function quad=gauss(f,a,b,A,W)%Input   - f is the integrand input as a string 'f'%        - a and b upper and lower limits of integration%        - A is the 1 x N vector of abscissas from Table 7.9%        - W is the 1 x N vector of weights from Table 7.9%Output  - quad is the quadrature value%  NUMERICAL METHODS: Matlab Programs% (c) 2004 by John H. Mathews and Kurtis D. Fink%  Complementary Software to accompany the textbook:%  NUMERICAL METHODS: Using Matlab, Fourth Edition%  ISBN: 0-13-065248-2%  Prentice-Hall Pub. Inc.%  One Lake Street%  Upper Saddle River, NJ 07458N=length(A);T=zeros(1,N);T=((a+b)/2)+((b-a)/2)*A;quad=((b-a)/2)*sum(W.*feval(f,T));