How to combine a marker to a line and show in legend?

Question

Ashvinder Singh Gill Surmaish Singh Gill 2020-6-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/547151-how-to-combine-a-marker-to-a-line-and-show-in-legend

移动：Voss 2023-12-20

diametercyclic1.xlsx

How do I combine the markers and line plot for the case below? Example : Magenta arteisk on the green line to be shown in the legend and subsequently.

data = xlsread("diametercyclic1.xlsx") ; 
%K = data(1,[1 3 5 7]) ;   % factors 
%data(1,:) = []; 
s1 = data(1:132,1) ; f1 = data(1:132,2) ;  
s2 = data(1:38,3) ; f2 = data(1:38,4) ; 
s3 = data(1:12,5) ; f3 = data(1:12,6) ; 
s4 = data(1:14,7) ; f4 = data(1:14,8) ;
%s5 = data(1:18,9) ; f5 = data(1:18,10) ;
figure 
hold on
axis tight
theta_max = 2* pi ;
theta_min = 0 ;
theta_4 = linspace(theta_min, theta_max,132)' ;
N_terp = 1024;
theta_2 = linspace(theta_min,theta_max,N_terp)' ;
X_terp1 = spline (theta_4, s1, theta_2);
Y_terp1 = spline (theta_4, f1,theta_2);
theta_5 = linspace(theta_min, theta_max,38)' ;
X_terp2 = spline (theta_5, s2, theta_2);
Y_terp2 = spline (theta_5, f2,theta_2);
theta_6 = linspace(theta_min, theta_max,12)' ;
X_terp3 = spline (theta_6, s3, theta_2);
Y_terp3 = spline (theta_6, f3,theta_2);
theta_7 = linspace(theta_min, theta_max,14)' ;
X_terp4 = spline (theta_7, s4, theta_2);
Y_terp4 = spline (theta_7, f4,theta_2);
%theta_8 = linspace(theta_min, theta_max,18)' ;
%X_terp5 = spline (theta_8, s4, theta_2);
%Y_terp5 = spline (theta_8, f4,theta_2);
yyaxis right
ylabel('Force (N)');
xlim([0 6])
ylim([-100 200])
plot(s1,f1,'bx')
p1 = plot(X_terp1,Y_terp1,'-r','DisplayName','d=4.5mm')
p2 = plot(nan,nan,'r-', 'DisplayName', sprintf('max=%.2f N',max(f1)))
p3 = plot(nan,nan,'r-', 'DisplayName', sprintf('min=%.2f N',min(f1)))
plot(s2,f2,'r+')
p4 = plot(X_terp2,Y_terp2,'-m','DisplayName','d=6.0mm')
p5 = plot(nan,nan,'m-', 'DisplayName', sprintf('max=%.2f N',max(f2)))
p6 = plot(nan,nan,'m-', 'DisplayName', sprintf('min=%.2f N',min(f2)))
plot(s3,f3,'m*')
p7 = plot(X_terp3,Y_terp3,'-g','DisplayName','d=7.5mm')
p8 = plot(nan,nan,'g-', 'DisplayName', sprintf('max=%.2f N',max(f3)))
p9 = plot(nan,nan,'g-', 'DisplayName', sprintf('min=%.2f N',min(f3)))
yyaxis left
xlim([0 6])
ylim([-1000 2000])
plot(s4,f4,'go')
p10 = plot(X_terp4,Y_terp4,'-b','DisplayName','d=15.0mm')
p11 = plot(nan,nan,'b-', 'DisplayName', sprintf('max=%.2f N',max(f4)))
p12 = plot(nan,nan,'b-', 'DisplayName', sprintf('min=%.2f N',min(f4)))
%plot(s5,f5,'cs')
%p13 = plot(X_terp4,Y_terp4,'-c','DisplayName','')
%p14 = plot(nan,nan,'c-', 'DisplayName', sprintf('max=%.2f N',max(f5)))
%p15 = plot(nan,nan,'c-', 'DisplayName', sprintf('min=%.2f N',min(f5)))
grid on;
%xlim([0 0.0035])
%ylim([0 200])
ax = gca;
ax.XAxisLocation = 'origin';
title('Force vs Displacement (A)');
xlabel('Displacement (mm)');
ylabel('Force (N)');
lgd = legend([p1 p2 p3 p4 p5 p6 p7 p8 p9 p10 p11 p12],'Orientation','horizontal','Location','southoutside','NumColumns',3)
title(lgd,'Diameter,d')
set(gcf,'color','w');

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Answer 1

Udit Pant 2020-6-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/547151-how-to-combine-a-marker-to-a-line-and-show-in-legend#answer_1374912

移动：Voss 2023-12-20

在 MATLAB Online 中打开

Hi,

This can be achieved by drawing a plot with no data (nan) with the desired line and marker attributes. This way the plot won't be visible (due to nan) but the plot handle can be added to legend.

In your code, instead of adding p1 to the legend, you can create a new plot 'ph1' and add it to the legend.

ph1 = plot(nan, nan, 'r-x', 'MarkerEdgeColor', 'b', 'DisplayName','d=4.5mm');

Similarly, you can add plots with nan data and desired line & marker attributes for other plot handles as well. Hope this helps.