fdrbind lakes a list of data frames or lists and merges them
together by rows very much like rbind does for its
arguments. But unlike rbind it specializes on data frames and
lists of columns only and performs the merge entriley at C leve which
allows it to be much faster than rbind at the cost of
generality.
fdrbind(list)The merged data frame.
lists of parts that can be either data frames or lists
Simon Urbanek
All parts are expected to have the same number of columns in the same order. No column name matching is performed, they are merged by position. Also the same column in each part has to be of the same type, no coersion is performed at this point. The first part determines the column names, if any. If the parts contain data frames, their rownames are ignored, only the contents are merged. Attributes are not copied, which is intentional. Probaby the most common implocation is that ff you use factors, they must have all the same levels, otherwise you have to convert factor columns to strings first.