search for: depth_3

...manner but I really have no other idea. I?m also wondering if it?s possible not using column numbers in a function, but the name if those are structured in the same way? Eg. depth_?followed by a number? If you want for example to do something with the columns depth_1, depth_1.5, depth_2, depth_2.5, depth_3 ? belonging to a dataframe with also other columns not related with the name depth (Like here, there is also the column time). I?m hoping there is something useful for that. Many thanks, Nerak -- View this message in context: http://r.789695.n4.nabble.com/manipulating-data-of-several-columns-sim...