R GG显示数据中随机峰值的曲线图

当我尝试将数据从dataframe绘制到ggplot时，图形沿着直线有随机尖峰，我不知道为什么。我尝试过使用ggplot，但没有任何效果，所以我想知道我的数据帧是否配置不正确

数据框中有4组动物，在104周内记录了动物数量：

 head(mydata)
  time   group             size
1    0 rabbits               30
2    1 rabbits            31.38
3    2 rabbits      32.82561384
4    3 rabbits 34.3400006020094
5    4 rabbits  35.926471747402
6    5 rabbits 37.5884983951345

这是ggplot在运行时创建的

---

mydatay您的y变量已作为因子而不是数字导入。可能是因为列中的非数字数据。您可以通过使用as.character（）将列转换为字符，然后使用as.numeric（）将列转换为数字来解决此问题。谢谢，我将x和y变量都转换为字符，然后再转换回数字，这就解决了问题。
  ggplot(mydata, aes(x = time, y = size, group= group), main="lotka volterra model plot") +

    geom_line(aes(col = group)) +

  theme(axis.text = element_blank())

mydata<-structure(list(time = structure(c(1L, 2L, 18L, 29L, 40L, 51L, 
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