How can I include the legends within the for loop and how can I set the xticks in MATLAB?

Question

Haitham AL Satai 2022-9-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1811940-how-can-i-include-the-legends-within-the-for-loop-and-how-can-i-set-the-xticks-in-matlab

评论： Haitham AL Satai 2022-9-25

I have below the following data

Q = [16,32,64,128,256,512,1024];
VEC_5 = [0.2380    0.2380    0.2380    0.2380    0.2380    0.2380    0.2380];    
VEC_10 = [1.1898    1.1898    0.2380    0.2380    0.2380    0.2380    0.2380];   
VEC_15 = [2.1416    2.1416    2.1416    1.1898    1.1898    0.2380    0.2380];   
VEC_20 = [4.9970    3.0934    2.1416    2.1416    2.1416    1.1898    1.1898];   
VEC_25 = [4.9970    4.9970    4.9970    3.0934    2.1416    2.1416    1.1898];  
VEC_30 = [8.8043    5.9488    4.9970    4.9970    3.0934    2.1416    1.1898];   
VEC_35 = [10.7079    8.8043    6.9007    4.9970    4.9970    2.1416    2.1416];  
VEC_40 = [14.5152   10.7079    8.8043    6.9007    4.9970    3.0934    2.1416];   
VEC_45 = [16.4188   11.6597   10.7079    8.8043    4.9970    4.9970    2.1416];   
VEC_50 = [19.2742   14.5152   10.7079    8.8043    5.9488    4.9970    2.1416];   
VEC_55 = [21.1779   16.4188   13.5634   10.7079    6.9007    4.9970    2.1416];   
VEC_60 = [23.5574   16.4188   14.5152   10.7079    8.8043    4.9970    2.6175]; 

I drew them with semilogx function in Matlab as shown below:

as demonstrated in the code below:

VEC = [VEC_5;VEC_10;VEC_15;VEC_20;VEC_25;VEC_30;VEC_35;VEC_40;VEC_45;VEC_50;VEC_55;VEC_60];
figure
cmap = jet(12);
hold on
for k = 1:12
  semilogx(Q,VEC(k,:), 'Color', cmap(k, :),'LineWidth',2,'MarkerEdgeColor','b');
end
hold off
xticks(Q)
xlabel('Q order');
ylabel('Coverage area');
legend('\theta_1_/_2 = 5','\theta_1_/_2 = 10','\theta_1_/_2 = 15','\theta_1_/_2 = 20','\theta_1_/_2 = 25','\theta_1_/_2 = 30','\theta_1_/_2 = 35','\theta_1_/_2 = 40','\theta_1_/_2 = 45','\theta_1_/_2 = 50','\theta_1_/_2 = 55','\theta_1_/_2 = 60')
grid on;

So, how can I include legends with the for loop instead of writing it outside? and the values in the x-axis are too close to each other how can I separate them to something like below? and how can I add markers on the lines?