我在理解如何转换我的数据以提供给网络时遇到问题（我认为 lstm 网络会有所帮助，因为我的数据主要是时间序列类型并且还有一些时间信息，所以......）。
这里是数据格式 前 6 列代表一秒钟的数据（larger_corr、shorter_corr、noiseratio、x、y、z） 然后是相应的输出特征，然后是下一秒数据。
但是为了准备训练数据，我怎样才能发送 6 列数据，然后是接下来的 6 列。所有列的长度都是 40。
我不确定我是否表达得足够清楚
如果您需要任何其他信息，请告诉我。
【问题讨论】：
标签： python tensorflow keras lstm data-preprocessing
您可以尝试按如下方式准备数据，但请注意，为了确保可读性，我只使用了 12 列：
import pandas as pd
import numpy as np
import tensorflow as tf
import tabulate
np.random.seed(0)
df = pd.DataFrame({
'larger_corr' : np.random.randn(25),
'shorter_corr' : np.random.randn(25),
'noiseratio' : np.random.randn(25),
'x' : np.random.randn(25),
'y' : np.random.randn(25),
'z' : np.random.randn(25),
'output' : np.random.randint(0,2,25),
'larger_corr.1' : np.random.randn(25),
'shorter_corr.1' : np.random.randn(25),
'noiseratio.1' : np.random.randn(25),
'x.1' : np.random.randn(25),
'y.1' : np.random.randn(25),
'z.1' : np.random.randn(25),
'output.1' : np.random.randint(0,2,25)
})
print(df.to_markdown())
y1, y2 = df.pop('output').to_numpy(), df.pop('output.1').to_numpy()
data = df.to_numpy()
x1, x2 = np.array_split(data, 2, axis=1)
x1 = np.expand_dims(x1, axis=1) # add timestep dimension
x2 = np.expand_dims(x2, axis=1) # add timestep dimension
X = np.concatenate([x1, x2])
Y = np.concatenate([y1, y1])
print('Shape of X -->', X.shape, 'Shape of labels -->', Y.shape)
| | larger_corr | shorter_corr | noiseratio | x | y | z | output | larger_corr.1 | shorter_corr.1 | noiseratio.1 | x.1 | y.1 | z.1 | output.1 |
|---:|--------------:|---------------:|-------------:|-----------:|----------:|-----------:|---------:|----------------:|-----------------:|---------------:|-----------:|-----------:|------------:|-----------:|
| 0 | 1.76405 | -1.45437 | -0.895467 | -0.68481 | 1.88315 | -0.149635 | 1 | 0.438871 | -0.244179 | -0.891895 | -0.617166 | 1.14367 | -0.936916 | 0 |
| 1 | 0.400157 | 0.0457585 | 0.386902 | -0.870797 | -1.34776 | -0.435154 | 1 | 0.63826 | 0.475261 | 0.570081 | -1.77556 | -0.188056 | -1.97935 | 0 |
| 2 | 0.978738 | -0.187184 | -0.510805 | -0.57885 | -1.27048 | 1.84926 | 0 | 2.01584 | -0.714216 | 2.66323 | -1.11821 | 1.24678 | 0.445384 | 0 |
| 3 | 2.24089 | 1.53278 | -1.18063 | -0.311553 | 0.969397 | 0.672295 | 0 | -0.243653 | -1.18694 | 0.410289 | -1.60639 | -0.253884 | -0.195333 | 1 |
| 4 | 1.86756 | 1.46936 | -0.0281822 | 0.0561653 | -1.17312 | 0.407462 | 1 | 1.53384 | 0.608891 | 0.485652 | -0.814676 | -0.870176 | -0.202716 | 1 |
| 5 | -0.977278 | 0.154947 | 0.428332 | -1.16515 | 1.94362 | -0.769916 | 1 | 0.76475 | 0.504223 | 1.31153 | 0.321281 | 0.0196537 | 0.219389 | 0 |
| 6 | 0.950088 | 0.378163 | 0.0665172 | 0.900826 | -0.413619 | 0.539249 | 0 | -2.45668 | -0.513996 | -0.235649 | -0.12393 | -1.11437 | -1.03016 | 0 |
| 7 | -0.151357 | -0.887786 | 0.302472 | 0.465662 | -0.747455 | -0.674333 | 1 | -1.70365 | 0.818475 | -1.48018 | 0.0221213 | 0.607842 | -0.929744 | 0 |
| 8 | -0.103219 | -1.9808 | -0.634322 | -1.53624 | 1.92294 | 0.0318306 | 1 | 0.420153 | 1.1566 | -0.0214848 | -0.321287 | 0.457237 | -2.55857 | 1 |
| 9 | 0.410599 | -0.347912 | -0.362741 | 1.48825 | 1.48051 | -0.635846 | 1 | -0.298149 | -0.803689 | 1.05279 | 0.692618 | 0.875539 | 1.6495 | 0 |
| 10 | 0.144044 | 0.156349 | -0.67246 | 1.89589 | 1.86756 | 0.676433 | 1 | 0.263602 | -0.551562 | -0.117402 | -0.353524 | 0.346481 | 0.611738 | 0 |
| 11 | 1.45427 | 1.23029 | -0.359553 | 1.17878 | 0.906045 | 0.576591 | 1 | 0.731266 | -0.332414 | 1.82851 | 0.81229 | -0.454874 | -1.05194 | 1 |
