How to make multiple sinc functions?
显示 更早的评论
Hi, I found out from the forum that this is the code for generating one sinc function,
x = -5:.01:5;
plot(x,sinc(x))
Now, can I do multiple of these, like one after the other? But I need to change the frequency after every sinc cycle, is it possible? it will be like a chirp wave with sinc function. Any help will be appreciated, thanks.
回答（2 个）
Image Analyst
2013-5-18
Do you mean like this:
x = -5:.01:5;
plot(x,sinc(x))
hold on
plot(x, sinc(x/3), 'r-');
plot(x, sinc(x/0.25), 'g-');
2 个评论
Rohan Repale
2013-5-18
编辑：Rohan Repale
2013-5-18
Image Analyst
2013-5-18
Just shift the x, like this:
x = -5:.01:5;
plot(x,sinc(x))
hold on
plot(x, sinc((x-2)/3), 'r-');
plot(x, sinc((x-4)/0.25), 'g-');
Youssef Khmou
2013-5-18
hi,
Try the code provided by Image analyst, or try also this version :
% different positions for peaks
x = -5:.01:5;
center=[-2:0.2:2];
for n=1:21
M(:,n)=sinc(x-center(n));
end
plot(M)
3 个评论
Rohan Repale
2013-5-18
编辑：Rohan Repale
2013-5-18
Youssef Khmou
2013-5-18
编辑：Youssef Khmou
2013-5-18
ok Rohan, in this case you need to enlarge the support axis try :
x=-30:0.1:30;
center=[-20:4:20];
for n=1:length(center)
M(:,n)=sinc(x-center(n));
end
plot(x,M), grid on,
If you want more separating distance, you can change the step in vector "center" from 4 to n>4 .
Image Analyst
2013-5-18
sinc goes on forever, at least the theoretical formula for it because it's based on the sine function which goes on forever. Please say what criteria you want to use to decide where the sinc function "ends".
类别
在 帮助中心 和 File Exchange 中查找有关 Convert Image Type 的更多信息
产品
2013-5-18
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
