Mean and effective value of a function over one period
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Randy Marsh
on 25 Apr 2017
Commented: Star Strider
on 25 Apr 2017
How to compute mean and effective value of a function s(t)=2cos(2pi*f*t) for f=5Hz over one period, with discretization step 0.001?
Code for plotting discrete function:
t=0:.001:.25; %random interval
x=2*cos(2*pi*5*t);
stem(x);
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Accepted Answer
Star Strider
on 25 Apr 2017
The ‘mean’ value is just that:
mean_x = mean(x);
I don’t know what you intend by ‘effective value’. If you mean RMS, it’s the square root of the mean of the squared value of the signal:
RMS_x = sqrt(mean(x.^2));
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Star Strider
on 25 Apr 2017
I don’t have the DSP System Toolbox, so if it’s necessary to use it to find out what’s wrong, I can’t.
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