Need help to finish the below code to get sumproduct with arrays. Thanks
data test;
array xvals{1:1000} _TEMPORARY_;
array yvals{1:1000} _TEMPORARY_;
do i=1 to 1000;
sumproduct=sum(of xvals(i)*yvals(i)); /* I am stuck here ???*/
end;
run;
Thanks Reeza. Finally I came up with the below solution to have sum product for all 1000 values (variables in case of my dataset). This is same as excel sumproduct with few lines of SAS code. Kudos !!!
%macro vals;
%do i = 1 %to 1000;
&i
%end;
%mend;
data test;
array xvals{1000} _TEMPORARY_ (%vals);
array yvals{1000} _TEMPORARY_ (%vals);
sumproduct = 0;
do i=1 to 1000;
sumproduct= sum(sumproduct, (xvals(i)*yvals(i)));
end;
run;
You're not retaining anything between loop iterations, so the value you're getting, summing it doesn't error out, is the last summation.
This assumes that you want the sum of xvals(i)*yvals(i) and not something else.
data test;
array xvals{1:1000} _TEMPORARY_;
array yvals{1:1000} _TEMPORARY_;
sumproduct=0;
do i=1 to 1000;
sumproduct=sumproduct+xvals(i)*yvals(i); /* I am stuck here ???*/
end;
run;
Thanks Reeza. I tried that but still end result of sumproduct didn't give the expected result. started with 3 values, instead of 1000 and expected result for sumproduct is 14 = (1*1) + (2*2) + (3*3 ) which isn't coming with this code
data test;
array xvals{1:3} _TEMPORARY_;
array yvals{1:3} _TEMPORARY_;
sumproduct=0;
do i=1 to 3;
sumproduct=sumproduct+xvals(i)*yvals(i);
end;
run;
Where do you put the values in the array?
You need to give XVALS and YVALS some values.
data test;
array xvals{1:3} _TEMPORARY_ (1:3);
array yvals{1:3} _TEMPORARY_ (1:3);
sumproduct=0;
do i=1 to dim(xvals);
sumproduct=sumproduct+xvals(i)*yvals(i);
end;
run;
Thanks Reeza. Finally I came up with the below solution to have sum product for all 1000 values (variables in case of my dataset). This is same as excel sumproduct with few lines of SAS code. Kudos !!!
%macro vals;
%do i = 1 %to 1000;
&i
%end;
%mend;
data test;
array xvals{1000} _TEMPORARY_ (%vals);
array yvals{1000} _TEMPORARY_ (%vals);
sumproduct = 0;
do i=1 to 1000;
sumproduct= sum(sumproduct, (xvals(i)*yvals(i)));
end;
run;
What is the purpose of the ARRAYS? You are summing i*i.
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.