我的数据由3个因子变量组成，每个变量有5个级别。
head(swiss_bn,n = 10)
A tibble: 10 × 3
arb_review blocks stops
<fctr> <fctr> <fctr>
1 exploratory [1,2] (0,2]
2 exploratory (3,5] (0,2]
3 exploratory (2,3] (0,2]
4 exploratory [1,2] (0,2]
5 exploratory [1,2] 0
6 exploratory (3,5] (2,4]
7 exploratory (3,5] (0,2]
8 exploratory (2,3] (0,2]
9 disoriented (5,23] (4,18]
10 disoriented (5,23] (4,18]
nlevels(swiss_bn$arb_review)
[1] 5
但是当我跑步时
library(bnlearn)
hc(swiss_bn)
我收到以下错误
Error in check.data(x) : variable arb_review must have at least two levels.