How to plot multiple horizontal bars in one chart with matplotlib
Solution 1
It sounds like you want something very similar to this example: http://matplotlib.org/examples/api/barchart_demo.html
As a start:
import pandas
import matplotlib.pyplot as plt
import numpy as np
df = pandas.DataFrame(dict(graph=['Item one', 'Item two', 'Item three'],
n=[3, 5, 2], m=[6, 1, 3]))
ind = np.arange(len(df))
width = 0.4
fig, ax = plt.subplots()
ax.barh(ind, df.n, width, color='red', label='N')
ax.barh(ind + width, df.m, width, color='green', label='M')
ax.set(yticks=ind + width, yticklabels=df.graph, ylim=[2*width - 1, len(df)])
ax.legend()
plt.show()
Solution 2
The question and answers are a bit old now. Based on the documentation this is much simpler now.
>>> speed = [0.1, 17.5, 40, 48, 52, 69, 88]
>>> lifespan = [2, 8, 70, 1.5, 25, 12, 28]
>>> index = ['snail', 'pig', 'elephant',
... 'rabbit', 'giraffe', 'coyote', 'horse']
>>> df = pd.DataFrame({'speed': speed,
... 'lifespan': lifespan}, index=index)
>>> ax = df.plot.barh()
clstaudt
Updated on July 12, 2022Comments
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clstaudt almost 2 years
Can you help me figure out how to draw this kind of plot with matplotlib?
I have a pandas data frame object representing the table:
Graph n m <string> <int> <int>
I want to visualize the size of
n
andm
for eachGraph
: A horizontal bar chart where for each row, there is a label containing theGraph
name to the left of the y-axis; to the right of the y-axis, there are two thin horizontal bars directly below each other, whose length representsn
andm
. It should be clear to see that both thin bars belong to the row labelled with the graph name.This is the code I have written so far:
fig = plt.figure() ax = gca() ax.set_xscale("log") labels = graphInfo["Graph"] nData = graphInfo["n"] mData = graphInfo["m"] xlocations = range(len(mData)) barh(xlocations, mData) barh(xlocations, nData) title("Graphs") gca().get_xaxis().tick_bottom() gca().get_yaxis().tick_left() plt.show()
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Marta over 3 yearsDo you know how to add labels to such chart, I mean specific values for "speed" and "lifespan" for each animal?
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crazy8 about 2 years@Marta you can user matplotlib.pyplot.bar_label now