如何解决R:xy.coords(x, y, xlabel, ylabel, log) 中的错误:'x' 是一个列表,但没有组件 'x' 和 'y'
我使用的是 R 编程语言。我正在尝试按照此处的说明制作我的数据的“k 最近邻图”:https://igraph.org/r/doc/knn.html
使用“igraph”库,我创建了一些假数据并制作了一个图表:
library(igraph)
file <-data.frame(
"source" = c(
"John","John","Tim","Alex","Andrew","Oliver","Matt","Steven","Charles","Sean","Ted","Ryan","Phil","Sam","Toby","Donald","Mitch","Mitch"),"target" = c("Sam","Peter","Ben","Kevin","Thomas","Dave","Kenny","Derek","CJ","Ivan","Kyle","Daniel","Chris","Scott","Henry","George","Paul","Jack","Luke","Myles","Elliot","Harvey","Owen")
)
graph <- graph.data.frame(file,directed=F)
graph <- simplify(graph)
plot(graph)
从这里开始,我能够成功地将此图转换为“k 最近邻图”(注意:我不确定如何指定“邻居数”):
knn(graph)
$knn
John Tim Alex Andrew Oliver Matt Steven Charles Sean Ted Ryan Phil Sam
2.500000 2.333333 4.000000 2.000000 1.000000 3.666667 1.500000 2.500000 4.000000 3.333333 1.500000 1.500000 2.500000
Toby Donald Mitch Peter Ben Kevin Thomas Dave Kenny Derek CJ Ivan Kyle
3.333333 1.500000 1.500000 5.000000 5.000000 3.000000 3.000000 3.000000 4.000000 4.000000 4.000000 4.000000 4.000000
Daniel Chris Scott Henry George Paul Jack Luke Myles Elliot Harvey Owen
4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000 4.000000
$knnk
[1] 3.954545 3.250000 2.733333 1.666667 2.000000
但由于某种原因,我无法绘制此图:
plot(knn(graph))
Error in xy.coords(x,y,xlabel,ylabel,log) :
'x' is a list,but does not have components 'x' and 'y'
有谁知道为什么会出现这个错误?有人可以告诉我我做错了什么吗?
谢谢
解决方法
你应该知道 knn(graph)
是一个列表,即,
> class(knn(graph))
[1] "list"
这就是为什么你不能在 plot
上使用 knn(graph)
我猜你想绘制的是knn(graph)$knn
,例如,
plot(rev(stack(knn(graph)$knn)))
plot(knn(graph)$knn)
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