How can I create a matrix (4x10 for example) like this and insert it into a loop?

Hello dear users of MATLAB,

My question is that how can I create a matrix (4x10 for example) like this and insert it into a loop:

(-5    -4    -3    -2    -1     0     1     2     3     4     5)
( 0    -4    -3    -2    -1     0     1     2     3     4     0)
( 0     0    -3    -2    -1     0     1     2     3     0     0)
( 0     0     0    -2    -1     0     1     2     0     0     0)

My code is this:

%entering data
K = 51.5; %W/m*K 
T0 = 300; %K
q = 300; %W
v = 1; %m/s
rho = 7700; %kg/m3
C = 444; %j/kg*C
n=10;
m=10;
lambda = (((C*rho/K)))/2;
    
%creating vectors 
X=zeros(m,n);
Z=zeros(m,n);
% Y=zeros(m,n);
Tmax=zeros(m,n);

Y=0;  
% for i = 1:n       
% Y(i)=0;
% end     

for i = 1:n          
    for j = 1:m
        
        X(i,j)=-0;005+(i-1)*10/(n-1);
        Z(i,j)=0+(j-1)*(-0.00005)/(m-1);
        K1(i,j)=exp(-lambda*X(i,j).*v);
        R(i,j) = sqrt(X(i,j).^2+Y.^2+Z(i,j).^2);
        K2(i,j)=1./R(i,j)*exp(-lambda*R(i,j)*v);
        d(i,j)=K1(i,j)*K2(i,j)*1.;
      
        Tmax(i,j)=T0+d(i,j)*(q*0.6/(2*pi*K));  
    end
end
        
% subplot(3,1,1), contour(X,Z,Tmax), colormap
% title('Temperature (Steady State)'),ylabel('Z'),xlabel('X'),colorbar
% camroll(-180)
% subplot(3,1,2), pcolor(X,Z,Tmax), shading interp
% title('Temperature (Steady State)'),ylabel('Z'),xlabel('x'),colorbar
% camroll(-180)

The problem is with X and Z.

Answer 1

[KSSV]

row = -5:+5 ;
iwant = zeros(4,length(row)) ;
iwant(1,:) = row ;
for i = 2:4
  iwant(i,i:end-i+1) = row(i:end-i+1) ; 
end
iwant