Question

我已经调整了这个示例：Matplotlib: Polar plot axis tick label location。我想在从极轴中心到标签标签的标签上的刻度标签（A，B，C，D和E）旁边添加刻度线。另外，我想要一个圆圈结束每一行，直接在标题标题下面（TG01，TG02等）。您将在我的代码示例中看到这些刻度标签和标题标题。在视觉上，这是TG01线的一部分，以展示我正在寻找的东西：

这是我目前的代码：

import numpy as np
import matplotlib.pyplot as plt

class Radar(object):

def __init__(self, fig, titles, label, rect=None):
    if rect is None:
        rect = [0.05, 0.15, 0.95, 0.75]

    self.n = len(titles)
    self.angles = [a if a <=360. else a - 360. for a in np.arange(90, 90+360, 360.0/self.n)]
    self.axes = [fig.add_axes(rect, projection="polar", label="axes%d" % i) 
                    for i in range(self.n)]

    self.ax = self.axes[0]

    # Show the labels
    self.ax.set_thetagrids(self.angles, labels=titles, fontsize=14, weight="bold", color="black")

    for ax in self.axes[1:]:
        ax.patch.set_visible(False)
        ax.grid(False)
        ax.xaxis.set_visible(False)
        self.ax.yaxis.grid(False)

    for ax, angle in zip(self.axes, self.angles):
        ax.set_rgrids(range(1, 6), labels=label, angle=angle, fontsize=12)
        # hide outer spine (circle)
        ax.spines["polar"].set_visible(False)
        ax.set_ylim(0, 6)  
        ax.xaxis.grid(True, color='black', linestyle='-')

def plot(self, values, *args, **kw):
    angle = np.deg2rad(np.r_[self.angles, self.angles[0]])
    values = np.r_[values, values[0]]
    self.ax.plot(angle, values, *args, **kw)

fig = plt.figure(1)

titles = ['TG01', 'TG02', 'TG03', 'TG04', 'TG05', 'TG06']
label = list("ABCDE")

radar = Radar(fig, titles, label)
radar.plot([3.75, 3.25, 3.0, 2.75, 4.25, 3.5], "-", linewidth=2, color="b", alpha=.7, label="Data01")
radar.plot([3.25, 2.25, 2.25, 2.25, 1.5, 1.75],"-", linewidth=2, color="r", alpha=.7, label="Data02")

radar.ax.legend(loc='upper center', bbox_to_anchor=(0.5, -0.10),
  fancybox=True, shadow=True, ncol=4)

plt.show()

目前极地情节如何：

我仔细研究了用ax.xaxis.majorTicks检索的ThetaTick对象。但是，我在ThetaTick对象的属性中没有任何改变，改变了我希望它们呈现的方式。

Answer 1

通过为y轴配置轴刻度参数，我能够获得我想要的大部分内容：

ax.tick_params(axis='y', pad=0, left=True, length=6, width=1, direction='inout')

以及使用decorate_ticks函数的theta tick标签下面的标记装饰（如代码和结果所示）。但是，看起来中心标记始终是最后一个θ网格标记的颜色和样式。我在decorate_ticks函数的注释中注意到了这一点。如果您知道如何以不同方式设置中心标记的样式，请告诉我如何。

import numpy as np
import matplotlib.pyplot as plt

class Radar(object):

  def __init__(self, fig, titles, label, rect=None):
    if rect is None:
        rect = [0.05, 0.15, 0.95, 0.75]

    self.n = len(titles)
    self.angles = [a if a <=360. else a - 360. for a in np.arange(90, 90+360, 360.0/self.n)]
    self.axes = [fig.add_axes(rect, projection="polar", label="axes%d" % i) 
                    for i in range(self.n)]

    self.ax = self.axes[0]

    # Show the labels
    self.ax.set_thetagrids(self.angles, labels=titles, fontsize=14, weight="bold", color="black")

    for ax in self.axes[1:]:
        ax.patch.set_visible(False)
        ax.grid(False)
        ax.xaxis.set_visible(False)
        self.ax.yaxis.grid(False)

    for ax, angle in zip(self.axes, self.angles):
        ax.set_rgrids(range(1, 6), labels=label, angle=angle, fontsize=12)
        # hide outer spine (circle)
        ax.spines["polar"].set_visible(False)
        ax.set_ylim(0, 6)  
        ax.xaxis.grid(True, color='black', linestyle='-')

        # draw a line on the y axis at each label
        ax.tick_params(axis='y', pad=0, left=True, length=6, width=1, direction='inout')

  def decorate_ticks(self, axes):
    for idx, tick in enumerate(axes.xaxis.majorTicks):
        # print(idx, tick.label._text)
        # get the gridline
        gl = tick.gridline
        gl.set_marker('o')
        gl.set_markersize(15)
        if idx == 0:
            gl.set_markerfacecolor('b')
        elif idx == 1:
            gl.set_markerfacecolor('c')
        elif idx == 2:
            gl.set_markerfacecolor('g')
        elif idx == 3:
            gl.set_markerfacecolor('y')
        elif idx == 4:
            gl.set_markerfacecolor('r')
        # this doesn't get used. The center doesn't seem to be different than 5
        else:
            gl.set_markerfacecolor('black')

        if idx == 0 or idx == 3:
            tick.set_pad(10)
        else:
            tick.set_pad(30)

  def plot(self, values, *args, **kw):
    angle = np.deg2rad(np.r_[self.angles, self.angles[0]])
    values = np.r_[values, values[0]]
    self.ax.plot(angle, values, *args, **kw)

fig = plt.figure(1)

titles = ['TG01', 'TG02', 'TG03', 'TG04', 'TG05', 'TG06']
label = list("ABCDE")

radar = Radar(fig, titles, label)
radar.plot([3.75, 3.25, 3.0, 2.75, 4.25, 3.5], "-", linewidth=2, color="b",  alpha=.7, label="Data01")
radar.plot([3.25, 2.25, 2.25, 2.25, 1.5, 1.75],"-", linewidth=2, color="r", alpha=.7, label="Data02")

radar.decorate_ticks(radar.ax)

# this avoids clipping the markers below the thetagrid labels
radar.ax.xaxis.grid(clip_on = False)

radar.ax.legend(loc='upper center', bbox_to_anchor=(0.5, -0.10),
  fancybox=True, shadow=True, ncol=4)

plt.show()

结果：

在极坐标图的Thetagrid线上添加刻度线

1 个答案: