Waterfall plot

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A waterfall plot is a three-dimensional plot in which multiple curves of data, typically spectra, are displayed simultaneously. Typically the curves are staggered both across the screen and vertically, with 'nearer' curves masking the ones behind. The result is a series of "mountain" shapes that appear to be side by side. The waterfall plot is often used to show how two-dimensional information changes over time or some other variable such as rpm. The term "waterfall plot" is sometimes used as a synonym of "spectrogram" or "Cumulative Spectral Decay" (CSD) plot.


Waterfall plots are often used to show the:

Instantaneous spectrum and a waterfall plot in the FM radio broadcast band showing three strong local stations; speech and music show different patterns of frequency vs. time. In the waterfall plot, frequency is plotted across the screen, time is represented by vertical distance down the screen, and the amplitude of the signal is represented by color; higher amplitude is red, low amplitude blue.

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