+1)取出iris+的sepal+length列2)+取出iris+的sepal+length列+和+petal+length列。3)+取出iris+中target为0的所有行。4)+取出iris中
时间: 2023-10-05 12:08:08 浏览: 47
回答:
1) 取出iris的sepal length列的代码如下:
```
import pandas as pd
from sklearn.datasets import load_iris
iris = load_iris()
df = pd.DataFrame(data=iris.data, columns=iris.feature_names)
sepal_length = df['sepal length (cm)']
```
2) 取出iris的sepal length列和petal length列的代码如下:
```
import pandas as pd
from sklearn.datasets import load_iris
iris = load_iris()
df = pd.DataFrame(data=iris.data, columns=iris.feature_names)
sepal_petal_length = df[['sepal length (cm)', 'petal length (cm)']]
```
3) 取出iris中target为0的所有行的代码如下:
```
import pandas as pd
from sklearn.datasets import load_iris
iris = load_iris()
df = pd.DataFrame(data=iris.data, columns=iris.feature_names)
target_0_rows = df[df['target'] == 0]
```
4) 取出iris中target为0的所有行的代码如下(修改后):
```
import pandas as pd
from sklearn.datasets import load_iris
iris = load_iris()
df = pd.DataFrame(data=iris.data, columns=iris.feature_names)
target_0_rows = df[df['target'] == 0]
```
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