Thread Subject:

mean() and mean2()

what is the differences of mean() and mean2()?is it mean() is specific for maths algorithm and mean2() is used for image processing?

"wanna mt" <wanna281@gmail.com> wrote in message <i8omcg$grr$1@fred.mathworks.com>...
> what is the differences of mean() and mean2()?is it mean() is specific for maths algorithm and mean2() is used for image processing?

If you have an array A, then
the difference is that mean(A) calculates a mean value for each column of A, whereas mean2(A) will calculate the mean of all the elements in A

e.g.
A=[1 2; 3 4]

now try mean(A) and mean2(A), and see what you get.

Ross

"Ross W" <rosswoodskiwi@hotmail.com> wrote in message <i8oqds$3rr$1@fred.mathworks.com>...
> "wanna mt" <wanna281@gmail.com> wrote in message <i8omcg$grr$1@fred.mathworks.com>...
> > what is the differences of mean() and mean2()?is it mean() is specific for maths algorithm and mean2() is used for image processing?
>
> If you have an array A, then
> the difference is that mean(A) calculates a mean value for each column of A, whereas mean2(A) will calculate the mean of all the elements in A
>
> e.g.
> A=[1 2; 3 4]
>
> now try mean(A) and mean2(A), and see what you get.
>
> Ross

ok...now i get it..ok, thanx.. =)

On Oct 8, 11:09 pm, "wanna mt" <wanna...@gmail.com> wrote:
> what is the differences of mean() and mean2()?is it mean() is specific for maths algorithm and mean2() is used for image processing?

Whenever you have a question like this just type into the command line

help mean2
help mean

doc mean2
doc mean

Hope this helps.

Greg