How to subset data.frames stored in a list?

Question

I created a list and I stored one data frame in each component. Now I would like to filter those data frames keeping only the rows that have NA in a specific column. I would

Answer 1

Regarding the question in @Riccardo's last comment, try:

lapply(my.ls, "[", 1)

or alternately:

lapply(my.ls, "[[", 1)

depending on whether you want the output to be a list of dataframes or a list of vectors.