Using the Windows Interface

Data Transformations 22
GAUSS allows expressions that directly reference variables (columns) of a data set. This is done
within the context of a data loop:
dataloop infile outfile;
drop wagefac wqlec shordelt foobly;
csed = ln(sqrt(csed));
select csed > 0.35 and married $== "y";
make chfac = hcfac + wcfac;
keep csed chfac stid recsum voom;
endata;
GAUSS translates the data loop into a procedure that performs the required operations, and then
calls the procedure automatically at the location (in your program) of the data loop. It does this by
translating your main program file into a temporary file and then executing the temporary file.
A data loop may be placed only in the main program file. Data loops in files that are #include’d
or autoloaded are not recognized.
22-1
Data Loop