Your First Real Score — easy Machine Learning in Code problem | Incognition

Your First Real Score

10 pts · 10 coins

Machine Learning in CodeEasy

Your First Real Score

A clinic wants to know how well nearest neighbours tells harmless tissue samples from cancerous ones, using the built-in breast cancer data.

Task: write cancer_test_score(k).

Load the breast cancer data as X and y.
Split it with train_test_split(X, y, test_size=0.25, random_state=0).
Train a KNeighborsClassifier(n_neighbors=k) on the training rows.
Return its score on the test rows, rounded to 3 decimal places.

Examples

k = 5

returns 0.937

k = 1

returns 0.916

Hints

solution.py

1from sklearn.datasets import load_breast_cancer
2from sklearn.model_selection import train_test_split
3from sklearn.neighbors import KNeighborsClassifier
4
5
6def cancer_test_score(k):
7    pass
8