- x
- an object to be plotted, e.g. a data frame or a data matrix 
  
- parts
- the variables in the rmult object to be plotted 
  
- ...
- additional plotting parameters as described in
        
    - rgl::material3d
 
  
- center
- logical, center the data? This might be necessary to
    stay within the openGL-arithmetic used in rgl. 
  
- scale
- logical, scale the data? This might be necessary to
    stay within the openGL-arithmetic used in rgl. 
  
- add
- logical, adding  or new plot 
  
- bbox
- logical, whether to add a bounding box 
  
- axes
- logical, whether to plot a coordinate cross 
  
- cex
- size of the plotting symbol (as expanding factor) 
  
- vlabs
- labels for the variables 
  
- size
- size of the plotting symbol, only size or cex should be used 
  
- col
- the color used for dots, defaults to black.