# Basic Lollipop Plot

This post aims to explain how to draw a basic lollipop plot with matplotlib.

A basic lollipop plot can be created using the `stem()` function of matplotlib. This function takes x axis and y axis values as an argument. x values are optional; if you do not provide x values, it will automatically assign x positions.

``````# libraries
import matplotlib.pyplot as plt
import numpy as np

# create data
x=range(1,41)
values=np.random.uniform(size=40)

# stem function
plt.stem(x, values)
plt.ylim(0, 1.2)
plt.show()

# stem function: If x is not provided, a sequence of numbers is created by python:
plt.stem(values)
plt.show()``````

If you have one numerical and one categorical variable, you can still draw a lollipop plot. In this case, it will be similar to a barplot. Ordering your groups and displaying the plot horizontally will give you a better looking chart. The `stem()` function does not allow to make it horizontal, so you can use the `hline()` and the `plot()` functions for this purpose as follow.

``````# libraries
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

# Create a dataframe
df = pd.DataFrame({'group':list(map(chr, range(65, 85))), 'values':np.random.uniform(size=20) })

# Reorder it based on the values:
ordered_df = df.sort_values(by='values')
my_range=range(1,len(df.index)+1)

# Make the plot
plt.stem(ordered_df['values'])
plt.xticks( my_range, ordered_df['group'])
plt.show()

# Horizontal version
plt.hlines(y=my_range, xmin=0, xmax=ordered_df['values'], color='skyblue')
plt.plot(ordered_df['values'], my_range, "D")
plt.yticks(my_range, ordered_df['group'])
plt.show()``````

Barplot

Wordcloud

Parallel

Lollipop

Circular Barplot

## Contact & Edit

👋 This document is a work by Yan Holtz. Any feedback is highly encouraged. You can fill an issue on Github, drop me a message onTwitter, or send an email pasting `yan.holtz.data` with `gmail.com`.

Violin

Density

Histogram

Boxplot

Ridgeline

Scatterplot

Heatmap

Correlogram

Bubble

Connected Scatter

2D Density

Barplot

Wordcloud

Parallel

Lollipop

Circular Barplot

Treemap

Venn Diagram

Donut

Pie Chart

Dendrogram

Circular Packing

Line chart

Area chart

Stacked Area

Streamgraph

Timeseries

Map

Choropleth

Hexbin

Cartogram

Connection

Bubble

Chord Diagram

Network

Sankey

Arc Diagram

Edge Bundling

Colors

Interactivity

Animation

Cheat sheets

Caveats

3D