R help - Mar 2005 - Aid with 3-D scatterplots

I am attempting to classify pixels from a Landsat image by using their 
associated numbers in bands 2, 3, and 4 (It's from an assignment on 
classification).  To aid me, I want to create a 3-D scatterplot using 
the "cloud" command.  Due to my ignorance of the finer plotting 
functions, I am unable to display the scale on the three axes or to 
display the grid.

My dataframe (RS) contains four columns: Class, band2, band3, band4.  
Class is the classification variable (vegetation, water, soil, etc.)

The basic code I used was:
cloud(band4~band2*band3,RS,xlab="TM Band 2",ylab="TM Band
3",zlab="TM
Band 4",group=RS$Class).

Unfortunately, I'm unsure which arguments to use and how to write them 
in.  I've tried adding arguments using "scale", but have not been 
successful, mostly because I'm unsure which arguments apply.  The scale 
I want for all three axes is 0-100.

Thank you for any help.

Jim Milks

On Wednesday 09 March 2005 13:17, Jim and Chana Milks
wrote:
> I am attempting to classify pixels from a Landsat image by using their
> associated numbers in bands 2, 3, and 4 (It's from an assignment on
> classification).  To aid me, I want to create a 3-D scatterplot using
> the "cloud" command.  Due to my ignorance of the finer plotting
> functions, I am unable to display the scale on the three axes or to
> display the grid.
>
> My dataframe (RS) contains four columns: Class, band2, band3, band4.
> Class is the classification variable (vegetation, water, soil, etc.)
>
> The basic code I used was:
> cloud(band4~band2*band3,RS,xlab="TM Band 2",ylab="TM Band
3",zlab="TM
> Band 4",group=RS$Class).
Just 'groups = Class' should work.
>
> Unfortunately, I'm unsure which arguments to use and how to write them
> in.  I've tried adding arguments using "scale", but have not
been
> successful, mostly because I'm unsure which arguments apply.  The scale
> I want for all three axes is 0-100.
You want 

cloud(..., xlim = c(0, 100), ylim = c(0, 100), zlim = c(0, 100))

and perhaps 
 
cloud(..., xlim = c(0, 100), ylim = c(0, 100), zlim = c(0, 100), 
      scales = list(arrows = FALSE))

-Deepayan