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: get_problem.m
    path of file: ./repos/SuiteSparse/CXSparse/MATLAB/Demo/private
    
    the code of the file until where you have to start completion: function [C, sym] = get_problem (prefix, name, tol)
% [C, sym] = get_problem(prefix, name,tol)
% read a problem from a file, drop entries with abs value < tol
% tol defaults to zero if not present
%
% Example:

    
function [C, sym] = get_problem (prefix, name, tol)
% [C, sym] = get_problem(prefix, name,tol)
% read a problem from a file, drop entries with abs value < tol
% tol defaults to zero if not present
%
% Example:
%    [C, sym] = get_problem ('', 'west0067') ;
% See also: cs_demo

% CXSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved.
% SPDX-License-Identifier: LGPL-2.1+

fprintf ('\n------------------- Matrix: %s\n', name) ;

if (nargin < 2)
    tol = 0 ;
end