| 12 | 0.761038 | 1.20238 | -0.813146 | -0.179925 | -0.861226 | -0.208299 | 1 | 0.22807 | 1.84452 | -0.0166771 | -1.14179 | 0.198095 | -0.754946 | 0 |
| 13 | 0.121675 | -0.387327 | -1.72628 | -1.07075 | 1.91006 | 0.396007 | 0 | -2.02852 | -0.422776 | 1.87011 | -0.287549 | 0.391408 | 0.623188 | 1 |
| 14 | 0.443863 | -0.302303 | 0.177426 | 1.05445 | -0.268003 | -1.09306 | 0 | 0.96619 | 0.487659 | -0.380307 | 1.31554 | -3.17786 | 0.00470758 | 0 |
| 15 | 0.333674 | -1.04855 | -0.401781 | -0.403177 | 0.802456 | -1.49126 | 1 | -0.186922 | -0.375828 | 0.428698 | 0.685781 | -0.956575 | -0.899891 | 0 |
| 16 | 1.49408 | -1.42002 | -1.6302 | 1.22245 | 0.947252 | 0.439392 | 0 | -0.472325 | 0.227851 | 0.361896 | 0.524599 | -0.0312749 | 0.129242 | 1 |
| 17 | -0.205158 | -1.70627 | 0.462782 | 0.208275 | -0.15501 | 0.166673 | 1 | 1.93666 | 0.703789 | 0.467568 | -0.793387 | 1.03272 | 0.979693 | 1 |
| 18 | 0.313068 | 1.95078 | -0.907298 | 0.976639 | 0.614079 | 0.635031 | 0 | 1.47734 | -0.7978 | -1.51803 | -0.237881 | -1.21562 | 0.328375 | 0 |
| 19 | -0.854096 | -0.509652 | 0.0519454 | 0.356366 | 0.922207 | 2.38314 | 0 | -0.0848901 | -0.6759 | -1.89304 | 0.569498 | -0.318678 | 0.487074 | 0 |
| 20 | -2.55299 | -0.438074 | 0.729091 | 0.706573 | 0.376426 | 0.944479 | 1 | 0.427697 | -0.922546 | -0.785087 | -1.51061 | 1.49513 | 0.144842 | 1 |
| 21 | 0.653619 | -1.2528 | 0.128983 | 0.0105 | -1.0994 | -0.912822 | 1 | -0.30428 | -0.448586 | -1.60529 | -1.56505 | -0.130251 | -0.0856099 | 1 |
| 22 | 0.864436 | 0.77749 | 1.1394 | 1.78587 | 0.298238 | 1.11702 | 1 | 0.204625 | 0.181979 | 1.43184 | -3.05123 | -1.20289 | 0.71054 | 1 |
| 23 | -0.742165 | -1.6139 | -1.23483 | 0.126912 | 1.32639 | -1.31591 | 1 | -0.0833382 | -0.220084 | -1.94219 | 1.55966 | 0.199565 | 0.93096 | 0 |
| 24 | 2.26975 | -0.21274 | 0.402342 | 0.401989 | -0.694568 | -0.461585 | 1 | 1.82893 | 0.0249562 | 1.13995 | -2.63101 | 0.393166 | 0.875074 | 0 |
Shape of X --> (50, 1, 6) Shape of labels --> (50,)
预处理你的数据后，你可以像这样创建一个LSTM模型，其中维度timesteps代表1秒：
timesteps, features = X.shape[1], X.shape[2]
input = tf.keras.layers.Input(shape=(timesteps, features))
x = tf.keras.layers.LSTM(32, return_sequences=False)(input)
output = tf.keras.layers.Dense(1, activation='sigmoid')(x)
model = tf.keras.Model(input, output)
model.compile(optimizer='adam', loss=tf.keras.losses.BinaryCrossentropy())
print(model.summary())
model.fit(X, Y, batch_size=10, epochs=5)
Model: "model_1"
_________________________________________________________________
Layer (type) Output Shape Param #
=================================================================
input_16 (InputLayer) [(None, 1, 6)] 0
lstm_1 (LSTM) (None, 32) 4992
dense_21 (Dense) (None, 1) 33
=================================================================
Total params: 5,025
Trainable params: 5,025
Non-trainable params: 0
_________________________________________________________________
None
Epoch 1/5
5/5 [==============================] - 2s 4ms/step - loss: 0.6914
Epoch 2/5
5/5 [==============================] - 0s 3ms/step - loss: 0.6852
Epoch 3/5
5/5 [==============================] - 0s 3ms/step - loss: 0.6806
Epoch 4/5
5/5 [==============================] - 0s 4ms/step - loss: 0.6758
Epoch 5/5
5/5 [==============================] - 0s 4ms/step - loss: 0.6705
<keras.callbacks.History at 0x7f90ca6c6d90>
您还可以在使用 MinMaxScaler 或 StandardScaler 将数据输入模型之前对其进行缩放/规范化，但我将由您来决定。
【讨论】：