How to plot two plots with strings as x axis values

Question

I want to plot two figures in one image using matplotlib. Data which I want to plot is:

x1 = ['sale','pseudo','test_mode']
y1 = [2374064, 515, 13]

x2 = ['ready','void']
y2 = [2373078, 1514]

I want to plot the bar plot for both the figure in one image. I used the code given below:

f, (ax1, ax2) = plt.subplots(1, 2, sharey=True)
ax1.plot(x1, y1)
ax1.set_title('Two plots')
ax2.plot(x2, y2)

but its giving error:

ValueError: could not convert string to float: PSEUDO

How I can plot them in one image using matplotlib?

malugina · Accepted Answer · 2017-08-12 19:49:58Z

1

Try this:

x1 = ['sale','pseudo','test_mode']
y1 = [23, 51, 13]

x2 = ['ready','void']
y2 = [78, 1514]

y = y1+y2
x = x1+x2
pos = np.arange(len(y))
plt.bar(pos,y)
ticks = plt.xticks(pos, x)

Separate figures in one image:

x1 = ['sale','pseudo','test_mode']
y1 = [23, 51, 13]

x2 = ['ready','void']
y2 = [78, 1514]

fig, (ax1, ax2) = plt.subplots(1, 2, sharey=True)

pos1 = np.arange(len(y1))
ax1.bar(pos1,y1)
plt.sca(ax1)
plt.xticks(pos1,x1)

pos2 = np.arange(len(y2))
ax2.bar(pos,y2)
plt.sca(ax2)
plt.xticks(pos2,x2)

edited Aug 12, 2017 at 19:49

answered Aug 11, 2017 at 10:34

malugina

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1 Comment

neha Over a year ago

I can't draw like this. x1 and x2 are two different attributes. From your solution it will get plot as a one attribute. I want to make to separate figures for x1 and x2. Separate figure in one image.

pingul · Accepted Answer · 2017-08-15 08:06:53Z

0

The problem is that your x values are not numbers, but text. Instead, plot the y values and then change the name of the xticks (see this answer):

import matplotlib.pyplot as plt

x1 = ['sale','pseudo','test_mode']
y1 = [23, 51, 13]

x2 = ['ready','void']
y2 = [78, 1514]

f, axes = plt.subplots(1, 2, sharey=True)
for (x, y, ax) in zip((x1, x2), (y1, y2), axes):
    ax.plot(y)
    ax.set_xticks(range(len(x))) # make sure there is only 1 tick per value
    ax.set_xticklabels(x)
plt.show()

This produces:

For a bar graph, switch out ax.plot(y) with ax.bar(range(len(x)), y). This will produce the following:

edited Aug 15, 2017 at 8:06

answered Aug 11, 2017 at 10:13

pingul

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4 Comments

neha Over a year ago

It's giving error AttributeError: 'AxesSubplot' object has no attribute 'xticks'

pingul Over a year ago

@neha I was in a hurry, and did not have time to verify the code. I've updated the example.

neha Over a year ago

Did you know how I can plot the bar plot of this two diagrams?

pingul Over a year ago

@neha I added a bar graph as well. Consider accepting this answer if it solves your problem.

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