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Fix error in "Multiclass ROC Curve" #2852

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Oct 21, 2020
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Fix error in "Multiclass ROC Curve" #2852

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10 changes: 6 additions & 4 deletions doc/python/ml-roc-pr.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,8 @@ jupyter:
text_representation:
extension: .md
format_name: markdown
format_version: '1.2'
jupytext_version: 1.4.2
format_version: '1.1'
jupytext_version: 1.1.1
kernelspec:
display_name: Python 3
language: python
Expand Down Expand Up @@ -142,13 +142,15 @@ df.loc[samples.index, 'species'] = samples.values
# Define the inputs and outputs
X = df.drop(columns=['species', 'species_id'])
y = df['species']
y_onehot = pd.get_dummies(y, columns=model.classes_)

# Fit the model
model = LogisticRegression(max_iter=200)
model.fit(X, y)
y_scores = model.predict_proba(X)

# One hot encode the labels in order to plot them
y_onehot = pd.get_dummies(y, columns=model.classes_)

# Create an empty figure, and iteratively add new lines
# every time we compute a new class
fig = go.Figure()
Expand Down Expand Up @@ -272,4 +274,4 @@ fig.show()
Learn more about `px`, `px.area`, `px.hist`:
* https://plot.ly/python/histograms/
* https://plot.ly/python/filled-area-plots/
* https://plot.ly/python/line-charts/
* https://plot.ly/python/line-charts/