Normally that syntax should work.  It is when you try to use the paths with spaces or other special characters in a operating system command that you need the quotes.  Embed double quotes inside the outerquotes. filename xx '"c:\My Documents\xx.txt"'; You can also use dquotes on the outside (for SAS) so that SAS will resolve macro references.  In this cause the internal quotes need to be doubled up so that SAS knows they are not the end of the quote. filename xx """c:\My Documents\xx.txt"""; You can make it easier to type by using the quote() function. filename xx %sysfunc(quote("c:\My Documents\xx.txt")); ... View more

You do not need || for macro variable. %DO I=1 %TO 5;      Data file&I; Ksharp ... View more

Well, you obviously know that you can get various output data sets from the procedure. You can merge that data with your Weibull data, and then use SGPLOT (or the GTL, if it is really complicated) to overlay the curves on the same plot by using multiple SERIES statements. IF, for some reason, there is not an output data set that contains all of the LIFETEST results that you need, you can always use ODS OUTPUT to generate the data that underlies the K-M plot. For example,    ods output SurvivalPlot=plot; ... View more

By the way, you don't need the loop over all elements of Y. start LogLik(param) global (Y);    lamda = param[1];    gamma = param[2];    f = sum( exp((-lamda*Y)##gamma) );    return ( f ); finish; ... View more

And you can drop the name and label variables that gets created: PROC IMPORT OUT= WORK.test             DATAFILE= "XXXXXXXXXXXXX.xls"             DBMS=EXCEL REPLACE;      SHEET="XXXXXXX";      GETNAMES=NO;      MIXED=NO;      SCANTEXT=YES;      USEDATE=YES;      SCANTIME=YES; RUN; proc transpose data=test out=desired(drop=_name_ _label_);     id f1; run; ... View more

Well, if that's really what you want, you can wrap a little module around the loop like this:  start foo; do k=1 to 50;    z=1/( 1+EXP(-W*(X`)) ); /*I want to see this result at every k value*/    pause; end; finish; run foo; Alternatively, just print all the values and then scroll up in the output window.   2) You might want the SHOW command: http://blogs.sas.com/iml/index.php?/archives/142-Listing-SASIML-Variables.html   3) In SAS/IML Studio (which is good for beginners), you can use the pause in "open code" (=not in a module). See http://blogs.sas.com/iml/index.php?/archives/123-How-to-Learn-SASIML-Five-Resources-for-the-Beginner.html ... View more

If you have SAS/IML 9.22 software or later (after Nov, 2010), you can use the SUBMIT/ENDSUBMIT statements to call SAS procedures and DATA steps from PROC IML without losing the state of your IML session: submit; DATA SAMPLE_SET_A;    ... DATA SAMPLE_SET_B;    ... RUN; endsubmit; See http://support.sas.com/documentation/cdl/en/imlug/63541/HTML/default/viewer.htm#procs_toc.htm ... View more

Only one data step is needed. data test;    input Year Month Total;    obs = _n_; cards; 2009 4 16 2009 5 18 2009 6 12 2009 7 15 2009 8 11 2009 9 12 2009 10 7 2009 11 6 2009 12 9 ; proc print; run; ... View more

The call execute method is clean and clear. Macro wrapper method is instructive too. Before that, I was even thinking how to let the %pro_iterate(k=) to accept a sas data set as input, which has values 0.01, 0.02,... 0.10 ! Thank all of you. ... View more