How can I split one large matrix to struct with several fields?

I have matrix M 100 by 20, how can i split it to struct with 10 fields with size 10 by 20?

Thank you.

Answer 1

[Matt J]

M=rand(100,20);

Mcell=num2cell(permute(reshape(M,[10,10,20]),[1,3,2]),[1,2]);

cell2struct(Mcell, "f"+(1:10),3)

ans = struct with fields:
     f1: [10×20 double]
     f2: [10×20 double]
     f3: [10×20 double]
     f4: [10×20 double]
     f5: [10×20 double]
     f6: [10×20 double]
     f7: [10×20 double]
     f8: [10×20 double]
     f9: [10×20 double]
    f10: [10×20 double]