The plot thickens - Solution
The probability density function of the normal or Gaussian distribution, is:y(t)=(1/(sigma*(2*pi)^0.5))*e^(-0.5*((t-mu)/sigma)^2)
where mu is the mean and sigma the standard deviation.
y(t) and amplitude spectrum with mu=0 sigma=0.05
y(t) and amplitude spectrum with mu=0 sigma=0.1
y(t) and amplitude spectrum with mu=0 sigma=0.5
Notice that the spread of frequencies has narrowed as as the spread of the original function has increased.
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Versions will shortly be available for iOS and Windows.
plotXpose app is a companion to the book Mathematics for Electrical Engineering and Computing by Mary Attenborough, published by Newnes, 2003.