[R] why doesn't ifelse work ?

eric ericstrom at aol.com
Fri Apr 29 04:58:37 CEST 2011

from the console ...

> table(signal)
   0    1 
1286 3885 

note there is no -1 value.

This is consistent with what I see if if plot(signal). When I issue that
statement from the console, I see signal vary between 0 and 1.0 but it never
goes to - 1

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