Calculate return for a set of securities downloaded using quantmod

deb
I downloaded adjusted closing price using quantmod for a set of securities. I want to calculate daily/weekly/monthly return for all securities. Usual dailyReturn, weeklyReturn etc not working. What do I need to do? Here is my code. tickers <- c('FB','MMM') data_env <- new.env() getSymbols(Symbols = tickers, env = data_env) tempPort <- do.call(merge, eapply(data_env, Ad)) head(tempPort ) MMM.Adjusted FB.Adjusted 2007-01-03 57.00983 NA 2007-01-04 56.78401 NA 2