这可能很简单,所以提前道歉-我是R语言的新手。我希望将下面的SAS宏编码为R中的函数(这是从内存中获取的,因为我没有SAS的外部工作):
*ngFor="let mailingContact of facilityContacts | contactFilter:1:'ContactType'"
到目前为止,我已经对此进行了编码,但是在从一个x = emp_stat输入触发emp_stat1和emp_stat2时遇到问题。这可能吗?
%macro coalesce(x=);
proc sql;
create table test as select *
, coalescec(&x.1,&x.2) as &x
from survey_results;
quit;
%mend;
%coalesce(x=emp_stat)
谢谢!
答案 0 :(得分:0)
# create data
set.seed(21)
survey_results <- data.frame(a1 = sample(c(NA, 'q'), 10, T)
, a2 = sample(c(NA, 'w'), 10, T)
, stringsAsFactors = F)
survey_results
# # a1 a2
# 1 q w
# 2 <NA> w
# 3 q <NA>
# 4 <NA> w
# 5 q <NA>
# 6 q <NA>
# 7 <NA> w
# 8 <NA> <NA>
# 9 q <NA>
# 10 q w
library(dplyr) #loaded to use 'coalesce' function included in package
coalesce.fun <- function(x, df = survey_results){
# call coalesce on the input x pasted to . and the vector 1 to 2
# create data frame with it
# assign to 'out'
out <- data.frame(do.call(coalesce, df[paste0(x, 1:2)]))
# set column names to input
colnames(out) <- x
# return 'out'
out
}
test <- coalesce.fun('a')
# # a
# 1 q
# 2 w
# 3 q
# 4 w
# 5 q
# 6 q
# 7 w
# 8 <NA>
# 9 q
# 10 q
如果您希望在R中拥有一个proc sql
等效项,则可以使用sqldf
包。此功能应与上面的功能等效。
library(sqldf)
library(glue)
coalesce.fun <- function(x){
sqldf(glue('
select coalesce({x}1, {x}2) as {x}
from survey_results
'))
}