title: Using a logarithmic (floating point) increment in a bash loop
body: <p>I have this bash script that basically run a c simulation <code>./infosimul mu num</code></p>
  
  <p>where the parameters increase linearly and they take just integers.</p>
  
  <pre><code>mu=1
  num=0
  while test $num -le 6;do
      mkdir $num
      cd $num
      while test $mu -le 200; do
              ../infosimul "$num" "$mu" 
              mu=$((mu+3))
          done
      mu=1
      cd ../
      num=$((num+1))
  done
  </code></pre>
  
  <p>I would like that the mu parameter increase in a set like 0.01, 0.03, 0.09, 0.1, 0.3, 0.9, 1, 3, 9 ,10  or something that is not purely a sequence of integers.</p>
  
  <p>Thanks!</p>