pandas as pd import matplotlib as mpl import matplotlib.pyplot as plt from sklearn import svm from sklearn.model_selection import train_test_split from sklearn.metrics import accuracy_score # 'sepal length', 'sepal width', 'petal length', 'petal width' iris_feature = u'花萼长度', u'花萼宽度', u'花瓣长度', u'花瓣宽度' if __name__ == "__main__": path = 'D:\\iris.data' # 数据文件路径 data = pd.read_csv(path, header=None) x, y = data[range(4)], data[4] y = pd.Categorical(y).codes x = x[[0, 1]] x_train, x_test, y_train, y_test = train_test_split(x, y, random_state=1, train_size=0.6) # 分类器 clf = svm.SVC(C=0.1, kernel='linear', decision_function_shape='ovr') # clf = svm.SVC(C=0.8, kernel='rbf', gamma=20, decision_function_shape='ovr') clf.fit(x_train, y_train.ravel()) # 准确率 print (clf.score(x_train, y_train)) # 精度 print ('训练集准确率：', accuracy_score(y_train, clf.predict(x_train))) print (clf.score(x_test, y_test)) print ('测试集准确率：', accuracy_score(y_test, clf.predict(x_test))) # decision_function print ('decision_function:\n', clf.decision_function(x_train)) print ('\npredict:\n', clf.predict(x_train)) # 画图 x1_min, x2_min = x.min() x1_max, x2_max = x.max() x1, x2 = np.mgrid[x1_min:x1_max:500j, x2_min:x2_max:500j] # 生成网格采样点 grid_test = np.stack((x1.flat, x2.flat), axis=1) # 测试点 # print 'grid_test = \n', grid_test # Z = clf.decision_function(grid_test) # 样本到决策面的距离 # print Z grid_hat = clf.predict(grid_test) # 预测分类值 grid_hat = grid_hat.reshape(x1.shape) # 使之与输入的形状相同 mpl.rcParams['font.sans-serif'] = [u'SimHei'] mpl.rcParams['axes.unicode_minus'] = False cm_light = mpl.colors.ListedColormap(['#A0FFA0', '#FFA0A0', '#A0A0FF']) cm_dark = mpl.colors.ListedColormap(['g', 'r', 'b']) plt.figure(facecolor='w') plt.pcolormesh(x1, x2, grid_hat, shading='auto', cmap=cm_light) plt.scatter(x[0], x[1], c=y, edgecolors='k', s=50, cmap=cm_dark) # 样本 plt.scatter(x_test[0], x_test[1], s=120, facecolors='none', zorder=10) # 圈中测试集样本 plt.xlabel(iris_feature[0], fontsize=13) plt.ylabel(iris_feature[1], fontsize=13) plt.xlim(x1_min, x1_max) plt.ylim(x2_min, x2_max) plt.title(u'鸢尾花SVM二特征分类', fontsize=16) plt.grid(b=True, ls=':') plt.tight_layout(pad=1.5) plt.show()

1. 导入必要的库，包括 numpy、pandas、matplotlib、sklearn 中的 svm、train_test_split 和 accuracy_score。 2. 读取鸢尾花数据集，将前四列作为特征值 x，将最后一列作为目标值 y，并将 y 转换为数字编码。 3. ...

使用sklearn预测走势_使用python+sklearn实现stacking方法来组合预测

from sklearn.model_selection import train_test_split from sklearn.linear_model import LogisticRegression from sklearn.neighbors import KNeighborsClassifier from sklearn.tree import ...

AttributeError: 'DataFrame' object has no attribute 'data'. Did you mean: '_data'?

from sklearn.model_selection import train_test_split from sklearn.preprocessing import StandardScaler from sklearn.linear_model import Ridge from sklearn.neural_network import MLPRegressor from ...

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