Re: [Gretl-devel] really big data

(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>