[R] Hidden line algorithms and a different kind of waterfall

From: Carl Witthoft <carl_at_witthoft.com>
Date: Sat, 01 Nov 2008 19:11:43 -0400


This is not the same as the recent thread on a waterfall graph.

I'm thinking about the rolling FFT display used in acoustics and other spectrum analysis tasks.

Here's an example of a very fancy 3-D waterfall display:

http://www.ultimaserial.com/UltimaWaterfall.html

I was just wondering if there are any simple hidden-line tools in R that I could use to draw simple waterfall displays. Basically, I'd like to plot a time-series of FFTs (or equivalent) and use hidden-line tools to produce a clean-looking graph.

I know I could hack it using polygon() , where I'd plot c({the FFT}, {line on bottom of graph}) starting at the top of the graph and working down, but wondered if there were any other tools.

thanks
Carl



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