Python Plotly: How to set the range of the y axis?

In this article, we will learn how to set the range of the y-axis of a graph using plotly in Python.

To install this module type the below command in the terminal:

pip install plotly

Example 1: Using layout_yaxis_range as a parameter 

In this example, we have first import the required libraries i.e pandas,numpy and plotly.objs, then we generated some list of numbers of plotting on the x-axis and y-axis, Further, we have used go.Scatter() function to make a scatter plot. The go.Figure() function takes in data as input where we set the mode as ‘lines’ using mode=’lines’.We have used the magic underscore notation i.e layout_yaxis_range=[-8,8] to set the y-axis range from -8 to 8. At last we display the figure using the show() function.

Python3

# Importing Libraries
import pandas as pd
import plotly.graph_objs as go
import numpy as np

# generating numbers ranging from 1 to 20
# on x-axis
x = list(range(1,20))

# generating random numbers on y-axis
y = np.random.randn(20)

# plotting scatter plot on x and y data with 'lines'
# as mode and setting the y-axis range from -8 to 8
fig = go.Figure(data=go.Scatter(x=x, y=y, mode='lines'),
                layout_yaxis_range=[-8,8])

# to display the figure in the output screen
fig.show()

Output:

Example 2: Using update_layout() function to set the y-axis range later

In the following example, Here we have built the plot without setting the y-axis range at first.Further, we set the y-axis range using update_layout() function i.e fig.update_layout(yaxis_range=[-3,3]) to set the range from -3 to 3.

Python3

# Importing Libraries
import pandas as pd
import plotly.graph_objs as go
import numpy as np

np.random.seed(5)

# generating numbers ranging from 1 to 20
# on x-axis
x = list(range(1,20))

# generating random numbers on y-axis
y = np.random.randn(20)

# plotting scatter plot on x and y data with
# 'lines' as mode
fig = go.Figure(data=go.Scatter(x=x, y=y, mode='lines'))

# setting the y-axis range from -3 to 3
fig.update_layout(yaxis_range=[-3,3])

# to display the figure in the output screen
fig.show()

Output:

Example 3:

Similarly here we passed dict(range=[-4,4]) as a dictionary of numbers to parameter yaxis inside update_layout() function.

Python3

# Importing Libraries
import numpy as np
import pandas as pd
import plotly.graph_objs as go

np.random.seed(5)

# generating numbers ranging from 1 to 20
# on x-axis
x = list(range(1,20))

# generating random numbers on y-axis
y = np.random.randn(20)

# plotting scatter plot on x and y data with
# 'lines' as mode
fig = go.Figure(data=go.Scatter(x=x, y=y, mode='lines'))

# and setting the y-axis range from -4 to 4
fig.update_layout(yaxis=dict(range=[-4,4]))

# to display the figure in the output screen
fig.show()

Output: