CODEWITHSUNDEEP
matplotlib
Muamar Jasim
Muamar Jasim

Reputation: 35

Matplotlib development app problem in yticks()

i have this code in python, its not change coordinate y , plt.yticks instruction not change, any help?

import matplotlib.pyplot as plt
year = [1927, 1934, 1947, 1957, 1965, 1977, 1987, 1997]
population = [2968540, 3213174, 4816185, 6536109, 8261527, 12497000,16635199,19184543]

plt.plot(year,population,color="red")

plt.title("Iraq Population 1927-1997")
plt.xlabel('Year')
plt.ylabel("Population")


plt.yticks([0, 4, 8, 12, 16, 20], ["0m", "4m", "8m", "12m", "16m", "20m"])

plt.grid()
plt.show()

Upvotes: 0

Views: 104

Answers (2)

ImportanceOfBeingErnest
ImportanceOfBeingErnest

Reputation: 339470

This is the typical usecase of a matplotlib.ticker.EngFormatter.

import matplotlib.pyplot as plt
from matplotlib.ticker import EngFormatter

year = [1927, 1934, 1947, 1957, 1965, 1977, 1987, 1997]
population = [2968540, 3213174, 4816185, 6536109, 8261527, 12497000,16635199,19184543]

plt.plot(year,population,color="red")

plt.title("Iraq Population 1927-1997")
plt.xlabel('Year')
plt.ylabel("Population")

plt.gca().yaxis.set_major_formatter(EngFormatter())

plt.grid()
plt.show()

enter image description here

Note that EngFormatter uses a capital M for million, as this is the standard in the SI system.

Upvotes: 1

SpghttCd
SpghttCd

Reputation: 10880

You have millions of people on the y-axis but want ticks at 0, 4, 8, 12, 16 and 20.

I suggest to try

plt.yticks([0e6, 4e6, 8e6, 12e6, 16e6, 20e6], ["0m", "4m", "8m", "12m", "16m", "20m"])

Upvotes: 2

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