Update: 1st March 2019
Version of function                Changes 
function PSAprob                   function revised to accomodate use whether or not computational difficulties mentioned in README.txt occur
function PSAprob_v2                function removed as now redundant



Date: Date of Publication
Version of function                Changes 
function PSAprob                   original function used in tutorial paper
function PSAprob_v2                updated to accomodate use when none of the computational difficulties mentioned in README.txt occur


