dsi is the "ignore" counterpart of the function
Note, this function is best generated out of an existing ds function, by changing the function name to dsi
It takes up to 30 optional arguments and has the following form:
=dsi( [arg1], [arg2], …, [arg30] )
It does not issue an error if some of the input data make no sense to it.
It processes only the portion of data that forms a consistent input set and ignores all the rest.