# DBSCAN Clustering

## Preliminaries

# Load libraries from sklearn import datasets from sklearn.preprocessing import StandardScaler from sklearn.cluster import DBSCAN

## Load Iris Flower Dataset

# Load data iris = datasets.load_iris() X = iris.data

## Standardize Features

# Standarize features scaler = StandardScaler() X_std = scaler.fit_transform(X)

## Conduct Meanshift Clustering

`DBSCAN`

has three main parameters to set:

`eps`

: The maximum distance from an observation for another observation to be considered its neighbor.`min_samples`

: The minimum number of observation less than`eps`

distance from an observation for to be considered a core observation.`metric`

: The distance metric used by`eps`

. For example,`minkowski`

,`euclidean`

, etc. (note that if Minkowski distance is used, the parameter`p`

can be used to set the power of the Minkowski metric)

If we look at the clusters in our training data we can see two clusters have been identified, `0`

and `1`

, while outlier observations are labeled `-1`

.

# Create meanshift object clt = DBSCAN(n_jobs=-1) # Train model model = clt.fit(X_std)