nction [mu_log,sigma_log] = lognormal_normal2log(mu,sigma,convention) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
<div class="fragment"><pre class="comment"> function [mu_log,sigma_log] = lognormal_normal2log(mu,sigma,convention)

 convert characteristics of log-normal random variable  X 
 into mean and std dev of random variable Y = log(X)
 characteristics are given by:
  convention 'arithmetic': mean and std dev
  conv