Hi:   Have you tried restricting the variables to Univariate using the VAR statement? Just because you have a HISTOGRAM statement does not limit the variables used for analysis. Usually the VAR statement restricts the variables used for analysis. This is what it says in the documentation for Univariate: "The VAR statement specifies the analysis variables and their order in the results. By default, if you omit the VAR statement, PROC UNIVARIATE analyzes all numeric variables that are not listed in the other statements." cynthia ... View more

As you have seen, everyone has his own favorite style.  Here's mine: data want;    do until (done1);       set have end=done1;       overall_sum + sum(of m1-m3);       overall_n + n(of m1-m3);    end;    overall_average = overall_sum / overall_n;    drop overall_sum overall_n;    do until (done2);       set have end=done2;       your_average = mean(of m1-m3);       output;    end; run; Good luck. ... View more