Archive for January, 2009
Drzewa decyzyjne
Tuesday, January 13th, 2009 | Data Mining | No Comments
Dwa linki:
Ang: http://www.autonlab.org/tutorials/dtree18.pdf
Pl: http://www.fizyka.umk.pl/~duch/zajecia/05SemMagInf/03DT.pdf
Macro SAS - operacje na datach
Wednesday, January 7th, 2009 | SAS | No Comments
http://analytics.ncsu.edu/sesug/2006/SC11_06.PDF
%let StartDate = %Sysevalf( ‘01JAN2004′d ) ;
%let EndDate = %Sysevalf( ‘01JAN2006′d ) ;%let Date = %Sysfunc( InputN( 01JAN2006 , Date9 ) ) ;
%let Date2 = %Sysfunc( PutN( &Date , Date9 ) ) ;%let NumOfMonths = %Sysfunc( Intck( Month , &StartDate , &EndDate ) ) ;
%let NewDate = %Sysfunc( Intnx( Month , &StartDate , &NumOfMonths ) ) ;
%Sysevalf - Evaluates arithmetic and logical expressions using floating-point arithmetic
%Sysfunc - Execute SAS functions (nie obsługuje funkcji put, input, lag i kilku innych)
By zapisać datę do stringa użyj kodu:
…
translate(put(data,ddmmyy10.),”-”,”/”) as moja_data format=$18.,
catx (” “, “Przypominamy, ze dnia”, calculated moja_data) as text
…