How to get the out degree of trees?

tree = [0  1  2  2  2  2  2  1  8  8  1  11  11  1  14];

C=children(tree);

treeplot(tree);

count = size(tree,2); 
[x,y] = treelayout(tree); 

x = x'; 
y = y'; 
name1 = cellstr(num2str((1:count)')); 
text(x(:,1), y(:,1), name1, 'VerticalAlignment','bottom','HorizontalAlignment','right');
title({'Level Lines'},'FontSize',12,'FontName','Times New Roman');

why the one in bold doesn't work?

Answer 1

[Walter Roberson]

Your "tree" variable is not a classregtree as is required for the children() function. See http://www.mathworks.com/help/toolbox/stats/classregtree.children.html

[jy tan]

then how should i modify the above code to get the outdegrees of a node

how do i refer to a certain node in a tree,eg referring certain element in array, using B(3)

[Walter Roberson]

Once the tree is a classregtree, then

C = children(TheClassRegTree);

outdegree = sum(C~=0,2);

and outdegree for node #3 would be outdegree(3) with the children of node #3 being C(3,:)

In order to create a classregtree you need both a predictor and a response. You appear to be missing one of those two.

http://www.mathworks.com/help/toolbox/stats/classregtree.html

[jy tan]

i still dont get it, how do u initialise a classregtree

what is the meaning of X and y

t = classregtree(X,y)

t = classregtree(X,y,'Name',value)