Random forest classification

We want to classify the Iris dataset using a Random Forest classifier.

Import

from __future__ import annotations

from numpy import array

from gemseo import configure_logger
from gemseo import create_benchmark_dataset
from gemseo.mlearning import create_classification_model

configure_logger()

<RootLogger root (INFO)>

Load Iris dataset

iris = create_benchmark_dataset("IrisDataset", as_io=True)

Create the classification model

Then, we build the linear regression model from the discipline cache and displays this model.

model = create_classification_model("RandomForestClassifier", data=iris)
model.learn()
model

RandomForestClassifier(n_estimators=100, random_state=0)

• based on the scikit-learn library
• built from 150 learning samples

Predict output

Once it is built, we can use it for prediction.

input_value = {
    "sepal_length": array([4.5]),
    "sepal_width": array([3.0]),
    "petal_length": array([1.0]),
    "petal_width": array([0.2]),
}
output_value = model.predict(input_value)
output_value

{'specy': array([0])}