Add missing value in column with value from row above

Question

Every week I a incomplete dataset for a analysis. That looks like:

df1 <- data.frame(var1 = c(\"a\",\"\",\"\",\"b\",\"\"), 
             var2 = c(\"x\",\"         


        

Answer 1

The tidyr packages has the fill() function which does the trick.

df1 <- data.frame(var1 = c("a",NA,NA,"b",NA), stringsAsFactors = FALSE)
df1 %>% fill(var1)