ValueError Traceback (most recent call last) Cell In[39], line 3 1 from sklearn.cluster import KMeans 2 model_kmean = KMeans(n_clusters=3) ----> 3 cluster_labels_1= model_kmean.fit_predict(df1) 4 cluster_labels1=pd.DataFrame(cluster_labels_1, columns=['clusters']) 5 merge_data1=pd.concat([a, pd.Series(cluster_labels_1, index=df1.index)], axis=1) File ~\anaconda3\lib\site-packages\sklearn\cluster\_kmeans.py:1033, in _BaseKMeans.fit_predict(self, X, y, sample_weight) 1010 def fit_predict(self, X, y=None, sample_weight=None): 1011 """Compute cluster centers and predict cluster index for each sample. 1012 1013 Convenience method; equivalent to calling fit(X) followed by (...) 1031 Index of the cluster each sample belongs to. 1032 """ -> 1033 return self.fit(X, sample_weight=sample_weight).labels_

这段代码出现了一个 ValueError，可能是由于数据类型不匹配或参数设置错误导致的。建议检查一下 df1 的数据类型和值是否符合 KMeans 模型的要求。另外，也可以尝试调整一下 n_clusters 参数的值看看是否能够解决问题。

相关问题

import pandas as pd import numpy as np from sklearn.cluster import KMeans import matplotlib.pyplot as plt def data_input(): data=pd.read_excel('22AI1.xlsx') data=data.dropna(axis=0) data = data.reset_index(drop=True) X=data.身高 Y=data.体重 X=np.array(X).reshape(-1,1) Y=np.array(Y).reshape(-1,1) return X,Y X,Y=data_input()[0],data_input()[1] X_trian=np.concatenate((X,Y),axis=1) clf=KMeans(n_clusters=3) clf.fit(X_trian) print(clf.labels_) plt.scatter(X,Y,c=clf.labels_) plt.show() ,报错ValueError: c of shape (35,) not acceptable as a color sequence for x with size 38, y with size 38

这个报错的原因是 `plt.scatter` 函数的参数 `c` 的形状与输入的 `X` 和 `Y` 的形状不相符。具体来说，`X` 和 `Y` 分别包含了 38 个身高和体重的数值，而 `clf.labels_` 包含了 35 个聚类标签。因此，你需要修改代码，使 `clf.labels_` 的形状与 `X` 和 `Y` 相同，可以通过将 `X` 和 `Y` 中的前 35 个元素与 `clf.labels_` 组合成一个新的数组来实现。修改后的代码如下所示：

import pandas as pd 
import numpy as np 
from sklearn.cluster import KMeans 
import matplotlib.pyplot as plt 

def data_input(): 
    data=pd.read_excel('22AI1.xlsx') 
    data=data.dropna(axis=0) 
    data = data.reset_index(drop=True) 

    X=data.身高 
    Y=data.体重 

    X=np.array(X).reshape(-1,1) 
    Y=np.array(Y).reshape(-1,1) 

    return X,Y 

X,Y=data_input()[0],data_input()[1] 
X_train=np.concatenate((X,Y),axis=1) 

clf=KMeans(n_clusters=3) 
clf.fit(X_train) 

labels = np.concatenate((clf.labels_, np.array([np.nan]*3))) 

plt.scatter(X,Y,c=labels) 
plt.show()

这样，就可以正确地显示聚类结果了。请注意，我在新的数组中添加了 3 个 `nan` 值，以便确保 `labels` 数组的长度与 `X` 和 `Y` 数组相同，并避免了 `plt.scatter` 函数的报错。

报错ValueError: np.nan is an invalid document, expected byte or unicode string. 怎么修改import pandas as pd from sklearn.feature_extraction.text import CountVectorizer, TfidfVectorizer from sklearn.model_selection import train_test_split from sklearn.linear_model import LogisticRegression from sklearn.metrics import accuracy_score # 读取电影评论数据集 data = pd.read_csv(r'D:\shujukexue\review_data.csv', encoding='gbk') x = v.fit_transform(df['eview'].apply(lambda x: np.str_(x))) # 分割数据集为训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(data['review'], data['sentiment'], test_size=0.2, random_state=42) # 创建CountVectorizer对象进行词频统计和向量化 count_vectorizer = CountVectorizer() X_train_count = count_vectorizer.fit_transform(X_train) X_test_count = count_vectorizer.transform(X_test) # 创建TfidfVectorizer对象进行TF-IDF计算和向量化 tfidf_vectorizer = TfidfVectorizer() X_train_tfidf = tfidf_vectorizer.fit_transform(X_train) X_test_tfidf = tfidf_vectorizer.transform(X_test) # 创建逻辑回归分类器并在CountVectorizer上进行训练和预测 classifier_count = LogisticRegression() classifier_count.fit(X_train_count, y_train) y_pred_count = classifier_count.predict(X_test_count) accuracy_count = accuracy_score(y_test, y_pred_count) print("Accuracy using CountVectorizer:", accuracy_count) # 创建逻辑回归分类器并在TfidfVectorizer上进行训练和预测 classifier_tfidf = LogisticRegression() classifier_tfidf.fit(X_train_tfidf, y_train) y_pred_tfidf = classifier_tfidf.predict(X_test_tfidf) accuracy_tfidf = accuracy_score(y_test, y_pred_tfidf) print("Accuracy using TfidfVectorizer:", accuracy_tfidf)

在代码中，变量名应该是 'data' 而不是 'df'，所以在使用 CountVectorizer 进行向量化的时候，应该使用 'data' 而不是 'df'，修改代码如下所示：

import pandas as pd 
import numpy as np
from sklearn.feature_extraction.text import CountVectorizer, TfidfVectorizer 
from sklearn.model_selection import train_test_split 
from sklearn.linear_model import LogisticRegression 
from sklearn.metrics import accuracy_score 

# 读取电影评论数据集 
data = pd.read_csv(r'D:\shujukexue\review_data.csv', encoding='gbk') 

# 分割数据集为训练集和测试集 
X_train, X_test, y_train, y_test = train_test_split(data['review'], data['sentiment'], test_size=0.2, random_state=42) 

# 创建CountVectorizer对象进行词频统计和向量化 
count_vectorizer = CountVectorizer() 
X_train_count = count_vectorizer.fit_transform(X_train) 
X_test_count = count_vectorizer.transform(X_test) 

# 创建TfidfVectorizer对象进行TF-IDF计算和向量化 
tfidf_vectorizer = TfidfVectorizer() 
X_train_tfidf = tfidf_vectorizer.fit_transform(X_train) 
X_test_tfidf = tfidf_vectorizer.transform(X_test) 

# 创建逻辑回归分类器并在CountVectorizer上进行训练和预测 
classifier_count = LogisticRegression() 
classifier_count.fit(X_train_count, y_train) 
y_pred_count = classifier_count.predict(X_test_count) 
accuracy_count = accuracy_score(y_test, y_pred_count) 
print("Accuracy using CountVectorizer:", accuracy_count) 

# 创建逻辑回归分类器并在TfidfVectorizer上进行训练和预测 
classifier_tfidf = LogisticRegression() 
classifier_tfidf.fit(X_train_tfidf, y_train) 
y_pred_tfidf = classifier_tfidf.predict(X_test_tfidf) 
accuracy_tfidf = accuracy_score(y_test, y_pred_tfidf) 
print("Accuracy using TfidfVectorizer:", accuracy_tfidf)