我的问题是：
使用python,用pandas读取数据，matplotlib画2行1列的子图
想要给两个子图中的线条设置颜色（每个子图有三条线），结果报错
附上我的代码和具体报错：
代码如下：
造成报错的地方，在下面第4行和第9行，已经加粗，求教我错在哪里，应该怎么修改
data = df['采集时间']
fig = plt.figure()
ax1 = fig.add_subplot(211)
ax1.plot(df['时间'],df[['1','2','3']],linewidth = 2,marker = '.',c=['r','g','b'])
ax1.set_title('走势图1')
plt.xticks(range(0,len(data),4))
ax1.set_xticklabels(data[::4])
ax2 = fig.add_subplot(212)
ax2.plot(df['时间'],df[['4','5','6']],linewidth = 2,marker = '.',c=['r','g','b'])
ax2.set_title('走势图2')
plt.xticks(range(0,len(data),4))
ax2.set_xticklabels(data[::4])
plt.rcParams['font.sans-serif']=['SimHei'] # 显示中文标签
plt.subplots_adjust(hspace = 0.4) # 设置两个图之间的间距
报错如下：
Traceback (most recent call last):
File "g:/Python/绘图测试.py", line 32, in <module>
plt.savefig(buffer)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\pyplot.py", line 722, in savefig
res = fig.savefig(*args, **kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\figure.py", line 2180, in savefig
self.canvas.print_figure(fname, **kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\backend_bases.py", line 2082, in
print_figure
**kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\backends\backend_agg.py", line 527, in print_png
FigureCanvasAgg.draw(self)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\backends\backend_agg.py", line 388, in draw
self.figure.draw(self.renderer)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\figure.py", line 1709, in draw
renderer, self, artists, self.suppressComposite)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\image.py", line 135, in _draw_list_compositing_images
a.draw(renderer)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\axes\_base.py", line 2647, in draw
mimage._draw_list_compositing_images(renderer, self, artists)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\image.py", line 135, in _draw_list_compositing_images
a.draw(renderer)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\artist.py", line 38, in draw_wrapper
return draw(artist, renderer, *args, **kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\lines.py", line 783, in draw
lc_rgba = mcolors.to_rgba(self._color, self._alpha)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\colors.py", line 177, in to_rgba
rgba = _to_rgba_no_colorcycle(c, alpha)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\colors.py", line 240, in _to_rgba_no_colorcycle
raise ValueError("Invalid RGBA argument: {!r}".format(orig_c))
ValueError: Invalid RGBA argument: ['r', 'g', 'b']
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