How to Correctly Set Y-Axis Limits in Matplotlib?

Setting Axis Limits in Matplotlib

Question:

Faced with an unsuccessful attempt to set the y-axis limits on a Matplotlib plot, a user seeks guidance on how to achieve the desired limits using the following code:

import matplotlib.pyplot as plt

plt.figure(1, figsize = (8.5,11))
plt.suptitle('plot title')
ax = []
aPlot = plt.subplot(321, axisbg = 'w', title = "Year 1")
ax.append(aPlot)
plt.plot(paramValues,plotDataPrice[0], color = '#340B8C', 
     marker = 'o', ms = 5, mfc = '#EB1717')
plt.xticks(paramValues)
plt.ylabel('Average Price')
plt.xlabel('Mark-up')
plt.grid(True)
plt.ylim((25,250))

Despite setting plt.ylim((25,250)), the y-axis limits default to 20 and 200. How can the limits be adjusted to the intended 20 and 250?

Answer:

To set the axis limits in Matplotlib, one needs to access the current axis using plt.gca(). Once the current axis is obtained, the limits can be set using the set_ylim() method. The following code snippet demonstrates this:

ax = plt.gca()
ax.set_ylim([20, 250])

By implementing this modification, the y-axis limits will be successfully adjusted to the desired 20 and 250.

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