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I would like to know if someone knows of an easy way to make an OLS trendline in ploty express pass through the origin. I have been looking for quite some time now so it would be much appreciated.

Kh4lid MD
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Joshua Schaafsma
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  • You can remove the constant from the regression formula, so that it looks like `y = a * x`, which passes through the origin, because `a * 0 = 0` – ForceBru Sep 17 '21 at 12:21
  • you would most likely get more responses if you can add a screenshot of what your expected output is. – Gangula Sep 24 '21 at 19:23

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With plotly.express.scatter(), there is a trendline_options variable passed in as a dictionary. Set the add_constant key to False; i.e.

fig = px.scatter(df, x=x, y=y, trendline="ols", trendline_options={"add_constant": False})
neelsnarayan
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