Recodes, dummy variables, and product terms can be generated temporarily within the program itself, so that the user will not have to create such variables before running a regression.
Ordinarily this program is invoked by the Web interface for the SDA programs, and the user does not have to deal with the keywords given in this document. Output from the program is in HTML, which can be viewed with a Web browser.
It is also possible to run the program directly by preparing a batch command file, which specifies the variables to be analyzed and the options to use. This document explains how to prepare such a file. The name of this batch command file is specified to the program after the `-b' option flag.
Keyword Possible Specification Default (if no keyword) _____________________________________________________________________ STUdy= path(s) of dataset(s) Look for variables in the current directory only DEP= name of dependent variable REQUIRED INDep= names of independent vars REQUIRED (separated by spaces/commas) Weight= name of weight variable No weighting Filter= name(s) and codes of filter No filter variable(s) STRatum= name of variable giving No stratification for sample stratum computing standard errors $1: Force one stratum CLuster= name of variable giving No cluster variable for sample cluster computing standard errors NDECimals= number of decimals for main 3 decimal places results (coefficients, SE's) SAvefile= filename to receive output Output sent to screen (overwrite existing file) (standard output) DUMMYgenmax= A number between 1 and 100 Max of 25 dummy vars can be (max dummy vars) generated by the "m:" syntax for a single categorical var GVARCase= LOWER or UPPER No force to lower/upper case
Keyword Possible Specification Default (if no keyword) _____________________________________________________________________ COLORcoding= Yes No color coding of cells or colored headings LAnguagefile= Name of file with non-English English labels on labels and messages output RUNtitle= Title or comments for run No title or comments SHORTlist= Yes (omit list of Output list of all indep vars at top) independent variables TExt= Yes No text for variables
Note that the `otherstats=' keyword can be repeated on subsequent lines if necessary.
Keyword Possible Specification Default (if no keyword) _____________________________________________________________________ OTHERstats= TTests (ndec) No T-tests FTest (ndec) No Global F-test UNIvariate (ndec) No univariate stats BPRODuct (ndec) No B*coefficent stats CORel (ndec) No correlation matrix COVar (ndec) No covariance matrix COEFF (ndec) No covar of coefficients matrix CONF (90, 95, or 99) No confidence intervals ('CONF' alone gives 95% CI)
For the other (optional) statistics, the default numbers of decimals are as follows:
This appending feature applies to the keywords for specifying the independent variables, the filter variables, and the 'otherstats=' keyword. It also applies to the 'study=' keyword, for specifying the locations of the SDA dataset directories. If other keywords are repeated, the program will print an error message and stop.
dep = spend indep = age, educ gender savefile = myregress.htm -----------------------------------# Redefine some ranges, use weight and filter variables,
dep = spend indep = age(18-30) educ gender weight= wtvar filters= var21(1-3) var30(1) text = yes savefile = myregress.htm -----------------------------------# Specify stratum and cluster variables,
dep = spend indep = age, educ gender stratum = stratvar cluster = psuvar savefile = myregress.htm -----------------------------------# Specify the location of the SDA study datasets
study = /sa/testdata study = /sa/testdata/newvars dep = spend indep = age educ gender recodedvar otherstats = ttests ftest(4) univar(3) correl(3) savefile = myregress.htm