Answer to Question #2996 in MatLAB | Mathematica | MathCAD | Maple for geminia

Question #2996
Hi <br> I just need a little help with matlab <br> say if you have an array [2 5 10]<br> and you have a result from a different function say y=8<br> and want to find which numbers of the array have the same highest binary digit with y in the case <br>above y=[1000] and 2=[0010] 5=[0101] 10=[1010] so the only number in the array which has the same highest binary digit with 8 is 10. <br>How can i do this in matlab?
1
Expert's answer
2011-06-07T09:28:42-0400
function mx=q2996(y,x)
n=floor(log2(y)+1);
l=length(x);
mx=[];
for k=1:l
if floor(log2(x(k))+1)==n
mx=[mx x(k)];
end;
end;

Example:

mx=q2996(8,[2 5 10 12 16 18])

mx = 10 12

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