setting y-axis limit in matplotlib

Question

I need help with setting the limits of y-axis on matplotlib. Here is the code that I tried, unsuccessfully.

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))

With the data I have for this plot, I get y-axis limits of 20 and 200. However, I want the limits 20 and 250.

Answer 1

For setting the limits of the y-axis on matplotlib you can use the following code which will work for subplots as well:-

axes = plt.gca()

axes.set_xlim([xmin,xmax])

axes.set_ylim([ymin,ymax])

Another way you can do this problem by changing only the y-values:

x1,x2,y1,y2 = plt.axis()

plt.axis((x1,x2,25,250))