I only need to display the first 11 rows of the answer

My program displays an output with so many rows, but I only need the first 11. How do i solve this? Please help

This is the output (and not everything is shown because there are a lot of rows):

This is the desired output:

0.1 0.1 0.0

0.2 0.1 0.5877852523

0.3 0.1 0.8090169944

0.4 0.1 0.9510565163

0.5 0.1 1.0

0.6 0.1 0.9510565163

0.7 0.1 0.8090169944

0.8 0.1 0.5877852523

0.9 0.1 0.3090169944

1.0 0.1 0.0

This is my program:

l=1; %endpoint    
T=1; %maximum time 
alpha = 2; %constant 
m=10; 
N=20;
syms f(x) g(x,t)
f(x)=sin(pi*x);
g(x)=(sin(pi*x))*(cos(2*pi*t));
%STEP1
h=l/m;
k=T/N;
lambda=k*alpha/h;
%STEP2
wij = zeros(m,N,'sym');
for j=2:N
    wij(1,j)=0; %wij(0,j)
    wij(m,j)=0;
end
%STEP3
wij(1,1)=f(0); %wij(0,0)
wij(m,1)=f(l); 
%STEP4
for i=2:m-1
    wij(i,1)=subs(f(x),x,(i*h)); %wij(i,0)
    wij(i,2)=(1-lambda^2)*(subs(f(x),x,(i*h)))+(lambda^2/2)*(subs(f(x),x,((i+1)*h)))+(subs(f(x),x,((i-1)*h)))+k*(subs(g(x),x,(i*h)));
end
%STEP5
for j=2:N-1
    for i=2:m-1
        wij(i,j+1)=2*(1-lambda^2)*wij(i,j)+lambda^2*(wij(i+1,j)+wij(i-1,j))-wij(i,j-1);
    end
end
%STEP6
for j=1:N
    t=j*k;
    for i=1:m
        x=i*h;
        fprintf( '%.1f  %.1f  %s\n',x, t, char(vpa(wij(i,j),10)));
    end
end

Answer 1

[Walter Roberson]

%STEP6
stopping_loop = false;
for j=1:N
    t=j*k;
    for i=1:m
        x=i*h;
        if ~isempty(symvar(wij(i,j))
            stopping_loop = true;
            break;
        end
        fprintf( '%.1f  %.1f  %.10f\n',x, t, double(wij(i,j)));
    end
    if stopping_loop; break; end
end

[LightFury Yeji]

Unfortunately, this still does not work

[Walter Roberson]

l=1; %endpoint    
T=1; %maximum time 
alpha = 2; %constant 
m=10; 
N=20;
syms f(x) g(x,t)
f(x)=sin(pi*x);
g(x)=(sin(pi*x))*(cos(2*pi*t));
%STEP1
h=l/m;
k=T/N;
lambda=k*alpha/h;
%STEP2
wij = zeros(m,N,'sym');
for j=2:N
    wij(1,j)=0; %wij(0,j)
    wij(m,j)=0;
end
%STEP3
wij(1,1)=f(0); %wij(0,0)
wij(m,1)=f(l); 
%STEP4
for i=2:m-1
    wij(i,1)=subs(f(x),x,(i*h)); %wij(i,0)
    wij(i,2)=(1-lambda^2)*(subs(f(x),x,(i*h)))+(lambda^2/2)*(subs(f(x),x,((i+1)*h)))+(subs(f(x),x,((i-1)*h)))+k*(subs(g(x),x,(i*h)));
end
%STEP5
for j=2:N-1
    for i=2:m-1
        wij(i,j+1)=2*(1-lambda^2)*wij(i,j)+lambda^2*(wij(i+1,j)+wij(i-1,j))-wij(i,j-1);
    end
end
%STEP6
stopping_loop = false;
for j=1:N
    t=j*k;
    for i=1:m
        x=i*h;
        if ~isempty(symvar(wij(i,j)))
            stopping_loop = true;
            break;
        end
        fprintf( '%.1f  %.1f  %.10f\n',x, t, double(wij(i,j)));
    end
    if stopping_loop; break; end
end

0.1  0.1  0.0000000000
0.2  0.1  0.5877852523
0.3  0.1  0.8090169944
0.4  0.1  0.9510565163
0.5  0.1  1.0000000000
0.6  0.1  0.9510565163
0.7  0.1  0.8090169944
0.8  0.1  0.5877852523
0.9  0.1  0.3090169944
1.0  0.1  0.0000000000
0.1  0.1  0.0000000000

[LightFury Yeji]

Oh, thank you so much!