function [u,v] = polar2uv(dir,spd)

%  polar2uv:  (east, north) currents of direction and speed
%
%       u is eastward current component
%       v is northward current component
%       dir is compass direction of current
%             (90 for eastward flow, 270 for westward)
%       spd is magnitude of current
%
%       Fran Hotchkiss, February 20, 1998.


%%% START USGS BOILERPLATE -------------% There is no published documentation for these programs- use the 
%  internal comments and help function.
% Programs written in Matlab- as early as 7.2.0.232 (R2006a) and 
% most recent modifications in  v7.8.0 (R2009a)
% Programs ran on PC with Windows XP Professional OS, and RHEL4 linux.
%
% "Although this program has been used by the USGS, no warranty, 
% expressed or implied, is made by the USGS or the United States 
% Government as to the accuracy and functioning of the program 
% and related program material nor shall the fact of distribution 
% constitute any such warranty, and no responsibility is assumed 
% by the USGS in connection therewith."
%%% END USGS BOILERPLATE --------------

 
dir = dir .* pi ./180.;
[v,u] = pol2cart(dir,spd);