matplotlib获取ylim值

问题描述

我正在使用matplotlib从Python绘制数据(使用plot和errorbar函数).我必须绘制一组完全独立的图，然后调整它们的ylim值，以便可以在视觉上轻松进行比较.

I'm using matplotlib to plot data (using plot and errorbar functions) from Python. I have to plot a set of totally separate and independent plots, and then adjust their ylim values so they can be easily visually compared.

如何从每个图上检索ylim值，以便分别取下和上ylim值的最小值和最大值，并调整图以进行直观比较?

How can I retrieve the ylim values from each plot, so that I can take the min and max of the lower and upper ylim values, respectively, and adjust the plots so they can be visually compared?

当然，我可以分析数据并提出自己的自定义ylim值...但是我想使用matplotlib替我做.关于如何轻松(高效)做到这一点的任何建议?

Of course, I could just analyze the data and come up with my own custom ylim values... but I'd like to use matplotlib to do that for me. Any suggestions on how to easily (and efficiently) do this?

这是我的Python函数，它使用matplotlib进行绘制:

Here's my Python function that plots using matplotlib:

import matplotlib.pyplot as plt

def myplotfunction(title, values, errors, plot_file_name):

    # plot errorbars
    indices = range(0, len(values))
    fig = plt.figure()
    plt.errorbar(tuple(indices), tuple(values), tuple(errors), marker='.')

    # axes
    axes = plt.gca()
    axes.set_xlim([-0.5, len(values) - 0.5])
    axes.set_xlabel('My x-axis title')
    axes.set_ylabel('My y-axis title')

    # title
    plt.title(title)

    # save as file
    plt.savefig(plot_file_name)

    # close figure
    plt.close(fig)

推荐答案

只需使用axes.get_ylim()，它与set_ylim非常相似.从文档:

Just use axes.get_ylim(), it is very similar to set_ylim. From the docs:

获取y轴范围[底部，顶部]

Get the y-axis range [bottom, top]

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