How can I create a matrix of size nxn (user input) where all outside numbers are 1, incrementally decreasing by 1 each layer the matrix goes in?

I am trying to write a code that creates something like this for a 5x5 matrix:

1 1 1 1 1

1 2 2 2 1

1 2 3 2 1

1 2 2 2 1

1 1 1 1 1

I currently have this:

rows = input('Input the amount of rows: ');

cols = input('Input the amount of columns: ');

A = [];

for r = 1:rows

for c = 1:cols

for n = 1: rows

if r == n || r == rows-n+1 || c == n || c == cols-n+1

A(r,c) = n;

fprintf('%d ', A(r,c))

end

end

end

fprintf('\n')

end

Answer 1

[Cameron]

n = 5;
mymat = zeros(n);
endVal = n;
startVal = 1;
for a = 1:ceil(n/2)
    indx = startVal:endVal;
    mymat(indx,indx) = a;
    startVal = startVal + 1;
    endVal = endVal - 1;
end
disp(mymat)

     1     1     1     1     1
     1     2     2     2     1
     1     2     3     2     1
     1     2     2     2     1
     1     1     1     1     1

Answer 2

[Stephen23]

N = 5;
V = min(1:N,N:-1:1);
M = min(V,V.')

M = 5×5

1 1 1 1 1 1 2 2 2 1 1 2 3 2 1 1 2 2 2 1 1 1 1 1 1