I am getting the following error for my code, please help

Question

Code:

$$x(t) = 
\left[ \begin{array}{c}
i_{L1}(t)\\
i_{L2}(t)\\
v_{C1}(t)\\
v_{C2}(t)\\
i_l(t)
\end{array}\right]
$$
Recall that the input voltage $V_g$ is an independent voltage source and the load impedence is $Z_l = R_l + sL_l$. Apparently, the load is short-circuited by $S_2$ in Mode 1.\\
The circuit equations in Mode 1 can be written in the state space form $K\cdot x = A_1\cdot x + B_1\cdot u$, that is,

$$\left[ \begin{array}{ccccc}
L_1 & 0 & 0 & 0 & 0\\
0 & L_2 & 0 & 0 & 0\\
0 & 0 & C_1 & 0 & 0\\
0 & 0 & 0 & C_2 & 0\\
0 & 0 & 0 & 0 & L_l
end{array}\right] \frac{d}{dt} \left[ \begin{array}{c}
i_{L1}(t)\\
i_{L2}(t)\\
v_{C1}(t)\\
v_{C2}(t)\\
i_l(t)
\end{array}\right] = \left[ \begin{array}{ccccc}
0 & 0 & 1 & 0 & 0\\
0 & 0 & 0 & 1 & 0\\
-1 & 0 & 0 & 0 & 0\\
0 & -1 & 0 & 0 & 0\\
0 & 0 & 0 & 0 & -R_l
\end{array}\right] \left[ \begin{array}{c}
i_{L1}(t)\\
i_{L2}(t)\\
v_{C1}(t)\\
v_{C2}(t)\\
i_l(t)
\end{array}\right]$$

Error:

! Extra \right.
l.25 end{array}\right]
                       \frac{d}{dt} \left[ \begin{array}{c}

Welcome to TeX.SX! Please help us to help you and add a minimal working example (MWE) that illustrates your problem. It will be much easier for us to reproduce your situation and find out what the issue is when we see compilable code, starting with \documentclass{...} and ending with \end{document}. — , May 31 '15 at 17:07

score 3 · Answer 1 · answered May 31 '15 at 17:27

It's easier to set the matrices with package amsmath. This also improves the horizontal spacing. Things like the missing \ or not using $$ are already covered by the question comments.

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\[
  x(t) = 
  \begin{bmatrix}
    i_{L1}(t)\\
    i_{L2}(t)\\
    v_{C1}(t)\\
    v_{C2}(t)\\  
    i_l(t)
  \end{bmatrix}
\]
Recall that the input voltage $V_g$ is an independent voltage source and the
load impedence is $Z_l = R_l + sL_l$. Apparently, the load is
short-circuited by $S_2$ in Mode~1.\\
The circuit equations in Mode~1 can be written in the state space form
$K\cdot x = A_1\cdot x + B_1\cdot u$, that is,
%
\[
  \begin{bmatrix}
    L_1 & 0 & 0 & 0 & 0\\
    0 & L_2 & 0 & 0 & 0\\
    0 & 0 & C_1 & 0 & 0\\
    0 & 0 & 0 & C_2 & 0\\
    0 & 0 & 0 & 0 & L_l
  \end{bmatrix}
  \frac{d}{dt}
  \begin{bmatrix}
    i_{L1}(t)\\
    i_{L2}(t)\\ 
    v_{C1}(t)\\ 
    v_{C2}(t)\\ 
    i_l(t) 
  \end{bmatrix}
  =
  \begin{bmatrix}
    0 & 0 & 1 & 0 & 0\\
    0 & 0 & 0 & 1 & 0\\
    -1 & 0 & 0 & 0 & 0\\
    0 & -1 & 0 & 0 & 0\\
    0 & 0 & 0 & 0 & -R_l
  \end{bmatrix}
  \begin{bmatrix}
    i_{L1}(t)\\  
    i_{L2}(t)\\  
    v_{C1}(t)\\  
    v_{C2}(t)\\  
    i_l(t)
  \end{bmatrix}
\]
\end{document}

I am getting the following error for my code, please help

1 Answers1