# Adding Interaction Terms

## Preliminaries

```
/* Load libraries */
from sklearn.linear_model import LinearRegression
from sklearn.datasets import load_boston
from sklearn.preprocessing import PolynomialFeatures
import warnings
/* Suppress Warning */
warnings.filterwarnings(action="ignore", module="scipy", message="^internal gelsd")
```

## Load Boston Housing Dataset

```
/* Load the data with only two features */
boston = load_boston()
X = boston.data[:,0:2]
y = boston.target
```

## Add Interaction Term

```
/* Create interaction term (not polynomial features) */
interaction = PolynomialFeatures(degree=3, include_bias=False, interaction_only=True)
X_inter = interaction.fit_transform(X)
```

## Fit Linear Regression

```
/* Create linear regression */
regr = LinearRegression()
/* Fit the linear regression */
model = regr.fit(X_inter, y)
```

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