Hi All,

I had 12766 elements in a column, 12566 are values and 200 are "NA"s. I used the following line to get the ranks:

total_list$MB.rank <- rank(-total_list$MB,ties.method="min",na.last=NA)

 but I got an error message:

Error in `$<-.data.frame`(`*tmp*`, "BCRP_PW_F.rank", value = c(3949, 6182,  :
        replacement has 12199 rows, data has 12766

What shall I do to keep the "NA"s as "NA"s?  thanks a lot.

Jiong
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