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我正在尝试了解雷达图如何在 matplotlib 中工作。我在这个线程中使用代码,但是我制作的图没有正确居中并且缺少轴。我已经尝试使用 matplotlib 1.3.1、1.4.1 和 1.5.1,以防在最后一个版本中发生了变化。

在此处输入图像描述

import numpy as np
import pylab as pl

class Radar(object):

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

        self.n = len(titles)
        self.angles = 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]
        self.ax.set_thetagrids(self.angles, labels=titles, fontsize=14)

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

        for ax, angle, label in zip(self.axes, self.angles, labels):
            ax.set_rgrids(range(1, 6), angle=angle, labels=label)
            ax.spines["polar"].set_visible(False)
            ax.set_ylim(0, 5)

    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 = pl.figure(figsize=(6, 6))

titles = list("ABCDE")

labels = [
    list("abcde"), list("12345"), list("uvwxy"), 
    ["one", "two", "three", "four", "five"],
    list("jklmn")
]

radar = Radar(fig, titles, labels)
radar.plot([1, 3, 2, 5, 4],  "-", lw=2, color="b", alpha=0.4, label="first")
radar.plot([2.3, 2, 3, 3, 2],"-", lw=2, color="r", alpha=0.4, label="second")
radar.plot([3, 4, 3, 4, 2], "-", lw=2, color="g", alpha=0.4, label="third")
radar.ax.legend()
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1 回答 1

4

我有同样的问题,但我发现问题出在以下部分:

self.angles = np.arange(90, 90+360, 360.0/self.n)

所以改成

self.angles = np.arange(0, 360, 360.0/self.n)

ax并改为旋转每个ax.set_theta_offset(np.deg2rad(90))

修改后的类如下所示:

# Python 3.4
# matplotlib 1.5.3
class Radar(object):
    def __init__(self, fig, titles, labels, rotation=0, rect=None):
        if rect is None:
            rect = [0.05, 0.05, 0.95, 0.95]

        self.n = len(titles)
        self.angles = np.arange(0, 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]
        self.ax.set_thetagrids(self.angles, labels=titles, fontsize=14)

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

        for ax, angle, label in zip(self.axes, self.angles, labels):
            ax.set_rgrids(range(1, 6), angle=angle, labels=label)
            ax.spines["polar"].set_visible(False)
            ax.set_ylim(0, 6)
            ax.set_theta_offset(np.deg2rad(rotation))

    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)

注意:我在最后一个循环中添加了参数并将旋转应用于rotation=0所有。__init__ax

我知道这个问题被问到已经有一段时间了,但我认为其他人会偶然发现这个问题。

于 2016-12-14T06:59:00.203 回答