Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

is it a bug?

See original GitHub issue

Description

an err output, In my train_output, it does not exist [0,0]

Steps/Code to Reproduce

from sklearn import tree

X = [[1, 1], [1, 2], [1, 3], [1, 4], [2, 1], [2, 2], [2, 3], [2, 4]]
Y = [[0, 1], [0, 1], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0], [1, 0]]
# Y = [[0], [0], [1], [1], [1], [1], [1], [1]]

clf = tree.DecisionTreeClassifier(criterion='entropy', max_depth=1)
clf.fit(X, Y)
print(clf.predict([[1, 1], [1, 2], [1, 3], [1, 4], [2, 1], [2, 2], [2, 3], [2, 4]]))

Expected Results

[[ 0. 1.] [ 0. 1.] [ 0. 1.] [ 0. 1.] [ 1. 0.] [ 1. 0.] [ 1. 0.] [ 1. 0.]]

Actual Results

[[ 0. 0.] [ 0. 0.] [ 0. 0.] [ 0. 0.] [ 1. 0.] [ 1. 0.] [ 1. 0.] [ 1. 0.]]

Versions

Darwin-16.7.0-x86_64-i386-64bit Python 3.6.1 (v3.6.1:69c0db5050, Mar 21 2017, 01:21:04) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] NumPy 1.13.3 SciPy 0.19.1 Scikit-Learn 0.19.0

Issue Analytics

State:
Created 6 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

1reaction

amuellercommented, Oct 25, 2017

encoding the targets as one-hot indicates to the estimator that you want it treated as a multi-label problem.

0reactions

bringtreecommented, Oct 26, 2017

oh, thanks

Top Results From Across the Web

Identifying a Bug vs Insect - ThoughtCo

Technically, or taxonomically, a bug is a creature that belongs to the insect order Hemiptera, known commonly as the true bugs. Aphids, cicadas, ......

Is It a Feature? Is it a Bug? No, It's an Antifeature.

A bug is a behavior, usually the result of an error or sloppy programming, that gets in the way of the features. Antifeatures,...

What is a bug (computer bug)? - TechTarget

In computer technology, a bug is a coding error in a computer program. (We consider a program to also include the microcode that...

'It's Not a Bug, It's a Feature.' Trite—or Just Right? - WIRED

A standard joke is that a bug can be turned into a feature simply by documenting it (then theoretically no one can complain...

What Makes a Bug a True Bug? - VPM

To them, a true bug refers only to members of Hemiptera, an order of insects that also includes cicadas, hoppers, and aphids.