/>
When it is evaluated, this calls the intrinsic function Dtime and sets the value to the delta-CPU-time since the last evaluation of this symbol (with SHOW SYMBOL, or with an evaluation of ($DELTA_CPU) ). It is called and set to zero Ferret initializes, so the first evaluation gets delta-cpu time since the start of the Ferret session. See examples below</p>
<pre>
&gt;ferret
 NOAA/PMEL TMAP
 FERRET v6.2 
 Linux(g77) 2.4.21-32 - 05/06/09
 14-May-09 15:44 

yes? show symbols ! several symbols are set at star