Sinusoid with Changing Amplitude and Frequency

$$doppler(x) = \sqrt{x(1 - x)} \sin\left(\frac{2.1\pi}{x+0.05}\right)$$

data(doppler)

Format

A vector containing 512 observations.

Source

S+WAVELETS.

References

Bruce, A., and H.-Y. Gao (1996) Applied Wavelet Analysis with S-PLUS, Springer: New York.