what is horzcat error.

disp('(a) Solution by mesh analysis')
VL=360*sqrt(3); % Line voltage magnitude
Zs=j*24; Zm=j*6; % Series and mutual impedances
Z= [(Zs-Zm) -(Zs-Zm) 0;
0 (Zs-Zm) -(Zs-Zm); % Matrix from 2 mesh equations
1 1 1 ]; % and one node equation
V=[VL*cos(pi/6)+j*VL*sin(pi/6); % RHS of mesh node equations
VL*cos(-pi/2)+j*VL*sin(-pi/2);
0 ];
Iabc=Z\V; % Line currents, Rectangular
Iabcp=[abs(Iabc), angle(Iabc)*180/pi] % Line currents, polar

Error using horzcat

Dimensions of matrices being concatenated are not consistent.

Error in S10Q6 (line 4)

Z= [((Zs)-(Zm)) -((Zs)-(Zm)) 0;

[KSSV]

Geenerally this error occurs when you join unequalled size arrays.

[rand(2,1), rand(3,1)]

Error using horzcat
Dimensions of arrays being concatenated are not consistent.

But it seems your code is fine:

[arian hoseini]

im confused i dont know why but i've runned the program again and it worked...

[DGM]

Just make sure to check the sizes of the variables being concatenated if you encounter similar errors in the future. It's easy to unintentionally expand something into an unexpected size, especially if you're used to older versions.

[arian hoseini]

thank u

Answer 1

[DGM]

It means that one or both of Zs or Zm are nonscalar. This works with scalars

Zs = 3;
Zm = 1;

Z= [(Zs-Zm) -(Zs-Zm) 0;
    0 (Zs-Zm) -(Zs-Zm);
    1 1 1 ]

Z = 3×3

2 -2 0 0 2 -2 1 1 1

If (Zs-Zm) were nonscalar, this concatenation wouldn't work.

[KSSV]

So OP has to clear the workspace and run...... j is already defined as vector, it is supposed to be a complex number.