How to create a grouped bar chart (by month and year) on the x-axis and values on the y-axis using matplotlib.pyplot?

Question

This is my dataframe:

   Year  Month    Views
0  2016      5    97162
1  2016      6   415627
2  2016      7   675071
3  2016      8   962525
4  2016      9  1244306

I want the views to be plotted on the y-axis, and on the x-axis I want the months and years like this: . How can I visualize my dataframe like the above figure using matplotlib.pyplot?

score 1 · Accepted Answer · answered Sep 22 '20 at 07:07

1

Use with DataFrame.pivot with DataFrame.plot.bar:

df.pivot('Year','Month','Views').plot.bar()

If need month names add rename after pivoting:

month_dict = {1 : "January", 2 : "February", 3 : "March", 4 : "April", 
              5 : "May" , 6 : "June", 7 : "July", 8 : "August", 
              9 : "September", 10 : "October" ,11 : "November",12 : "December"}

df.pivot('Year','Month','Views').rename(columns=month_dict).plot.bar()

answered Sep 22 '20 at 07:07

jezrael

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Great answer!! How do I get rid of the scientific notation on the y-axis though? – tryingtobeastoic Sep 22 '20 at 07:14
1

@AbuSafwanMdfarhan - Can you heck [this](https://stackoverflow.com/questions/28371674/prevent-scientific-notation-in-matplotlib-pyplot) ? – jezrael Sep 22 '20 at 07:19

score 1 · Answer 2 · answered Sep 22 '20 at 07:12

You can simply use seaborn instead. It's nicer in coloring, and easier to use, most of the times.

For example:

import pandas as pd
import seaborn as sns

df = pd.DataFrame({"year": [1,1,1,1,2,3,2,3,2,3],
                   "month": [4, 6, 7, 5, 4, 6, 7, 1, 1, 4],
                   "value": list(range(5,15))})


sns.barplot(data=df, y='value', x='year', hue='month')

The output is as follows:

How to create a grouped bar chart (by month and year) on the x-axis and values on the y-axis using matplotlib.pyplot?

2 Answers2