There doesn't seem to be a way.
I have tried it even by writing a macro code but that too could not be
made successful as the argument accepts a string with comma delimited
values.
Instead of blank,you could use an another value,say 0, and then select
it and could hide it by checking the zero values box in the
tool-options-view menu.Else,you could use a different character and
conditionally format it to white though it may not look good.