finding mean

4 visualizaciones (últimos 30 días)
FIR
FIR el 12 de Jun. de 2012
I have a 30 matrix of size 256x256 stored in in different variables,
for ex the variables are A,D,R,T,Y,......ETC,EACH variable has same matrix size,now i want to find mean for each matrix and store it s mean values in a separate variable ,please help

Respuesta aceptada

the cyclist
the cyclist el 12 de Jun. de 2012
It's pretty awkward if there is no pattern to the naming of the variables, so if you can fix the naming problem upstream, you should try to do that. If you can't, then one approach is to define a function that takes a variable number of arguments, and does the mean of each one:
function arrayOfMeans = getMeans(varargin)
arrayOfMeans = zeros(nargin,1);
for n=1:nargin
arrayOfMeans(n) = mean(varargin{n}(:)); % Calculating means of all elements in array
end
end
Then call that function with the list of your variables as the input. For example,
>> getMeans(magic(3),rand(7),eye(4))
In your case, you would do
>> getMeans(A,D,R,T)
etc

Más respuestas (2)

Walter Roberson
Walter Roberson el 12 de Jun. de 2012
  1 comentario
FIR
FIR el 13 de Jun. de 2012
walter i have seen the link .but could not find a solution ,can u please tell how to get a solution as per my post posted above

Iniciar sesión para comentar.


Andrei Bobrov
Andrei Bobrov el 13 de Jun. de 2012
a = whos;
b = strcat({a(cellfun(@(x)isequal(x,[256 256]),{a.size})).name},',');
AD_etc = eval(['{',[b{:}],'}']);
AD_mean = cellfun(@(x)mean(x(:)),AD_etc,'un',0);
out = cell2struct([AD_etc;AD_mean],{'data','mean'});

Categorías

Más información sobre Matrix Indexing en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by