问题描述
我希望我能对如何将我的数据转换为R中的长格式感兴趣。
我想从数据框中的变量名称中分离出条件,发色团和源检测器。下面我粘贴了一些示例(但是数据框中还有更多变量)。因此,我需要选择“愤怒”和“快乐”并将它们放入变量“条件”中,然后将发色团 Hbo , HbR 和 Hbt ,最后是源检测器对“ 1,1”,“ 1,2”(也许是在逗号前后搜索和提取文本,因为我有49种组合)。
示例变量名称:
AngryHRFHbO,1,1 AngryHRFHbR,1,1 AngryHRFHbT,1,1 AngryHRFHbO,2,1 AngryHRFHbR,2,1 AngryHRFHbT,2,1 HappyHRFHbO,4,1 HappyHRFHbR,4,1 HappyHRFHbT,4,O,1 2,2 HRFHbR,2,2 HappyHRFHbT,2,2
谢谢您的帮助!
祝一切顺利, 卡罗琳
解决方法
我做了与上述数据类似的数据
library(tidyverse)
library(stringr)
df <- data.frame(obs = 1,"AngryHRFHbO,1,1" = 1,"AngryHRFHbR,1" = 0,"AngryHRFHbT,1" = 3,2,1" = 9,"HappyHRFHbT,4,1" = 4)
# obs AngryHRFHbO.1.1 AngryHRFHbR.1.1 AngryHRFHbT.1.1 AngryHRFHbO.2.1 AngryHRFHbR.2.1 HappyHRFHbT.4.1
# 1 1 1 0 3 9 0 4
这是解决问题的一种方法
df2 <- df %>%
pivot_longer(-obs,names_to = "Name",values_to = "Value") %>%
mutate(Name = str_replace_all(Name,regex("\\."),",")) %>% #you can ignore this line if the variables have the comma
mutate(Condition = str_extract(Name,regex("Angry|Happy")),Chromophore = str_extract(Name,regex("Hbo|HbR|Hbt",ignore_case = TRUE)),detector = str_extract(Name,regex("\\d[,]\\d$"))) %>%
select(-c(obs,Value))
# Name Condition Chromophore detector
# <chr> <chr> <chr> <chr>
# 1 AngryHRFHbO,1 Angry HbO 1,1
# 2 AngryHRFHbR,1 Angry HbR 1,1
# 3 AngryHRFHbT,1 Angry HbT 1,1
# 4 AngryHRFHbO,1 Angry HbO 2,1
# 5 AngryHRFHbR,1 Angry HbR 2,1
# 6 HappyHRFHbT,1 Happy HbT 4,1
,
谢谢您的帮助!我能够用它得出我需要的结论。见下文:
df2 <- full_data %>%
pivot_longer(-c("ID","time"),values_to = "Value") %>%
mutate(Name = str_replace_all(Name,"_")) %>% #you can ignore this line
if the variables have the comma
mutate(Condition = str_extract(Name,regex("Angry|Happy|Fearful")),regex("HbO|HbR|HbT",Channel = str_extract_all(Name,regex("\\d+[_]\\d+$"))) %>%
select(c("ID","time","Name","Condition","Chromophore","Channel","Value"))