el_areas4

(./mat4/el_areas4.m)

Function Synopsis

ineg=el_areas4(e,x,y)

Help text

EL_AREAS4 - compute triangular finite element areas
   EL_AREAS4(e,x,y) computes the areas for the elements 
   defined by the element list (e) and the node coordinates
   (x,y).  The areas are NOT returned to the workspace, but
   instead are stored globally in AR.  An index of element
   numbers whose areas are negative (if any) are returned.
   Negative element areas indicate clockwise elemental
   node numbering, instead of the conventional counter-
   clockwise numbering.

 Call as:   >> ineg=el_areas4(e,x,y);

 Written by : Brian O. Blanton (October 95)

Cross-Reference Information

genbel4        ./mat4/genbel4.m