[Tex/LaTex] Shared author affiliation in ACM Sig-proc

acmaffiliationauthor-number

I had a paper in IEEE format, that was using \IEEEauthorblockN and \IEEEauthorblockA for shared affiliation, nicely as shown below. Now I need to change the format to ACM. How can I do the same thing to ACM Sig-proc format?

\documentclass[letterpaper]{sig-alternate}
%...
\newcommand{\superscript}[1]{\ensuremath{^{\textrm{#1}}}}
\def\sharedaffiliation{\end{tabular}\newline\begin{tabular}{c}}

\def\wu{\superscript{*}}
\def\wg{\superscript{\dag}}
%.... later
    \author{\IEEEauthorblockN{aa\wu, bb\wu, cc\wu, dd\wu\wg, ff\wu}
    \IEEEauthorblockA{
    %  \sharedaffiliation
      \begin{tabular}{ccc}
        \wu Department of Computer Science & & \wg Department of Surgery \\
        University         & & Hospital \\
      \end{tabular}
      ~\\
    Email: \{aa,bb,cc,dd,ff\}@university.edu}
    }

Best Answer

Insert this piece of coding just before the

\begin{document}

like so... 

%
\def\sharedaffiliation{%
\end{tabular}
\begin{tabular}{c}}
%
\begin{document}

and then adjust your particular 'author block' like so (example shown for 3 authors)... 

\title{Alternate {\ttlit ACM} SIG Proceedings Paper in LaTeX
Format\titlenote{(Produces...}}

\numberofauthors{3}
% Three authors sharing the same affiliation.
    \author{
      \alignauthor Ben King\\      
      \email{king@cs.berkeley.edu}
%
      \alignauthor Georgia Tobin\\     
      \email{tobin@cs.berkeley.edu}
%
      \alignauthor Gerald Murray\\    
      \email{murrray@cs.berkeley.edu}
%
      \sharedaffiliation
      \affaddr{Department of Electrical Engineering and Computer Science}  \\
      \affaddr{University of California, Berkeley }   \\
      \affaddr{Berkeley, CA 94720-1776 }
          }
%
\maketitle

When compiled/previewed/rendered, this is the effect: enter image description here

(Source: http://www.acm.org/sigs/publications/sigfaq#a17)

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