You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tribal1.m
    path of file: ./repos/jigsaw-matlab/tools/orthoball
    
    the code of the file until where you have to start completion: function [bb] = tribal1(pp,ee)
%TRIBAL1 compute the circumballs associated with a 1-simplex

    
function [bb] = tribal1(pp,ee)
%TRIBAL1 compute the circumballs associated with a 1-simplex
%triangulation embedded in R^2 or R^3.
%   [BB] = TRIBAL1(PP,EE) returns the circumscribing balls
%   associated with the edge segments in [PP,EE], such that
%   BB = [XC,YC,RC.^2].

%   Darren Engwirda : 2017 --
%   Email           : d.engwirda@gmail.com
%   Last updated    : 02/05/2018

    bb = pwrbal1(pp,zeros(size(pp,1),1),ee) ;

end