﻿功能:产生一个随机带状矩阵

格式:bandsym(n,h,value)

说明:产生一个n阶的半带宽为h的带状矩阵(随机产生),其矩阵里的元素值介于0与value之间.value可正可负

例子:

bandsym(6,2,10)//回车得到如下结果
ans =
 [ 9.32976039560966   6.40461693816102   9.65627591109661   0                  0                   0
   6.40461693816102   6.27276046959346   5.12184203375217   4.7759920101501    0                   0
   9.65627591109661   5.12184203375217   7.63762913999969   3.28706725187929   0.0807569502297588  0
   0                  4.7759920101501    3.28706725187929   8.19444495634848   9.23805899882599    2.03753459362198
   0                  0                  0.0807569502297588 9.23805899882599   7.16491729354715    3.28224923614517
   0                  0                  0                  2.03753459362198   3.28224923614517    9.61268875264222]