matlab的一些二重积分的小程序问题

来源：百度知道 编辑：UC知道 时间：2024/07/07 10:03:04
各位大侠高人，请教一个matlab的问题。书上说了低版本的matlab软件里都有所谓的二重积分小程序dblquad2、dbl_itg等，可我的matlab软件版本不算低，就找不到这样的小程序，装了7.04版本的也没有，不知怎么回事，安装了几次，怎样设置都一样。请教一些高人，先谢谢了。

>> help dblquad
DBLQUAD Numerically evaluate double integral.
Q = DBLQUAD(FUN,XMIN,XMAX,YMIN,YMAX) evaluates the double integral of
FUN(X,Y) over the rectangle XMIN <= X <= XMAX, YMIN <= Y <= YMAX. FUN
is a function handle. The function Z=FUN(X,Y) should accept a vector X
and a scalar Y and return a vector Z of values of the integrand.

Q = DBLQUAD(FUN,XMIN,XMAX,YMIN,YMAX,TOL) uses a tolerance TOL instead
of the default, which is 1.e-6.

Q = DBLQUAD(FUN,XMIN,XMAX,YMIN,YMAX,TOL,@QUADL) uses quadrature
function QUADL instead of the default QUAD.
Q = DBLQUAD(FUN,XMIN,XMAX,YMIN,YMAX,TOL,MYQUADF) uses your own
quadrature function MYQUADF instead of QUAD. MYQUADF is a function
handle. MYQUADF should have the same calling sequence as QUAD and
QUADL. Use [] as a placeholder to obtain the default value of TOL.

Example:
Integ