Matplotlib:为多个twinx()轴着色 [英] Matplotlib: Colour multiple twinx() axes

问题描述

我目前正在Sage中使用matplotlib绘制一些数据.我可以使用以下示例添加多个y轴:

I'm currently using matplotlib within Sage to plot some data. I have made it possible to add multiple y axes using this example:

from mpl_toolkits.axes_grid1 import host_subplot
import mpl_toolkits.axisartist as AA
import matplotlib.pyplot as plt

if 1:

    host = host_subplot(111, axes_class=AA.Axes)
    plt.subplots_adjust(right=0.75)

    par1 = host.twinx()
    par2 = host.twinx()

    offset = 60
    new_fixed_axis = par2.get_grid_helper().new_fixed_axis
    par2.axis["right"] = new_fixed_axis(loc="right",
                                        axes=par2,
                                        offset=(offset, 0))

    par2.axis["right"].toggle(all=True)



    host.set_xlim(0, 2)
    host.set_ylim(0, 2)

    host.set_xlabel("Distance")
    host.set_ylabel("Density")
    par1.set_ylabel("Temperature")
    par2.set_ylabel("Velocity")

    p1, = host.plot([0, 1, 2], [0, 1, 2], label="Density")
    p2, = par1.plot([0, 1, 2], [0, 3, 2], label="Temperature")
    p3, = par2.plot([0, 1, 2], [50, 30, 15], label="Velocity")

    par1.set_ylim(0, 4)
    par2.set_ylim(1, 65)

    host.legend()

    host.axis["left"].label.set_color(p1.get_color())
    par1.axis["right"].label.set_color(p2.get_color())
    par2.axis["right"].label.set_color(p3.get_color())

    plt.draw()
    plt.show()

    #plt.savefig("Test")

来源: http://matplotlib.org/examples/axes_grid/demo_parasite_axes2.html

但是，可以更改寄生虫轴的颜色吗?我在某处读到该方法与原始twinx()不太兼容，因此可能会使事情复杂化.

However, is it possible to change the colour of the parasite axes? I read somewhere that this method is not very compatible with the original twinx() so that may be complicating things.

推荐答案

虽然通常可以节省几行代码，但不必使用AA类.我不确定您要精确着色的颜色，因为轴包含许多可以具有颜色的项目，例如刺，标签，壁虱标签等.

Its not necessary to use the AA class, although normally that would save you a few lines of code. I'm not sure what exactly you want to color since the axes consists of many items which can have a color like spines, label, ticklabels etc.

此示例显示了如何对其进行大部分着色，其几乎与在画廊中着色的.

This example shows how to color most of it, its almost identical to the one in the gallery.

import matplotlib.pyplot as plt

fig, host = plt.subplots()
fig.subplots_adjust(right=0.75)

par1 = host.twinx()
par2 = host.twinx()

# move the spine of the second axes outwards
par2.spines["right"].set_position(("axes", 1.2))

p1, = host.plot([0, 1, 2], [0, 1, 2], 'r-', label="Density")
p2, = par1.plot([0, 1, 2], [0, 3, 2], 'g-', label="Temperature")
p3, = par2.plot([0, 1, 2], [50, 30, 15], 'b-', label="Velocity")

host.set_xlim(0, 2)
host.set_ylim(0, 2)
par1.set_ylim(0, 4)
par2.set_ylim(1, 65)

host.set_xlabel("Distance")
host.set_ylabel("Density")
par1.set_ylabel("Temperature")
par2.set_ylabel("Velocity")

lines = [p1, p2, p3]
host.legend(lines, [l.get_label() for l in lines])

for ax in [par1, par2]:
    ax.set_frame_on(True)
    ax.patch.set_visible(False)

    plt.setp(ax.spines.values(), visible=False)
    ax.spines["right"].set_visible(True)

host.yaxis.label.set_color(p1.get_color())
par1.yaxis.label.set_color(p2.get_color())
par2.yaxis.label.set_color(p3.get_color())

par1.spines["right"].set_edgecolor(p2.get_color())
par2.spines["right"].set_edgecolor(p3.get_color())

host.tick_params(axis='y', colors=p1.get_color())
par1.tick_params(axis='y', colors=p2.get_color())
par2.tick_params(axis='y', colors=p3.get_color())

这篇关于Matplotlib:为多个twinx()轴着色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！