Another bit of R

R makes it easy to chop up and reassemble data frames, whether it's with the subset() function or with dplyr's filter() function. It isn't always obvious how to do it for a whole data frame. That's where apply() is useful.
This will filter a data frame such that all columns have at least one value less than zero in any row, for example:
newdata.df <- data.df[ ,apply(data.df, MARGIN = 2, function(x) any(x < 1))]

any() can be exhanged for all() to restrict the selection to columns in which all values are less than one.
The same code works for rows: just move the apply(...) in front of the comma, then change MARGIN to 1 instead of 2.