我无法弄清楚如何在Python中为散点图散布y轴上的空间

Question

I entered this code with the x , y , and size defined by variables I created earlier. The problem is that the points are too bunched up and I want to stretch out my y-axis.

plt.scatter(rets.mean(),rets.std(),s = area)
plt.xlabel('Expected Return')
plt.ylabel('Risk')

For example, right now my y-axis goes from -0.005 to 0.04 in increments of 0.005 , how would I adjust it to count in increments of 0.0025 ?

Answer 1

import matplotlib.pyplot as plt
import matplotlib.ticker as mticks

fig, ax = plt.subplots()

ax.set_ylim((-.005, .04))
ax.yaxis.set_major_locator(mticks.MultipleLocator(.0025))