python - Matplotlib yaxis范围显示使用绝对值而不是偏移值？

Question

我有以下范围的 numpy 数据(usec 时间戳的增量):

array([ 4.312,  4.317,  4.316,  4.32 ,  4.316,  4.316,  4.319,  4.317,
    4.317,  4.316,  4.318,  4.316,  4.318,  4.316,  4.318,  4.317,
    4.317,  4.317,  4.316,  4.317,  4.318,  4.316,  4.318,  4.316,
    4.318,  4.316,  4.317,  4.317,  4.318,  4.316,  4.317,  4.317,
    4.317,  4.317,  4.317,  4.316,  4.319,  4.315,  4.319,  4.315,
    4.319,  4.315,  4.316,  4.319,  4.317,  4.317,  4.317,  4.318,
    4.315,  4.317,  4.317,  4.317,  4.319,  4.314,  4.32 ,  4.315,
    4.317,  4.318,  4.315,  4.318,  4.317,  4.317,  4.317,  4.316,
    4.317,  4.318,  4.317,  4.317,  4.317,  4.315,  4.319,  4.317,
    4.315,  4.319,  4.316,  4.318,  4.318,  4.315,  4.318,  4.317,
    4.317,  4.321])

当我使用 matplotlib.pyplot 绘图时:

 import matplotlib.pyplot as plt
 plt.plot( deltas ) 
 plt.show()

我得到以下情节。为什么 Y 轴会这样缩放？如何将 Y 轴标记为数据，而不是数据的偏移量？有时情节是“+4.nnn”，有时不是(取决于数据范围？)。

“奇怪地”绘制:

“正确”绘制:

Answer 1

将 useOffset 设置为 False:

ax = plt.gca()
ax.ticklabel_format(useOffset=False)