我有一个表格，因为y值在0上下波动，所以画图时特别不明显，我想问一下，如何设置每段间距所代表的数值 并且我根据
points(x =df2$y1, y = df2$y2, col = "red", type = "l")
points(x =df2$y1, y = df2$y3, col = "blue", type = "l")
legend("top", legend = c("rate1","rate2"), col = c("red","blue"), lty = 1)
画出来的图是这个样子的
所以我想问如何让每个间隔所代表的数字比较小？这样整个图就方便观察