append_df: Append DF using specified overwrite modes
In dkrozelle/toolboxR: Collection of functions and scripts for bioinformatics.

Description Usage Arguments Value

Given a main df, either replace, append, or warn of conflict for values found in matching column and row of new df. Row is matched by a paired id value.

1 2	append_df(main, new, id = "Patient", mode = "safe", verbose = TRUE, delim = "; ")

`main, new`	data frames, each with column "id".
`id`	column name used to designate matching rows.
`mode`	"append" any new values to preexisting values using delimiter, "replace" any preexisting values with new value, or "safe" (DEFAULT) to only write new value if no preexisting valuethe search column name.
`verbose`	not yet implemented
`delim`	string value used to append new values during "append" mode.