Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.


Curious
Posts:
2,221
Registered:
12/6/04


Re: matrix mean
Posted:
Sep 9, 2013 2:01 PM


"someone" wrote in message <l0kkvm$o3m$1@newscl01ah.mathworks.com>... > "Puneet" wrote in message <l0kc2v$l2a$1@newscl01ah.mathworks.com>... > > Hi  this is begginers question. > > I have a data set  16 rows and 16 columns  I would like to average every 2 points to get an 8 rows 8 columns matrix. > > > > This is a learning phase so I can run something similar later for larger data sets. > > Thanks. > > %Perhaps something like: > > a = rand(16,16); > b = a(1:2:15, 1:2:15); % odd rows & columns > c = mean(b(:)); > > % may not be most efficient, > % but you should get the idea > > % I'll leave the even rows & columns to you > % (you didn't specify which you wanted).
Actually I realized I misread your OP. But even so, going from a 16X16 to a 8X8 matrix would average every fourth point. (Or something like that.) So, I guess I don't understand the OP.



