[R] noisy quantisation

William Simpson william.a.simpson at gmail.com
Tue May 5 11:23:10 CEST 2009

The following creates a point process version of a sinewave (maybe
there's a better way):

p<-amp*cos(2*pi*freq*(1:n)/n ) + 0.5

I get something like this:

1        o    oo oo    o  o    ooooo     o

0   ooo o      o     o o o              ooo ooo

In case it's not obvious, this is a noisy version of
1              ooooooo            ooooooo

0  ooooooo            ooooooo

I was wondering if anyone can suggest a way to create a version where
I get 0s, 1s, and 2s something like a noisy version of this:

2                 oooooooo                         oooooo

1            ooooo          ooooo         ooooo

0  ooooooo                        oooooooo

I am looking for a version of the top graph except with 3 levels instead of 2.

Thanks very much for any help


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