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: test15.m
    path of file: ./repos/SuiteSparse/CSparse/MATLAB/Test
    
    the code of the file until where you have to start completion: function test15
%TEST15 test cs_amd
%
% Example:
%   test15
% See also: testall

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

rand ('state', 0) ;
randn ('state', 0) ;
clf

for trials = 1:100
    n = fix (200 * rand (1)) ;
    d = 0.05 * rand (1) ;
    A = sprandn (n, n, d) ;

    
function test15
%TEST15 test cs_amd
%
% Example:
%   test15
% See also: testall

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

rand ('state', 0) ;
randn ('state', 0) ;
clf

for trials = 1:100
    n = fix (200 * rand (1)) ;
    d = 0.05 * rand (1) ;
    A = sprandn (n, n, d) ;

    % add a randomly placed dense column
    k = fix (n * rand (1)) ;
    k = max (1, k) ;
    k = min (n, k) ;
    A (:,k) = 1 ;

    try
        p0 = amd (A) ;
    catch
        p0 = symamd (A) ;
    end