How to replace matrix elements by using statements?

I have a matrix which has 9x9 size.(mhw1)

so i want to change the elements which higher than 3 to 3 and lower than 1 to 1.

what am i doing wrong?

c=zeros(size(mhw1));
for i = 1:size(mhw1)
    if mhw1(i)>.3
        c(i)=3;
    elseif mhw1(i)<.1
        c(i)=1;
    end
end

Answer 1

[KSSV]

It is very simple and straight forward. Consider this example.

A = rand(3) ;
A(A<0.3) = 0 ;
A(A>0.8) = 1 ;

[Hasancan Saral]

Never thought it that way, that was on me.(forgot to think simple) Thanks for the answer.

Answer 2

[Ergin Sezgin]

Hello Hasancan,

You should use both rows and columns in two for loops to check and adjust each element in a 2D matrix.

for i = 1:size(mhw1,1)
    for j = 1:size(mhw1,2)
        if mhw1(i,j) > 3
            mhw1(i,j) = 3;
        elseif mhw1(i,j) < 1
            mhw1(i,j) = 1;
        end
    end
end

You can also perform it in a quicker and more efficient way:

mhw1(mhw1>3) = 3
mhw1(mhw1<1) = 1

I hope it helps.

[Hasancan Saral]

Thanks for the answer, always forgetting to think simple :)