MATLAB: How to Create a mat file for images

Question

i have 15 images say x1=[1 2

                     3 4 ]
similarly x2 =[5 6
              3 4 ] , x3 till x15

first i want these to be converted to x1= [ 1

                                  2         
                                  3      
                                  4]            
similarly other matrixes also.

i want to save a mat file called

dark = [ 1 6

       2       7
       3      3   
       4       4]

Answer 1

A mat file called what?

Anyway, to save those variables:

save(matFileName, 'x1', 'x2, 'x3', 'x4', ...
'x5', 'x6', 'x7', 'x8', ...
'x9', 'x10', 'x11', 'x12', ...
'x13', 'x14', 'x15', 'dark');