As the title, what is the sas function of ∏?
Why not use the GEOMEAN function and then convert it to the product using power operator?
product = geomean(of x1-x3) ** n(of x1-x3);
Could you provide more information as to what extactly you have and are trying to accomplish...
product over … from … to … of | means a1a2···an. | = (1+2)(2+2)(3+2)(4+2)
| ||
the Cartesian product of; | means the set of all (n+1)-tuples
|
SAS Product Function (part of SAS/IML):
http://support.sas.com/documentation/cdl/en/imlug/59656/HTML/default/viewer.htm#langref_sect206.htm
For base SAS you can refence this previous post:
What I am looking for is the ak one. Multiplying different number
I'm not familiar with SAS having a multiplication function, unless you are actually referring to a factorial (i.e., !) for which there is the fact() function. Of course, you could always roll your own, e.g.:
data want;
input x1-x6;
array nums(*) x1-x6;
mult=nums(1);
do i=2 to dim(nums);
mult=mult*(1+(nums(1)/nums(i)));
end;
cards;
1 2 3 4 5 6
;
Why not use the GEOMEAN function and then convert it to the product using power operator?
product = geomean(of x1-x3) ** n(of x1-x3);
proc fcmp outlib=work.funcs.math;
function capital_pi(nums
mult=nums[1];
do i=2 to dim(nums);
mult=mult*(1+(1/nums));
end;
return(mult);
endsub;
test=capital_pi(1,2,3,4,5,6);
put test=;
run;
%let cmplib=%sysfunc(getoption(cmplib));
options cmplib=(work.funcs);
data _null_;
input x1-x6;
array x[6];
array nums[6] _temporary_; *Array parameters to subroutine calls must betemporary arrays.;
do i=1 to 6;
nums=x;
end;
product=capital_pi(nums);
put product=;
cards;
1 2 3 4 5 6
;
run;
options cmplib=&cmplib;
Result is 3.5
See http://www.sascommunity.org/wiki/Computing_Products
iusing wrote:
As the title, what is the sas function of ∏?
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