我的数据看起来像这样：
x = A，A，B，C，D，E，E，F，G y = 1、0、2、3、4、5、0、6、7
How do I have every alternate x-axis data point a different colour? For example, in my data, I would like to have the A, C, E and G points one colour, B, D, F another and then have the points where the value is 0 a third colour? I've used pch = and col= to change the colour and shape of everything, but is it possible to change specific points?
还是我必须在同一图上绘制两个不同的图，然后更改每个图的颜色，然后为零设置第三条规则？唯一的问题是，由于我的变量不是数字变量，并且数据需要交替显示，因此我似乎无法弄清楚如何绘制它。
