average value of a half wave rectified sine curve

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priya 2019-12-22

评论： Star Strider 2019-12-22

I have a half wave rectified sine wave. I want to calculate the average of this curve on matlab and plot it. Please help.

f = @(t) sin(t).*(sin(t)>=0) + 0*(sin(t)<0);

t = linspace(0, 4*pi);

plot(t, f(t))

Star Strider 2019-12-22

This is straightforward:

syms f t t0 t1 
halfwave(f,t0,t1) = int(sin(2*pi*f*t), t, t0, t1/2)/(t1 - t0)
numericvpa = vpa(halfwave(1,0,1))

producing:

To do it numerically, use the mean function to calculate the mean.

Note that the Root-Mean-Square value:

RMS = sqrt(mean(f(t).^2))

is more meaningful, since that is the D-C equivalent.

priya 2019-12-22

This is fine. Thank you.

Star Strider 2019-12-22

As always, my pleasure!

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