[R] using R interactively

[Peter Dalgaard BSA]

"Terry J. Westley" <twestley at buffalo.veridian.com> writes:

> 1) Is it possible to erase data points, legends, and/or text
>    from an R plot?

Unfortunately no. R is still pretty much stuck in the old hardcopy
device model. Not that we wouldn't want something smarter, but the
changes would be pretty pervasive.

> 2) What's the best way to find the closest data point to
>    what locator() returns?

identify()

> 3) Also, has anyone implemented anything like buttons or pull-down
>    menus so that I could implement other functions?  I'm using
>    Tcl/Tk to control this application but I would prefer that, once
>    the plot is displayed, the user doesn't have to go back to another
>    window to invoke other functions (such as Quit).

Guido Masarotto did a sketchy, but rather neat Tcl/Tk <-> R glue
package at some point. Doesn't work with some linuxen if one uses
international charset, but you probably couldn't care less about
that... 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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