%
%   FISHSTORY_EQNS.M   Function file for solution of the "Fish Story" example
%
%   This file simply evaluates yp = f(x,y) for the input x and y values.
%   For this problem:  x -> time   and   y -> fish population
%
%   File prepared by J. R. White, UMass-Lowell (last update Jan. 2003)
%
      function yp = eqnfile(x,y)
      global kk
      yp = kk*sqrt(y);
%
%   end of function
