Syntax error How to set the line color in Python Plotly?

How to set the line color in Python Plotly?

Python Plotly has features that you can use to set the line color in a graph. In this tutorial, let us understand how to set the line color in Plotly.

Here, we will use plotly.express to generate the figures. It contains a lot of methods to customize the charts and render a chart in HTML format.

To set the line color, we will use the update_traces() method and set line_color with color values.

Follow the steps given below to set the line color.

Step 1

Import plotly.express module and alias as px.

import plotly.express as px

Step 2

Create a dataframe as shown below ?

import pandas as pd
data = {'mark':[12,13,11,14,15], 'avg':[5,6,5,7,8]}
df = pd.DataFrame(data)

Step 3

Create a line plot with the following coordinates ?

fig = px.line(df, df['mark'], df['avg'])

Step 4

Use the update_traces() method to set line color as "purple". Similarly, you can assign other different colors as well.

fig.update_traces(line_color='purple')

Example

Here is the complete code to set the line color in Python Plotly ?

import plotly.express as px
import pandas as pd

data = {'mark':[12,13,11,14,15], 'avg':[5,6,5,7,8]}
df = pd.DataFrame(data)

fig = px.line(df, df['mark'], df['avg'])
fig = px.scatter(width=716, height=400)
fig.update_traces(line_color='purple')

fig.show()

Output

It will show the following output on the browser ?


Observe that here we have used the line_color attribute of the update_traces() method to set the line color as "purple". You can choose other colors too and also, you can use the line_width attribute to set the width of a line on the graph.

Updated on: 2022-10-07T10:59:34+05:30

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