Math & Science ⇒ Proper Alignment for Equations

[wicky_83]

I'm using the amssymb, amsmath packages to do equations. When I compile the following code

Code: Select all

\begin{equation}
  	w_j(k+1) = \biggl\lbrace 
\begin{split}
w_j(k),  j \notin N_{(k+1)} \\
w_j(k) + LR(k)*(x_k-w_j(k)),  j \in N_{(k+1)}
\end{split}
\end{equation}

I get the following output.

Untitled.png (12.85 KiB) Viewed 1998 times

Hi,

How can I remove the space shown by red lines. I tried the \begin{align} method but it does not work in my distribution.

Please tell me how to remove the unwanted white-space or is there any better way to do the same thing?

Thank you

[Stefan Kottwitz]

Hi Wicky,

instead of split, which is for complete formulas, you could use an aligned environment which is for aligned math blocks:

Code: Select all

\begin{equation}
  w_j(k+1) = \biggl\lbrace
    \begin{aligned}
      & w_j(k),  j \notin N_{(k+1)} \\
      & w_j(k) + LR(k)*(x_k-w_j(k)),  j \in N_{(k+1)}
    \end{aligned}
\end{equation}

Or a cases environment:

Code: Select all

\begin{equation}
  w_j(k+1) = 
    \begin{cases}
      w_j(k),  j \notin N_{(k+1)} \\
      w_j(k) + LR(k)*(x_k-w_j(k)),  j \in N_{(k+1)}
    \end{cases}
\end{equation}

Stefan

[wicky_83]

Thank you.