Matlab中的Vertcat错误

Question

When I run a code it shows error using vertcat in the marked line. What does it mean and how to change it?

f = [-10 -20 -40 -10 -10 80 70 90];  
A = [ 1 1 2 1 3 0 0 0 -----> vertcat error
      2 1 3 2 2 0 0 0 
      1 2 1 1 0 0 0 0
     -1 0 0 0 0 1 1 1 
      0-1 0 0 0 1 1 1
      0 0-1 0 0 1 0 0 
      0 0 0-1 0 0 1 0
      0 0 0 0-1 0 0 1];

b  = [800 600 900 0 0 0 0 0]; 
ub = [inf inf inf inf inf 90 57 93]; 
lb = zeros(8,1); 
[x fval]=linprog(-f,A,b,[],[],lb,ub);

Answer 1

A was missing some spaces. This should work:

A = [ 1 1 2 1 3 0 0 0;
      2 1 3 2 2 0 0 0;
      1 2 1 1 0 0 0 0;
      -1 0 0 0 0 1 1 1;
      0 -1 0 0 0 1 1 1;
      0 0 -1 0 0 1 0 0;
      0 0 0 -1 0 0 1 0;
      0 0 0 0 -1 0 0 1]

A =

     1     1     2     1     3     0     0     0
     2     1     3     2     2     0     0     0
     1     2     1     1     0     0     0     0
    -1     0     0     0     0     1     1     1
     0    -1     0     0     0     1     1     1
     0     0    -1     0     0     1     0     0
     0     0     0    -1     0     0     1     0
     0     0     0     0    -1     0     0     1