r - Most efficient way of ordering columns and creating rank variables -

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i have data frame several columns. want create function/loop or might more efficient take data frame, order column, create variable rank(with name rank_columnname) based on order , add data frame.

dat <- data.frame(indi1=rnorm(10),indi2=rnorm(10))  dat1 <- dat[order(dat$indi1), ] dat1$rank_indi <- 1:nrow(dat) dat2 <- dat1[order(dat1$indi2), ] dat2$rank_indi2 <- 1:nrow(dat2)

this example want, in cumbersome way. i've tried using lapply can't seem update data frame new column similar name.

any appreciated.

here's simple loop insert in "rank_indi" variables:

for(i in names(dat)){   dat[order(dat[,i]),paste0("rank_", i)] <- 1:nrow(dat) }    dat          indi1      indi2 rank_indi1 rank_indi2 1   1.45829065 -0.3322692         10          2 2   0.55972129  2.5031318          7         10 3   0.45870293 -0.6216859          6          1 4   1.03814922  1.4284271          9          8 5  -0.75211259  0.5600499          3          4 6  -1.89298552  0.8047825          2          6 7   0.03843679  0.6593377          5          5 8  -0.09808913  0.2513729          4          3 9   0.97862797  2.2650003          8          9 10 -2.07767889  1.0684134          1          7

edit: made mistake in earlier code


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