Hi, I have a matrix: [,1] [,2] [1,] 11 31 [2,] 44 50 [3,] 23 100 [4,] 90 31 I use plot to draw the four points. Is there any way to label the point? for insatnce, for (11,31), it is "1", for (44,50), it is "4". Thanks!
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