VLFeat - Documentation > vl_demo_kdtree_plot

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Documentation> vl_demo_kdtree_plot

# Source code for ``vl_demo_kdtree_plot.m

This file is located in the ``toolbox/demo folder in VLFeat package.

    function h = vl_demo_kdtree_plot(kdtree, nodeIndex, xlim, ylim)
    % VL_DEMO_KDTREE_PLOT

    % Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson.
    % All rights reserved.
    %
    % This file is part of the VLFeat library and is made available under
    % the terms of the BSD license (see the COPYING file).

    dim        = kdtree.nodes.splitDimension(nodeIndex) ;
    thresh     = kdtree.nodes.splitThreshold(nodeIndex) ;
    lowerChild  = kdtree.nodes.lowerChild(nodeIndex) ;
    upperChild = kdtree.nodes.upperChild(nodeIndex) ;

    if dim == 1
      xs = [thresh, thresh] ;
      ys = ylim ;
      ylimLower = ylim ;
      ylimUpper = ylim ;
      xlimLower = [xlim(1) thresh] ;
      xlimUpper = [thresh xlim(2)] ;
    else
      xs = xlim ;
      ys = [thresh, thresh] ;
      xlimLower = xlim ;
      xlimUpper = xlim ;
      ylimLower = [ylim(1) thresh] ;
      ylimUpper = [thresh ylim(2)] ;
    end
    h = line(xs,ys) ;

    if lowerChild > 1
      h = [h vl_demo_kdtree_plot(kdtree, lowerChild, xlimLower, ylimLower)] ;
    end

    if upperChild > 1
      h = [h vl_demo_kdtree_plot(kdtree, upperChild, xlimUpper, ylimUpper)] ;
    end