我有一个df,其中每列代表一个事件,并且单元格中有个人,像这样:
df=data.frame(topic1=c("a","b","c","d"),topic2=c("e","f","g","a"),topic3=c("b","h"))
我需要像这样在邻接df中对其进行转换:
topic1 topic2 topic3
a 1 1 0
b 1 0 1
c 1 0 1
d 1 0 0
e 0 1 0
f 0 1 0
g 0 1 1
h 0 0 1
THX!