sorting is not sorting?!

Using command sortrows(x,n) and it is not working? Any help would be appreciated please! Trying to sort column 3 in ascending order. My sort command is 2nd line to the last.

Thank you!

disp('   Test Scores by Student ID#');
disp('         ');
disp('    ID#   T1    T2    T3');
disp(exam_scores);
student_5=exam_scores(5,:);
test_1=exam_scores(:,2);
test_2=exam_scores(:,3);
test_3=exam_scores(:,4);
test_scores=[test_1,test_2,test_3];
disp('          ');
disp('Student 5');
disp(student_5);
disp('       ');
disp('Test #1');
disp(test_1);
disp('       ');
disp('Standard Deviation for each test:');
std=std(test_scores);
disp(std);
disp('     ');
disp('Variance for each test:');
variance=(var(test_scores));
disp(variance);
disp('       ');
sum=sum(test_scores,2);
round_sum=round(sum);
possible_points=300;
students_score=(round_sum./possible_points);
percentage=(students_score.*100);
student_id=exam_scores(:,1);
table=[student_id,sum,percentage];
y=round(table);
disp('    ID#  Pts    %');
sortrows(y,3);
disp(y);

Answer 1

[dpb]

sortrows(y,3);

is a no-op because you didn't save the result.

y=sortrows(y,3);

[azaandria]

Thank you so much!