Fseries.m
上传用户:loeagle
上传日期:2013-03-02
资源大小:1236k
文件大小:1k
- function xx=fseries(funfcn,a,b,n,tol,p1,p2,p3)
- %FSERIES Returns the Fourier series coefficients.
- % XX=FSERIES(FUNFCN,A,B,N,TOL,P1,P2,P3)
- % funfcn=the given function, in an m-file.
- % It can depend on up to three parameters
- % p1,p2, and p3. The function is given
- % over one period extending from 'a' to 'b'
- % xx=vector of length n+1 of Fourier Series
- % Coefficients, xx0,xx1,...,xxn.
- % p1,p2,p3=parameters of funfcn.
- % tol=the error level.
- j=sqrt(-1);
- args0=[];
- for nn=1:nargin-5
- args0=[args0,',p',int2str(nn)];
- end
- args=[args0,')'];
- t=b-a;
- xx(1)=eval(['1/(',num2str(t),').*quad(funfcn,a,b,tol,[]',args]) ;
- for i=1:n
- new_fun = 'exp_fnct' ;
- args=[',', num2str(i), ',', num2str(t), args0, ')' ] ;
- xx(i+1)=eval(['1/(',num2str(t),').*quad(new_fun,a,b,tol,[],funfcn',args]);
- end
-