You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: VBA_ExceedanceProb.m
    path of file: ./repos/PsPM/src/ext/VBA
    
    the code of the file until where you have to start completion: function ep = VBA_ExceedanceProb(mu,Sigma,form,verbose)
% calculates the exceedance probability for mutivariate Gaussian variables
% function ep = VBA_ExceedanceProb(mu,Sigma)
% IN:
%   - mu/Sigma: sufficient statistics of the pdf

    
function ep = VBA_ExceedanceProb(mu,Sigma,form,verbose)
% calculates the exceedance probability for mutivariate Gaussian variables
% function ep = VBA_ExceedanceProb(mu,Sigma)
% IN:
%   - mu/Sigma: sufficient statistics of the pdf
%       -> if form='gaussian': mu=E[x] and Sigma=V[x]
%       -> if form='dirichlet': mu=Dirichlet counts and Sigma is unused
%   - form: 'gaussian' or 'dirichlet'
% OUT:
%   - ep: vector of exceedance probabilities, i.e. the probability, for
%   each variable, to be greater than all the other ones.

try, form; catch, form = 'gaussian'; end