Python Matplotlib - 如何在 y 轴上指定值？
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Python Matplotlib - how to specify values on y axis?
提问by Crista23
I am new to Python and I need to generate a graph using pyplot and matplotlib like the one in the attached picture. So far I tried it like this:
我是 Python 新手，我需要使用 pyplot 和 matplotlib 生成一个图表，就像附图中的那个一样。到目前为止，我是这样尝试的：
import matplotlib.pyplot as plt
import numpy as np
x = np.array([0,1,2,3])
y = np.array([20,21,22,23])
my_xticks = ['John','Arnold','Mavis','Matt']
plt.xticks(x, my_xticks)
plt.plot(x, y)
plt.show()
But my problem is how can I specify a different number of values on the y axis different from the number of values on the x axis? And maybe specify them as an interval with 0.005 difference instead of a list? Many thanks! 
但我的问题是如何在 y 轴上指定不同数量的值与 x 轴上的值数量不同？并且可能将它们指定为具有 0.005 差异的间隔而不是列表？非常感谢！
采纳答案by M4rtini
import matplotlib.pyplot as plt
import numpy as np
x = np.array([0,1,2,3])
y = np.array([0.650, 0.660, 0.675, 0.685])
my_xticks = ['a', 'b', 'c', 'd']
plt.xticks(x, my_xticks)
plt.yticks(np.arange(y.min(), y.max(), 0.005))
plt.plot(x, y)
plt.grid(axis='y', linestyle='-')
plt.show()
Something like this should work.
像这样的事情应该有效。
