matlab 多参数积分工具箱 multivariable calculus toolbox

				function D=div(vars,Fx,Fy,Fz)
				%DIV  Divergence of a vector field.
				%   D = DIV(V) returns the divergence of a vector field V
				%   where V has the type vector and D has the type scalar.
				%
				%   See also GRAD, CURL, LAPL.
				
				% Copyright (c) 2001-04-13, B. Rasmus Anthin