[R] hist2d() function in R?

[Peter Dalgaard BSA]

Aleksey Naumov <naumov at acsu.buffalo.edu> writes:

> Dear R users,
> 
> I am just starting with R (v. 1.0.0) and I use Vehables & Ripley's
> MASS book for examples.
> In the intro session, there is an example of a 2D histogram on an 8x8
> grid:
> 
> x <- rnorm(1000)
> y <- rnorm(1000)
> contour(hist2d(x,y,,,8,8))
> 
> R complains:
> 
> Error in contour(hist2d(x, y, , , 8, 8)) :
>         couldn't find function "hist2d"
> 
> I looked for hist2d() in the manual (including the latest development
> version), but didn't
> find it. Is there such a function or a suitable substitute?

I don't have V&R with me, but does this look somewhat right?

contour(table(cut(x,pretty(x,8)),cut(y,pretty(y,8))))

[of course the table() construction won't actually plot a 2d histogram...]

-- 
   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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