这个问题是
R – identify consecutive sequences的延伸
我有一个数据框,我需要只保留那些在ROI列中我有连续序列_aCORRECT1和_CORRECT1的试验.无论_aCORRECT1和_CORRECT1出现多少次都可以重复.
在下面的例子中,我可以保留ntrial 78和201,因为_aCORRECT1后跟_CORRECT1.
但是,我需要删除ntrial 10和400.在试验10中_aCORRECT1后面没有_CORRECT1.在试验400中_CORRECT1之前没有_aCORRECT1.
非常感谢！
subject ROI ntrial
sbj05 ff 78
sbj05 as 78
sbj05 fgfsd 78
sbj05 sgf 78
sbj05 jh 78
sbj05 sgsgsfg 78
sbj05 fgsfg 78
sbj05 sgf_aCORRECT1 78
sbj05 dfs_CORRECT1 78
sbj05 ffg 78
sbj05 sdfdsf 78
sbj05 sl 78
sbj05 wgrt 78
sbj05 qswefrd 201
sbj05 ssdg 201
sbj05 sdgfdsg 201
sbj05 sgsgd 201
sbj05 sgsdg 201
sbj05 dd_aCORRECT1 201
sbj05 dd_aCORRECT1 201
sbj05 ffds_CORRECT1 201
sbj05 ffds_CORRECT1 201
sbj05 ffds_CORRECT1 201
sbj05 hy 201
sbj05 gfg 201
sbj05 nbc 201
sbj05 cvbvn 10
sbj05 kpj 10
sbj05 nbvnb 10
sbj05 mnm 10
sbj05 dghsfh_aCORRECT1 10
sbj05 gdh 10
sbj05 fgjj 10
sbj05 gnjdg 10
sbj05 gf 10
sbj05 qw 400
sbj05 vfs 400
sbj05 zx 400
sbj05 zvzv 400
sbj05 zvzv_CORRECT1 400
sbj05 zvzd_CORRECT1 400
sbj05 zvv 400
sbj05 cv 400
sbj05 v 400
sbj05 mngy 400
最佳答案 使用dplyr,df1是一个数据帧,告诉你应该保留哪些ntrial值.这是通过为aCORRECT和_CORRECT设置逻辑指示符并检查每个分组的ntrial是否存在相邻值来完成的.然后df2是仅包含有效ntrial的df的版本
df1 <- df %>% mutate(aCOR=grepl("aCORRECT",ROI),COR=grepl("_CORRECT",ROI)) %>%
group_by(ntrial) %>% summarise(keep=any(aCOR & lead(COR)))
df2 <- df[df$ntrial %in% df1$ntrial[df1$keep],]
df1
# A tibble: 4 × 2
ntrial keep
<int> <lgl>
1 10 FALSE
2 78 TRUE
3 201 TRUE
4 400 FALSE
df2
subject ROI ntrial
1 sbj05 ff 78
2 sbj05 as 78
3 sbj05 fgfsd 78
4 sbj05 sgf 78
5 sbj05 jh 78
6 sbj05 sgsgsfg 78
7 sbj05 fgsfg 78
8 sbj05 sgf_aCORRECT1 78
9 sbj05 dfs_CORRECT1 78
10 sbj05 ffg 78
11 sbj05 sdfdsf 78
12 sbj05 sl 78
13 sbj05 wgrt 78
14 sbj05 qswefrd 201
15 sbj05 ssdg 201
16 sbj05 sdgfdsg 201
17 sbj05 sgsgd 201
...
