Inflearn Community Q&A
asked
member[2,3] <- 'doctor' 오류납니다.
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> member
name sex occup age
1 john M reporter 40
2 jeny F painter 24
3 rachael F runner 16
4 tom M singer 56
> age[1]
[1] 40
> name[3]
[1] "rachael"
> member[1]
name
1 john
2 jeny
3 rachael
4 tom
> member[,1]
[1] john jeny rachael tom
Levels: jeny john rachael tom
> member[1,]
name sex occup age
1 john M reporter 40
> member[1]
name
1 john
2 jeny
3 rachael
4 tom
> member$name
[1] john jeny rachael tom
Levels: jeny john rachael tom
> member$sex
[1] M F F M
Levels: F M
> member[2,4]
[1] 24
> member
name sex occup age
1 john M reporter 40
2 jeny F painter 24
3 rachael F runner 16
4 tom M singer 56
> member[2,4]
[1] 24
> member[2,3]
[1] painter
Levels: painter reporter runner singer
> member[2,3] <- 'doctor'
경고메시지(들):
In `[<-.factor`(`*tmp*`, iseq, value = "doctor") :
invalid factor level, NA generated
> member[2,3] <- 'doctor'
경고메시지(들):
In `[<-.factor`(`*tmp*`, iseq, value = "doctor") :
invalid factor level, NA generated
> member
name sex occup age
1 john M reporter 40
2 jeny F <NA> 24
3 rachael F runner 16
4 tom M singer 56
> member[2,3]
[1] <NA>
Levels: painter reporter runner singer
> member[2,3] <- "doctor"
경고메시지(들):
In `[<-.factor`(`*tmp*`, iseq, value = "doctor") :
invalid factor level, NA generated
> member[2,3]
[1] <NA>
Levels: painter reporter runner singer
> member
name sex occup age
1 john M reporter 40
2 jeny F <NA> 24
3 rachael F runner 16
4 tom M singer 56
> member[2,3] <- 'doctor'
경고메시지(들):
Answer
