counting length of lines with categories=x

[Darrell McCauley]

> Date: Wed, 5 Aug 92 05:38:47 -0500
> From: nps!pns at cerl.cecer.army.mil
> Apparently-To: grassu-list at zorro.cecer.army.mil
> 
> Does any one know of a way to calculate the total length of all lines within
> user specified categories, in a vector map.

Was this ever addressed? I have a program half-written which will
give the perimeter of all areas with a specified category. 

 v.catcount vect=vector_map c=1

Would this help (if your problem is not already solved)?

--Darrell