import tensorflow as tf import pandas as pd import numpy as np # 读取训练数据,名为"public.train.csv"的CSV文件,并将其转换为一个二维数组datatrain。 df = pd.read_csv(r"public.train.csv", header=None) datatrain = np.array(df) # 从datatrain中提取输入数据和输出数据,其中输入数据是datatrain中的前20列数据,输出数据是datatrain的第21列数据。 # 提取特征值,形成输入数据 dataxs = datatrain[1:, :20] dataxshlen = len(dataxs) # 训练输入数据的行数 dataxsllen = len(dataxs[0]) # 训练输入数据的列数 #接下来,将输入数据中的每个元素从字符串类型转换为浮点型。 for i in range(dataxshlen): for j in range(dataxsllen): dataxs[i][j] = float(dataxs[i][j]) # 提取特征值,形成输出数据 datays = datatrain[1:, [20]] datayshlen = dataxshlen # 训练输出数据的行数 dataysllen = len(datays[0]) # 训练输出数据的列数 #接下来,将输出数据中的每个元素从字符串类型转换为浮点型。 for i in range(datayshlen): for j in range(dataysllen): datays[i][j] = float(datays[i][j]) # 最后打印输出训练数据输入数据、训练数据输出数据以及它们的行数和列数。 print("______训练数据输入数据_______") print(dataxs) print("______训练数据输出数据_______") print(datays) print("______训练数据输入数据行数、列数;训练数据输出数据行数、列数_______") print(dataxshlen, dataxsllen, datayshlen, dataysllen)根据这段代码续写DNN和LSTM预测模型
时间: 2024-02-25 16:56:53 浏览: 133
好的,我可以帮您续写DNN和LSTM预测模型。
DNN预测模型:
首先,我们需要导入必要的库和模块:
```python
import tensorflow as tf
import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import StandardScaler
```
然后,我们将读取并预处理数据:
```python
df = pd.read_csv(r"public.train.csv", header=None)
datatrain = np.array(df)
# 提取特征值,形成输入数据
dataxs = datatrain[1:, :20]
dataxs = dataxs.astype(np.float32)
# 提取特征值,形成输出数据
datays = datatrain[1:, [20]]
datays = datays.astype(np.float32)
# 数据归一化
scaler = StandardScaler()
dataxs = scaler.fit_transform(dataxs)
# 划分训练集和测试集
X_train, X_test, y_train, y_test = train_test_split(dataxs, datays, test_size=0.2, random_state=42)
```
接着,我们定义DNN模型:
```python
model = tf.keras.models.Sequential([
tf.keras.layers.Dense(64, activation='relu', input_shape=(20,)),
tf.keras.layers.Dense(32, activation='relu'),
tf.keras.layers.Dense(1)
])
```
然后,我们编译模型并进行训练:
```python
model.compile(optimizer='adam', loss='mse')
model.fit(X_train, y_train, epochs=50, batch_size=16, validation_data=(X_test, y_test))
```
最后,我们可以使用训练好的模型进行预测:
```python
y_pred = model.predict(X_test)
```
LSTM预测模型:
同样的,我们需要导入必要的库和模块:
```python
import tensorflow as tf
import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import StandardScaler
```
然后,我们将读取并预处理数据:
```python
df = pd.read_csv(r"public.train.csv", header=None)
datatrain = np.array(df)
# 提取特征值,形成输入数据
dataxs = datatrain[1:, :20]
dataxs = dataxs.astype(np.float32)
# 提取特征值,形成输出数据
datays = datatrain[1:, [20]]
datays = datays.astype(np.float32)
# 数据归一化
scaler = StandardScaler()
dataxs = scaler.fit_transform(dataxs)
# 划分训练集和测试集
X_train, X_test, y_train, y_test = train_test_split(dataxs, datays, test_size=0.2, random_state=42)
```
接着,我们需要将输入数据转换为LSTM需要的三维数据格式:
```python
X_train = X_train.reshape((X_train.shape[0], 1, X_train.shape[1]))
X_test = X_test.reshape((X_test.shape[0], 1, X_test.shape[1]))
```
然后,我们定义LSTM模型:
```python
model = tf.keras.models.Sequential([
tf.keras.layers.LSTM(64, input_shape=(1, 20)),
tf.keras.layers.Dense(1)
])
```
然后,我们编译模型并进行训练:
```python
model.compile(optimizer='adam', loss='mse')
model.fit(X_train, y_train, epochs=50, batch_size=16, validation_data=(X_test, y_test))
```
最后,我们可以使用训练好的模型进行预测:
```python
y_pred = model.predict(X_test)
```
阅读全文