# Documentation of diff_angle_xy

Global Index (all files) (short | long) | Local Index (files in subdir) (short | long)

## Function Synopsis

    diff=diff_angle_xy (v1,v2)

## Help text

     Purpose: compute the angle difference in degres between 2 row vectors
     with their xy components

     Variables:
    	-  v1,v2 : vectors of row vectors of components (needed):
     v1 (x1   y1   v2 (x1	y1
         x2   y2       x2  y2
         .    .        .   .
         .    .)       .   .)

    	- diff: vector of angle difference in degres

     Global variables: none

## Cross-Reference Information

| This function is called by
--- | ---
| heading_figure stick_plot_figure

Pierre-Michel THEVENY <theveny@dt.insu.cnrs.fr>