Others ⇒ How to resolve the error: “Missing { inserted” in WriteLatex

[FernandoRAJ]

When I use ShareLatex or MikTex to compile the following Latex code:

Code: Select all

   \begin{algorithm}
        \uIf{$|F_d(D'(C_{\hat{i}})) - F_d(D(C_{\hat{i}}))| > \sigma$ OR numSeqNoise > $\mu$}{
  	      SplitCluster($C_j$)\;
        } 
        \uElseIf{$|F_d(D'(C_{\hat{i}})) - F_d(D(C_{\hat{i}}))| > \tau$}{
  	      numSeqNoise++\;
        } 
  	    \uElseIf{$j \neq \hat{i}$}{
  		    Remove $S_{R}$ from cluster $C_j$\;
  		    Place $S_{R}$ in cluster $C_\hat{i}$\;
  	     }\uElse{
    	    Replace $S_{R}$ in cluster $C_\hat{i}$\;
         }
    \end{algorithm}

it compiles normally, but when I try to use WriteLatex, then the following error always happens:

Missing { inserted.
<to be read again>
\gdef
l.485 }
\uElse{

The line where the error is pointed out is "}\uElse{".

Somebody can help me?

[Johannes_B]

This seems to be a crosspost to How to resolve the error: “Missing { inserted.” inside an algorithm2e.

Please read what our administrator thinks about crossposts -> Gimme Pizza.

[FernandoRAJ]

Thank you, very much, for answers! It works!!
I would like to apologize for my mistake, but I will not do (crosspost) again.

[Johannes_B]

Crossposts are ok for me, but please cross reference the posts so a helper can check the progress.

Henri Menke already solved your problem, it was a missing pair of braces (C_{\hat{\imath}}). His tip of using imath to produce a dotless i is a very good one. He made some more improvements to your code, for example setting »numSeqNoise« upright in the first line and including the binary oparator > in the math-environment. Otherwise it is a textual > with the corresponding spacing which wouldn't make much sense.

You might even want to typeset the OR upright and maybe even bold.


Here is Henris code for future reference

Code: Select all

\documentclass{article}
\usepackage{algorithm2e}
\begin{document}
\begin{algorithm}
  \uIf{$|F_d(D'(C_{\hat{\imath}})) - F_d(D(C_{\hat{\imath}}))| > \sigma$ 
%\textup{\bfseries 
OR
%} 
$\mathrm{numSeqNoise} > \mu$}{
    SplitCluster($C_j$)\;
  } 
  \uElseIf{$|F_d(D'(C_{\hat{\imath}})) - F_d(D(C_{\hat{\imath}}))| > \tau$}{
    numSeqNoise++\;
  } 
  \uElseIf{$j \neq \hat{\imath}$}{
    Remove $S_{R}$ from cluster $C_j$\;
    Place $S_{R}$ in cluster $C_{\hat{\imath}}$\;
  }\uElse{
    Replace $S_{R}$ in cluster $C_{\hat{\imath}}$\;
  }
\end{algorithm}
\end{document}

Hint, you can click on »open in writelatex« to see the output.

[Stefan Kottwitz]

Hi Fernando,

welcome to the forum!

I tested you code too. Nice suggestion to use a dot less i with the hat, otherwise the hat should be shifted.

To have a look at the output (we like screenshots too )

algorithm.png (30.78 KiB) Viewed 95986 times

If you would have further questions, let us know.

Stefan