gusucode.com > symbolic工具箱matlab源码程序 > symbolic/@single/kummerU.m
function y = kummerU(a,b,x) %KUMMERU Kummer's confluent hypergeometric U function. % U = kummerU(a,b,x) computes the value of Kummer's U function % U = 1/gamma(a) * int(exp(-x*t)*t^(a-1)*(1+t)^(b-a-1),t,0,inf). % % Reference: % [1] Abramowitz, Milton; Stegun, Irene A., eds., "Chapter 13", % Handbook of Mathematical Functions with Formulas, Graphs, and % Mathematical Tables, New York: Dover, pp. 504, 1965. % Copyright 2014 The MathWorks, Inc. y = sym.useSymForNumeric(@kummerU, a, b, x); end