I have following code:
\begin{IEEEeqnarray}{c}
y = \beta_0 + \sum\limits_{i=1}^{m}{\beta_i x_i} + \sum\limits_{i = 1}^{m} \sum\limits_{j \geq 1}^{m}{\beta_{ij} x_i x_j} + \epsilon
\label{doe_eq}
\end{IEEEeqnarray}
\begin{tabular}{lll}
where, & $m$ &= total number of input parameters,\\
& $x_{i}$ &= $i$th system input,\\
& $y$ &= system output,\\
& $\beta_{0}$ &= model constant,\\
& $\beta_{i}$ &= linear constant,\\
& $\beta_{ij}$ &= \left \{ \begin{tabular}{l}
interaction constant when $i$\neq$j$,\\
quadratic constant when $i$=$j$,\\
\end{tabular} \\
& $\epsilon$ &= model bias
\end{tabular}
With this I get following errors:
line 553: Missing $ inserted. & $\beta_{ij}$ &= \left
line 554: Missing $ inserted. interaction constant when $i$\neq
line 555: Missing $ inserted. q
line 557: Missing \right. inserted. &
line 557: Missing $ inserted. &
: Unsupported document class (or package) detected,(caption) usage of the caption package is not recommended.
line 501: Underfull \hbox (badness 10000) in paragraph
I am not sure what is causing this exactly. Any idea?
Thank you.
\left\{
is valid only in math mode, and you can't use it without a\right
. I'd write just$\{$
, maybe with an explicit size declaration.\neq
should also be in math mode.cases
environment with this brace? Also, I would not write$m$= total number of...
but rather have a math formula and use\text
for "total number...". I think you can achieve your goal withalign*
instead of the outertabular
.