我有一个csv文件,结构是CAT1,CAT2,TITLE,URL,CONTENT
,其中CAT1、CAT2、TITLE和CONTENT均为中文。
我想使用X(TITLE)和feature(CAT1,CAT2)训练LinearSVC
或MultinomialNB
,但两者都报错了。以下是我的代码:
PS:我通过scikit-learn文本分析教程exercise_02_sentiment.py的例子编写了下面的代码。
import numpy as np
import csv
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.svm import LinearSVC
from sklearn.pipeline import Pipeline
label_list = []
def label_map_target(label):
''' map chinese feature name to integer '''
try:
idx = label_list.index(label)
except ValueError:
idx = len(label_list)
label_list.append(label)
return idx
c1_list = []
c2_list = []
title_list = []
with open(csv_file, 'r') as f:
# row_from_csv is for shorting this example
for row in row_from_csv(f):
c1_list.append(label_map_target(row[0])
c2_list.append(label_map_target(row[1])
title_list.append(row[2])
data = np.array(title_list)
target = np.array([c1_list, c2_list])
print target.shape
# (2, 4405)
target = target.reshape(4405,2)
print target.shape
# (4405, 2)
docs_train, docs_test, y_train, y_test = train_test_split(
data, target, test_size=0.25, random_state=None)
# vect = TfidfVectorizer(tokenizer=jieba_tokenizer, min_df=3, max_df=0.95)
# use custom chinese tokenizer get same error
vect = TfidfVectorizer(min_df=3, max_df=0.95)
docs_train= vect.fit_transform(docs_train)
clf = LinearSVC()
clf.fit(docs_train, y_train)
错误:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-24-904eb9af02cd> in <module>()
1 clf = LinearSVC()
----> 2 clf.fit(docs_train, y_train)
C:\Python27\lib\site-packages\sklearn\svm\classes.pyc in fit(self, X, y)
198
199 X, y = check_X_y(X, y, accept_sparse='csr',
--> 200 dtype=np.float64, order="C")
201 self.classes_ = np.unique(y)
202
C:\Python27\lib\site-packages\sklearn\utils\validation.pyc in check_X_y(X, y, accept_sparse, dtype, order, copy, force_all_finite, ensure_2d, allow_nd, multi_output, ensure_min_samples, ensure_min_features, y_numeric)
447 dtype=None)
448 else:
--> 449 y = column_or_1d(y, warn=True)
450 _assert_all_finite(y)
451 if y_numeric and y.dtype.kind == 'O':
C:\Python27\lib\site-packages\sklearn\utils\validation.pyc in column_or_1d(y, warn)
483 return np.ravel(y)
484
--> 485 raise ValueError("bad input shape {0}".format(shape))
486
487
ValueError: bad input shape (3303, 2)
x_train
,你的代码中没有赋值。 - meelotarget
有两列,应该只有一个目标值。 - meelo[SOLVED]
,StackOverflow不是一个论坛。如果你找到了答案,你可以回答自己的问题并接受你的答案,这将标记该问题已关闭。 - Burhan Khalid