How to Fit a Trendline in a Scatter Plot in Plotly(default and your own line)

Creating trendlines with Plotly is super easy, but it seems there is no function provided for creating trendlines in multi-plots/subplots. We can just create our own linear regression model to calculate the trendline and plot it.

1. Plot the trendline using Plotly’s function
2. Creating our own trendline

1. Plot the trendline using Plotly’s function

This is easy, document link is here

import plotly.express as px
df = px.data.tips()
fig = px.scatter(df, x="total_bill", y="tip", facet_col="smoker", color="sex", trendline="ols")
fig.show()
results = px.get_trendline_results(fig)
print(results)
results.query("sex == 'Male' and smoker == 'Yes'").px_fit_results.iloc[0].summary()

Trendline Created

The line in detail

2. Creating our own trendline

from sklearn import preprocessing
from plotly.subplots import make_subplots
fig = make_subplots(rows=2…