search for: _1000

...2 i1 2 1 1 2 2 2 i2 2 2 1 2 2 2 For an arbitrary number of columns (say m1 ?. m199) where the column names have variable patterns, and such that each set of columns is repeated (with potentially unique data) an arbitrary number of times (say _1 ? _1000), I would like to summarize by row the mean values of (m1, m2, m3, ? m199) over all replicates (_1, _2, _3, ? _1000). I need to do this with a large number of dataframes of variable nrow, ncolumn, and colnames. I've tried various loops creating new dataframes and reassigning cell values in lo...