期望密集具有形状,但具有形状的阵列 [英] expected dense to have shape but got array with shape
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问题描述
在keras中运行文本分类模型时,调用model.predict函数时出现以下错误.我到处搜索了,但对我来说不起作用.
I am getting the following error while calling the model.predict function when running a text classification model in keras. I searched the everywhere but it isn't working for me.
ValueError: Error when checking input: expected dense_1_input to have shape (100,) but got array with shape (1,)
我的数据有5个类别,总共只有15个示例.下面是数据集
My data has 5 classes and has a total of 15 examples only. Below is the dataset
query tags
0 hi intro
1 how are you wellb
2 hello intro
3 what's up wellb
4 how's life wellb
5 bye gb
6 see you later gb
7 good bye gb
8 thanks gratitude
9 thank you gratitude
10 that's helpful gratitude
11 I am great revertfine
12 fine revertfine
13 I am fine revertfine
14 good revertfine
这是我模型的代码
from keras.preprocessing.text import Tokenizer
from sklearn.preprocessing import LabelBinarizer
from keras.models import Sequential
import pandas as pd
from keras.layers import Dense, Activation
data = pd.read_csv('text_class.csv')
train_text = data['query']
train_labels = data['tags']
tokenize = Tokenizer(num_words=100)
tokenize.fit_on_texts(train_text)
x_data = tokenize.texts_to_matrix(train_text)
encoder = LabelBinarizer()
encoder.fit(train_labels)
y_data = encoder.transform(train_labels)
model = Sequential()
model.add(Dense(512, input_shape=(100,)))
model.add(Activation('relu'))
model.add(Dense(5))
model.add(Activation('softmax'))
model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['acc'])
model.fit(x_data, y_data, batch_size=8, epochs=10)
predictions = model.predict(x_data[0])
tag_labels = encoder.classes_
predicted_tags = tag_labels[np.argmax(predictions)]
print (predicted_tags)
我无法弄清楚问题出在哪里以及如何解决.
I am not able to figure out where the problem lies and how to fix it.
推荐答案
x_data
是形状为(15, 100)
print(x_data.shape)
但是x_data[0]
是形状为(100, )
print(x_data[0].shape)
这会带来问题.
使用切片x_data[0:1]
将其获取为形状为(1, 100)
的二维数组
Use slicing x_data[0:1]
to get it as 2-dimensional array with shape (1, 100)
print(x_data[0:1].shape)
它将起作用
predictions = model.predict(x_data[0:1])
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