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檢查輸入時出錯:期望的dense_input有形狀(21,)但是有形狀的數組(1,)

[英]Error when checking input: expected dense_input to have shape (21,) but got array with shape (1,)

如何修復輸入數組以滿足輸入形狀?

我試圖轉輸入數組,如所描述這里 ,但誤差是相同的。

ValueError:檢查輸入時出錯:期望dense_input具有形狀(21,)但是得到了具有形狀的數組(1,)

import tensorflow as tf
import numpy as np

model = tf.keras.models.Sequential([
  tf.keras.layers.Dense(40, input_shape=(21,), activation=tf.nn.relu),
  tf.keras.layers.Dropout(0.2),
  tf.keras.layers.Dense(1, activation=tf.nn.softmax)
])
model.compile(optimizer='adam',
              loss='categorical_crossentropy',
              metrics=['accuracy'])

arrTest1 = np.array([0.1,0.1,0.1,0.1,0.1,0.5,0.1,0.0,0.1,0.6,0.1,0.1,0.0,0.0,0.0,0.1,0.0,0.0,0.1,0.0,0.0])
scores = model.predict(arrTest1)
print(scores)

您的測試數組arrTest1是21的1d向量:

>>> arrTest1.ndim
1

您嘗試為模型提供的功能是一排21個功能。 您只需要一組括號:

arrTest1 = np.array([[0.1, 0.1, 0.1, 0.1, 0.1, 0.5, 0.1, 0., 0.1, 0.6, 0.1, 0.1, 0., 0., 0., 0.1, 0., 0., 0.1, 0., 0.]])

現在你有一行有21個值:

>>> arrTest1.shape
(1, 21)

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