Why legend something wrong

I got some sample codes from this

I am not sure why plotting some with wrong legends : (

clear;clc;close all;

h = [0.05	0.025	0.0125	0.00625	0.003125];
A = [0.0103	0.005	0.0019	0.0121	0.1031];
B = [0.0103	0.0052	0.0026	0.0012	0.0011];
C = [0.0103	0.0052	0.0026	0.0013	0.0011];

% Plot filtered data
figure();
%axis([0 3.5e-3 0 1e-3]);
loglog(h, A,'k-');  % plot
hold on;
scatter(h,A,'k','*');
loglog(h, B,'k--');
scatter(h,B,'k','d');
loglog(h, C,'k:');
scatter(h,C,'k','o');
xlabel('grid space [m]')
ylabel('Error Value');
title('Relation of Error Value and Grid Spacing [m]')
legend('A','B','C');
hold off;
grid on;

Answer 1

[Ameer Hamza]

No need to call loglog and scatter seperately. loglog() can do both

% clear;clc;close all;

h = [0.05	0.025	0.0125	0.00625	0.003125];
A = [0.0103	0.005	0.0019	0.0121	0.1031];
B = [0.0103	0.0052	0.0026	0.0012	0.0011];
C = [0.0103	0.0052	0.0026	0.0013	0.0011];

% Plot filtered data
figure();
%axis([0 3.5e-3 0 1e-3]);
loglog(h, A,'k-*');  % plot
hold on;
loglog(h, B,'k--d');
loglog(h, C,'k:o');
xlabel('grid space [m]')
ylabel('Error Value');
title('Relation of Error Value and Grid Spacing [m]')
legend('A','B','C');
hold off;
grid on;

Answer 2

[Alan Stevens]

Instead of

loglog(h, A,'k-');  % plot
hold on;
scatter(h,A,'k','*');


% simply use  

loglog(h, A, 'k*-');

% with the same for the others (i.e. no need for a separate scatter plot)
% then legend will work ok.