store multiple values in one variable

dataset_folder='D:\Project\resize\';
file_name=dir(fullfile(dataset_folder,'*.jpg'));
total_images=numel(file_name);
for n=1:total_images
    original=fullfile(dataset_folder, file_name(n).name);
    x=imread(original);
    r=x(250,250,1);
    g=x(250,250,2);
    b=x(250,250,3);
    ph_factor =(double(g)/double(b))/double(r);
    ph=sprintf('Red-%d Green-%d Blue-%d ph factor-%f',r,g,b,ph_factor);
    disp(ph);
end    

when i see the value of r,g,b and ph_factor only the value of last image is stored.

how can i store the values of all images for every iteration in the corresponding same variable?

Please help me

Answer 1

[KSSV]

dataset_folder='D:\Project\resize\';
file_name=dir(fullfile(dataset_folder,'*.jpg'));
total_images=numel(file_name);
r = zeros(250,250,total_images) ; 
g = zeros(250,250,total_images) ; 
b = zeros(250,250,total_images) ; 
ph_factor = zeros(250,250,total_images) ; 
for n=1:total_images
    original=fullfile(dataset_folder, file_name(n).name);
    x=imread(original);
    r(:,:,n)=x(250,250,1);
    g(:,:,n)=x(250,250,2);
    b(:,:,n)=x(250,250,3);
    ph_factor(:,:,n) =(double(g)/double(b))/double(r);
    ph=sprintf('Red-%d Green-%d Blue-%d ph factor-%f',r,g,b,ph_factor);
    disp(ph);
end    

[Siva Sankari]

i got this error sir

Subscript indices must either be real positive integers or logicals.

Error in rgbph (line 11)

r(:,:,i)=x(250,250,1);

[KSSV]

Ohh..yes the loop index is n not i.....edited the answer.

[Siva Sankari]

thank u so much sir .....it worked