Plot a matrix of neighbourhood graphs.
# S4 method for kcca
pairs(x, which=NULL, project=NULL, oma=NULL, …)An object of class "kcca"
Index numbers of dimensions of (projected) input space to plot, default is to plot all dimensions.
Projection object for which a predict method
    exists, e.g., the result of prcomp.
Outer margin.
Passed to the plot method.
This works only for "kcca" objects, no method is available for
  "kccasimple" objects.