Hi there, i want to write a procedure which can initiat the sexond procedure accodingly. For example, f1(a,b,c,d,e,f) where a,b,c,d,e,f is set of different atoms. say, Here I only need to deal with a and d type atoms to calculate energy values through f2 procedure.    

f1:=proc(a,b,c,d,e,f)   
.....
.....
end proc;

How i can write a procedure to assign values, like f1(yes,no,no,yes,no,no) or with number as f1(1,0,0,1,0,0) to show i only need a and d results.