replace elements of a matrix with another matrix

Hai

I need to replace the element of matrix 'A' by matrix 'a' if the value of the element is greater than 50 and by matrix 'b' if the value is less than 50,so that i will get a 32x32 matrix.I have given the code below.Help me please.thanks

A = randi (100 , 16 , 16) ;

a=[5 5;5 5];

b=[20 20;20 20 ];

for i = 1:16

for j = 1:16

if A (i , j ) > 50

R( i,j ) = [a] ;

else

R( i,j ) = [b] ;

end

end

end

[KALYAN ACHARJYA]

I have an question, suppose you have matrix A=[4 5 7;8 9 10]; now replace 7 by matrix a as given in your question? What would be the result in this case?

[geetha senthil]

i am getting an element of matrix replaced by an element and not an element by a matrix.

[KALYAN ACHARJYA]

You didnot provide the answer of my question, what would be the asnwer as per your logic??

Result=??

Answer 1

[JESUS DAVID ARIZA ROYETH]

solution :

A = randi (100 , 16 , 16) ;
s=A>50;
a=[5 5;5 5];
b=[20 20;20 20 ];
R=num2cell(A);
R(s)={a};
R(not(s))={b};
R=cell2mat(R)

[geetha senthil]

It is working...thank u...

[Patrick Rousseau]

Thanks for this! Helped me out aswell.