﻿功能:特殊函数之Dawson函数

格式:Dawson(x)

说明:x为数据或者矩阵,x里每个变量的值的绝对值不能大于26.55,因为那个时候数据非常大,实际已经没有什么意义.其实本函数={Sqrt<矩阵运算\sqrt>}(pi)/2*{Erfi<矩阵运算\erfi>}(x)/{Exp<矩阵运算\exp>}(x^2)

关于:{Dawson<http://mathworld.wolfram.com/DawsonsIntegral.html>}

例子:

a =
[ 2.24824141350027     4.69896581708405     9.33396242062280     9.79829008215959
  5.60064846444905     4.14577686420911     2.86656350030869     6.62931059330204
  4.02299834136991     2.16328503664736     1.90970456316588     1.49694948061227
  2.09304019440573     9.60455997828607     5.99720912799109     9.75259971327735 ]

b=dawson(a)//执行本命令后返回如下结果
b =
[ 0.25682623601886     0.10900190483755     0.05388069619207     0.05129933600854
  0.09077262957597     0.12447668044289     0.18814412259573     0.07631182037215
  0.12855316866210     0.27065728636184     0.32077871659414     0.42911768204776
  0.28317002567632     0.05234549102702     0.08458321057902     0.05154226008969 ]

//By 2012/09/08