GSCATTER scatter plot of groups 

  gscatter(x,y,group)
  gscatter(x,y,group,clr,sym,siz)
  gscatter(x,y,group,clr,sym,siz,doleg)
  gscatter(x,y,group,clr,sym,siz,doleg,xname,yname)
  h = gscatter(...) 

  x,y, group: 	vectors with equal length 
  clf: 	color vector, default 'bgrcmyk'
  sym:		symbol, default '.'
  siz: 	size of Marker
  doleg:  'on' (default) shows legend, 'off' turns of legend 
  xname, yname: name of axis


 see also: ecdf, cdfplot

 References: 

Package: nan