정의:
특성:
기본함수:(matlab 내장)
function y=diric(x,N)
error(nargchk(2,2,nargin,'struct'));
if round(N) ~= N || N < 1 || numel(N) ~= 1,
error(generatemsgid('MustBePosInteger'),'Requires N to be a positive integer.');
end
y=sin(.5*x);
i=find(abs(y)>1e-12); % set where x is not divisible by 2 pi
j=1:length(x(:));
j(i)=[]; % complement set
y(i)=sin((N/2)*x(i))./(N*y(i));
y(j)=sign(cos(x(j)*((N+1)/2)));
그래프:
t=[-3*pi:0.01:3*pi];
y=5*diric(t,5);y2=11*diric(t,11);
hold on
plot(t,y,'b-'), plot(t,y2,'r')
axis([-3*pi,3*pi,-5,12]), title('Dirichlet Kernel Function'), grid on
legend('diric(t,5)','diric(t,11)')
hold off
DOWNRG 