python - 使用 plot() 函数时 matplotlib 中的 RGBA 颜色“ro”无效
问题描述
我一直在尝试使用Figure.figure.plot()
matplotlib 中的函数
figplot = fig.add_subplot(111)
print(lines[2].get_xdata()[0])
print(lines[2].get_ydata()[0])
figplot.plot(lines[2].get_xdata()[0], lines[2].get_ydata()[0], c='ro')
但是在尝试执行此操作时,我收到以下错误消息:
Traceback (most recent call last):
File "/usr/lib/python3.7/tkinter/__init__.py", line 1705, in __call__
return self.func(*args)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/backends/_backend_tk.py", line 259, in resize
self.draw()
File "/usr/local/lib/python3.7/dist-packages/matplotlib/backends/backend_tkagg.py", line 9, in draw
super(FigureCanvasTkAgg, self).draw()
File "/usr/local/lib/python3.7/dist-packages/matplotlib/backends/backend_agg.py", line 388, in draw
self.figure.draw(self.renderer)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/figure.py", line 1709, in draw
renderer, self, artists, self.suppressComposite)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/image.py", line 135, in _draw_list_compositing_images
a.draw(renderer)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/axes/_base.py", line 2647, in draw
mimage._draw_list_compositing_images(renderer, self, artists)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/image.py", line 135, in _draw_list_compositing_images
a.draw(renderer)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/lines.py", line 783, in draw
lc_rgba = mcolors.to_rgba(self._color, self._alpha)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/colors.py", line 177, in to_rgba
rgba = _to_rgba_no_colorcycle(c, alpha)
File "/usr/local/lib/python3.7/dist-packages/matplotlib/colors.py", line 233, in _to_rgba_no_colorcycle
raise ValueError("Invalid RGBA argument: {!r}".format(orig_c))
ValueError: Invalid RGBA argument: 'ro'
我注意到对于散点图,颜色必须是一个数组,但这不是散点图。lines[2].get_xdata()[0]
和的值 lines[2].get_ydata()[0]
如下:
0.5766199490353112
1648.0609161647387
有没有办法找出问题所在?我正在使用 tkinter 和 matplotlib
解决方案
ro
是颜色标记代码。你应该删除c=
:
figplot.plot(lines[2].get_xdata()[0], lines[2].get_ydata()[0], 'ro')
或者也许可以在没有标记的情况下指定颜色o
:
figplot.plot(lines[2].get_xdata()[0], lines[2].get_ydata()[0], c='r')
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