如何交错向量项，用R中前面的值替换NAs

我有这个向量

myvec

。我想删除所有NAs并用前面的项目替换它们，然后得到结果

myvec

结果

AMLM12001KP  AMLM12001KP  1114002  1114002  1121501  1121501  1231401 
1231401  1231401  1231401

---

我们可以使用

na.locf

library(zoo)
na.locf(myvec)
#[1] "AMLM12001KP" "AMLM12001KP" "1114002"     "1114002"     "1121501"    
#[6] "1121501"     "1231401"     "1231401"     "1231401"     "1231401" 

library(zoo)
na.locf(myvec)
#[1] "AMLM12001KP" "AMLM12001KP" "1114002"     "1114002"     "1121501"    
#[6] "1121501"     "1231401"     "1231401"     "1231401"     "1231401"