MATLAB Answers

How to optimize this program using a for loop?

1 view (last 30 days)
clear
close
clc
x=linspace(-5,5,1000);
y = sin(x.^2).*cos(x.^2);
fx = exp(-x.^2);
fm1 = ifft(fft(fx)/norm(fx).*y);
figure(1)
plot(abs(fm1))
fm2 = ifft(fft(fm1)/norm(fm1).*y);
figure(2)
plot(abs(fm2))
fm3 = ifft(fft(fm2)/norm(fm2).*y);
figure(3)
plot(abs(fm3))
fm4 = ifft(fft(fm3)/norm(fm3).*y);
figure(4)
plot(abs(fm4))
fm5 = ifft(fft(fm4)/norm(fm4).*y);
figure(5)
plot(abs(fm5))
fm6 = ifft(fft(fm5)/norm(fm5).*y);
figure(6)
plot(abs(fm6))

Accepted Answer

jgg
jgg on 14 Jul 2016
As far as I can tell, you're just doing this:
fm1 = ifft(fft(fx)/norm(fx).*y);
figure(1)
plot(abs(fm1))
fm2 = ifft(fft(fm1)/norm(fm1).*y);
several times. So, just replacing that latter section of your code with a loop should work:
fm = ifft(fft(fx)/norm(fx).*y);
figure(1)
plot(abs(fm))
for i = 2:6
fm = ifft(fft(fm)/norm(fm).*y);
figure(i)
plot(abs(fm))
end
  1 Comment
David Zarate Villegas
David Zarate Villegas on 14 Jul 2016
the thing is that I use the previous calculated term, I use fm2 to calculate fm3, and fm3 to calculate fm4, and so on, does your code works with that change?

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!