Matrix Multiplication Macro

cmshaw91 — Fri, 15 Apr 2016 17:29:59 GMT

Hello all,

My organization does not have IML, only base SAS. So I'm using a macro compute matrix multiplications. This macro works but I have another macro that does matrix multiplaction i number of times. When I run the following macro it only gives me a one period ahead matrix when it should give 6. Any thoughts?

%macro loop (n=);
%do i = 2 %to &n.;
data _null_; i_minus_1= &i.-1; call symput( 'i_minus_1', i_minus_1); run;
%if &i.=2 %then %do;
%mat_product (in_data1 = m1
,in_data2 = m1
,out_data = m&i. );
%end;
%else %do;
%mat_product (in_data1 = m1 , in_data2 = m&i_minus_1., out_data= m&i.);
%end;
%end;
%mend;

%loop (n=6);

Re: Matrix Multiplication Macro

Ksharp — Sat, 16 Apr 2016 03:36:39 GMT

I would use DATA STEP to calculate ,not MACRO which would lost accuracy .

topic Matrix Multiplication Macro in SAS/IML Software and Matrix Computations

Matrix Multiplication Macro

Re: Matrix Multiplication Macro