SAS ‘interface’

1. SAS ‘interface’ editor, log, output menus/tabs“Solutions” tab (look it over to see what SAS can do)“Help” tab - for any of R, SAS, WinBUGS the internet has some very useful info but exercise a bit of caution when ‘unofficial’ help – www.sas.com, www.r-project.org, www.mrc-bsu.cam.ac.uk/bugs/, www.ats.ucla.edu/stat

2. Reading in Data Interactively (demonstration)SAS data sets with libnameslibname in 'C:\Documents and Settings\WHALEN\Desktop'access=readonly;options nofmterr;Look at log

3. Writing out Data Interactively (demonstration)Exporting SAS dataset in a portable format libname outto xport'C:\Documents and Settings\WHALEN\Desktop\neweff.xpt' ;proccopyin=work out=outto;select eff;run;Look at log

4. Data Steps Subsetting some variable and observationsdata a; set in.eff;keep subjid rxgp age status week slpchg sleep0;if itt=1 and week=99;run; Look at log

5. Data Steps Creating new variablesdata b; set in.eff;keep subjid rxgp age status slpchg sleep0 slpchg2 slpchg3;if itt=1 and week=99;if status='Completed'then slpchg2=slpchg; else slpchg2=0.1;slpchg3=slpchg*(status='Completed') + 0.1*(status ne 'Completed'); run;Look at log

6. Viewing and Checking Data View data interactively (demonstration)procprintdata=b; where slpchg2=0.1;run; procprintdata=b; where slpchg2 ne slpchg3;run;Look at log

7. Data Step Functions Similar functions as in R or othersdata c; set in.eff;keep subjid rxgp age status sleep0 logslp0 log10sp0 expslp0;where itt=1 and week=99;logslp0=log(sleep0);log10sp0=log10(sleep0); * longer names in later SAS ver.;expslp0=exp(sleep0);run;

8. Data Steps Creating new observationsdata d; set in.eff;keep subjid rxgp age status slpchg slpchg2 sleep0;if itt=1 and week=99thendo obnew=1to3; slpchg2=round(slpchg+ 0.5*normal(0),0.01);output;end;run;Look at log