Using the DFT: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
Script for matlab: | Script for matlab: | ||
<pre> | |||
clear all; | clear all; | ||
t=0:.01:1; | t=0:.01:1; | ||
T=0.20; | T=0.20; | ||
ts=0:T:1; | ts=0:T:1; | ||
f1=2; | f1=2; | ||
f2=1/0.125; | f2=1/0.125; | ||
x = sin(2*pi*3*t); %this is the function | x = sin(2*pi*3*t); %this is the function | ||
plot(t,x); % plot the original signal | plot(t,x); % plot the original signal | ||
X = fft(x); % take the DFT | X = fft(x); % take the DFT | ||
pause (2); | pause (2); | ||
plot (t,X); %plot the DFT of the signal | plot (t,X); %plot the DFT of the signal | ||
</pre> | |||
Revision as of 11:50, 12 November 2007
sampling and taking the DFT we get this graph:
Script for matlab:
clear all; t=0:.01:1; T=0.20; ts=0:T:1; f1=2; f2=1/0.125; x = sin(2*pi*3*t); %this is the function plot(t,x); % plot the original signal X = fft(x); % take the DFT pause (2); plot (t,X); %plot the DFT of the signal