Alternatively, if you can find a way to do this outside of macro code, the iterative do statement in a data step DOES allow fractional increments:

On 10/2/06, toby dunn <tobydunn@hotmail.com> wrote: > > Minze , > > No you cant to fractional values in a %Do Loop, why, well because the %Do > Loop uses an implicit call to %Eval which only does integer values. > > Common way to over come this is: > > %Let Values = 0 0.5 1 ; > > %Do I = 1 To 3 ; > %Put %Scan( &Values , &I , %Str( ) ) ; > %End ; > > > > > Toby Dunn > > When everything is coming at you all at once, your in the wrong lane. > > A truly happy person is someone who can smile and enjoy the scenery on a > detour. > > > > > > From: Minze Su <slhappyls@GMAIL.COM> > Reply-To: Minze Su <slhappyls@GMAIL.COM> > To: SAS-L@LISTSERV.UGA.EDU > Subject: A question about %do %to statment in macro > Date: Mon, 2 Oct 2006 17:05:51 -0400 > > Dear all, > > I met the following problem: > > if I input this > > %macro outroc(dataset=ms.rocinput_mlr, stepsize=0.1, method='mlr'); > > > %do i=0 %to 1 %by 1; > %put &stepsize.; > %end; > > %mend outroc; > > It can give the right result. But if I change the step to 0.5. > > The log gives: > > > ERROR: A character operand was found in the %EVAL function or %IF > condition where a numeric > operand is required. The condition was: 0.5 > ERROR: The %BY value of the %DO I loop is invalid. > ERROR: The macro OUTROC will stop executing. > > Is it sas can not use a fractional value as step in do loop of Macro. Can > anyone help? > > Thank you in advance > > Best regards, > > Minze >