Sources with the BigML Dashboard
6.5 Missing tokens
You can specify a list of tokens that will be considered equivalent to a missing value. By default, BigML recognizes the following ones:
""-?NANaNNILNULLN/Ananullniln/a#REF!#VALUE!#NULL!#NUM!#DIV/0#NAME?#N/A
You can alter the list at your own convenience using the corresponding input.