Using the DFT: Difference between revisions
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Script for matlab: |
Script for matlab: |
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<pre> |
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clear all; |
clear all; |
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t=0:.01:1; |
t=0:.01:1; |
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T=0.20; |
T=0.20; |
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ts=0:T:1; |
ts=0:T:1; |
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f1=2; |
f1=2; |
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f2=1/0.125; |
f2=1/0.125; |
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x = sin(2*pi*3*t); %this is the function |
x = sin(2*pi*3*t); %this is the function |
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plot(t,x); % plot the original signal |
plot(t,x); % plot the original signal |
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X = fft(x); % take the DFT |
X = fft(x); % take the DFT |
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pause (2); |
pause (2); |
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plot (t,X); %plot the DFT of the signal |
plot (t,X); %plot the DFT of the signal |
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</pre> |
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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