Re: [Gretl-devel] really big data

On Mon, 18 Jun 2012, Allin Cottrell wrote: > (3) Open the source again: this time use both the --cols and > --rowmask options to extract the particular data we want. > > To give a sense of the current syntax, here's a hansl example > to carry out steps (1) to (3) above. I'll assume at first that > we're reading from a delimited text file. > > <hansl> > # read a specified column > open huge.txt --cols=15 --delimited > # create the observations mask > matrix mask = (gender == 1) > # re-open and read > open huge.txt --cols=1,2,20,156 --rowmask=mask --delimited --preserve > </hansl> I suppose we could make the --preserve options implicit in --rowmask. Otherwise, it makes little sense, doesn't it? Or am I missing something?