save structures with fields in one .mat file

I have n structures. Inside each of the n structures there are 6 fields and one struct array of size 20 each of them containing 2 fields

here is the code:

for i = 1:10

for j = 1:20

image_struct(i).reg(j) = registerImage(Moving,Fixed);

end

end

the image_struct(i) contains the following fields :

example with i = 1

>> image_struct_toID(1)

struct with fields:

name: 'image1'

original: [272×247×3 uint8]

IDnr: '000012'

Coord: [106 94]

circle_Radi: 43

circularimage: [87×87 double]

reg: [1×20 struct]

the structure array reg contains the following :using j = 1 as example :

>> image_struct_toID(1).reg(1)

struct with fields:

RegisteredImage: [87×87 double]

DisplacementField: [7656×2 double]

for each index i and j I want to save the resulting structures and fields in one . mat file , how can I do this ?

That is, I want everything stored in one .mat file

[Stephen23]

"I want everything stored in one .mat file"

save('myfile.mat','image_struct')

Using indexing is the simplest and most efficient way to access the elements of a non-scalar structure.

[Eirik Kvernevik]

thank you !

I also found out that if I want to store the structures while the for loops are running I can do this :

for i = 1:10

for j = 1:20

image_struct(i).reg(j) = registerImage(Moving,Fixed);

end

imageStruct.(sprintf('b%d',i)) = image_struct(i);

save('myfile.mat','-struct','ImageStruct');

end