r语言中,with,which用法的问题,b b b[1] 101 102> with(subset(recommendation[user==1,]),which(item==101))[1] 1> with(subset(recommendation[user==1,]),which(item==102))[1] 3> with(subset(recommendation[user==1,]),which(b%in%item))[1] 1 2应该输

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r语言中,with,which用法的问题,b b b[1] 101 102> with(subset(recommendation[user==1,]),which(item==101))[1] 1> with(subset(recommendation[user==1,]),which(item==102))[1] 3> with(subset(recommendation[user==1,]),which(b%in%item))[1] 1 2应该输
r语言中,with,which用法的问题,
b b b
[1] 101 102
> with(subset(recommendation[user==1,]),which(item==101))
[1] 1
> with(subset(recommendation[user==1,]),which(item==102))
[1] 3
> with(subset(recommendation[user==1,]),which(b%in%item))
[1] 1 2
应该输出1和3呀怎么是2

r语言中,with,which用法的问题,b b b[1] 101 102> with(subset(recommendation[user==1,]),which(item==101))[1] 1> with(subset(recommendation[user==1,]),which(item==102))[1] 3> with(subset(recommendation[user==1,]),which(b%in%item))[1] 1 2应该输
这个是which(item.x==101)),不是which(item==101))吧
还有which(b%in%item.x))
一开始有item.x这一列元素的,后面怎么都是item了呀?
你能把信息再补充多一点吗?譬如把 m 给出来看一下.

r语言中,with,which用法的问题,b b b[1] 101 102> with(subset(recommendation[user==1,]),which(item==101))[1] 1> with(subset(recommendation[user==1,]),which(item==102))[1] 3> with(subset(recommendation[user==1,]),which(b%in%item))[1] 1 2应该输 at which 和with which的用法 of which /in which / with which /for which 的用法 英文中with,of,for的用法,that、which连接词的用法各是怎么用的, 本人急求in which.on which .by which .with which.for which .of which 的用法解析 ...本人急求in which.on which .by which .with which.for which .of which 的用法解析 在下不才 SQL 中with的用法 定语从句中of which的用法 定语从句中which的用法 宾语从句中which的用法 verilog语言中always的用法 C 语言中assert的用法 which的用法in which 的用法 正弦定理中2R的用法? 高中英语语法中,With的用法? 英语中 to for with 的用法 RT,谁知道gmat中with的用法 C语言中WHILE的用法问题while（）；；}这两个有没有区别,是不是前者一定要加；结束? from which的用法