CODEWITHSUNDEEP
pythonplotplotly
Zero
Zero

Reputation: 1899

How to plot a scatter plot and a line plot on the same graph using Plotly in Python?

I've recently gotten into plotly and am absolutely loving it, so am trying to use it in each project I do.

With matplotlib I can plot a line plot and a scatter plot on the same graph using the code below.

plt.figure(figsize = (20,5))
plt.scatter(x, y)
plt.plot(x, y_pred, color = "r")
plt.show()

Using the trendline parameter in the scatter function inside plotly.express I can plot a line of best fit through the scattered points, but I don't want that as I am trying to demonstrate how to calculate that line.

Thanks for the help in advance!

Upvotes: 0

Views: 3645

Answers (3)

wysteria
wysteria

Reputation: 1

If you create a line plot instead, you can actually use the markers arument:

px.line(x=x, y=y, markers=True)

https://i.sstatic.net/aJaaM.png

https://plotly.com/python-api-reference/generated/plotly.express.line.html

Upvotes: 0

Rob Raymond
Rob Raymond

Reputation: 31146

Using same defined arrays / lists, x, y, y_pred. An equivalent approach is to use Plotly Express to create a figure then add additional traces to it.

import pandas as pd
import numpy as np
import plotly.express as px

x = np.linspace(1, 20, 16)
y = np.random.uniform(1, 6, 16)
y_pred = y * 1.1

fig = px.scatter(x=x, y=y, color_discrete_sequence=["yellow"])
fig.add_traces(px.line(x=x, y=y_pred, color_discrete_sequence=["red"]).data)

enter image description here

Upvotes: 1

Michel Kok
Michel Kok

Reputation: 398

You can use fig.add_shape after you have created the scatter plot like so:

fig.add_shape(
    type="line",
    x0=0,
    y0=0,
    x1=10,
    y1=10,
    line=dict(width=1, dash="dash"),
)

Upvotes: 0

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