Plotting multiple 3D plots on one graph

Hi,

I have the following code. I want to plot all 7 on the same plot. How do I do that?

I tried hold on, but that gives me an empty plot. Thank you!

figure (4)
plot3(cm_willans,pma_1400,pme_e, '-r');
plot3(cm_willans,pma_1900,pme_e, '-m');
plot3(cm_willans,pma_2500,pme_e, '-g');
plot3(cm_willans,pma_3000,pme_e, '-b');
plot3(cm_willans,pma_4200,pme_e, '-k');
plot3(cm_willans,pma_5300,pme_e, '-y');
plot3(cm_willans,pma_6400,pme_e, '-c');
grid on
hold on
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')

Also, secondary question: How do I create a legend for each one of those lines? Thanks

Answer 1

[Shubham Gupta]

Try :

figure (4)
grid on
hold on % Hold position should be at the start of plotting to overlap plots
plot3(cm_willans,pma_1400,pme_e, '-r','DisplayName','legend-1');
plot3(cm_willans,pma_1900,pme_e, '-m','DisplayName','legend-2');
plot3(cm_willans,pma_2500,pme_e, '-g','DisplayName','legend-3');
plot3(cm_willans,pma_3000,pme_e, '-b','DisplayName','legend-4');
plot3(cm_willans,pma_4200,pme_e, '-k','DisplayName','legend-5');
plot3(cm_willans,pma_5300,pme_e, '-y','DisplayName','legend-6');
plot3(cm_willans,pma_6400,pme_e, '-c','DisplayName','legend-7'); % DisplayName property to set legend name
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show

Hope it helps !

[JD]

Hi Shubham, thank you for the response. The above code you suggested converts it to a 2D plot instead of plotting all 7 lines on a 3D plot. Do you know how to fix that?

[Shubham Gupta]

Add the following line at the end of the code

view(3)

Let me know if you have further doubts

Edit : Or you put "hold on" after you plot 1st 3d plot. E.g.

plot3(cm_willans,pma_1400,pme_e, '-r','DisplayName','legend-1');
hold on % position one below the first 3-d plot
plot3(cm_willans,pma_1900,pme_e, '-m','DisplayName','legend-2');
plot3(cm_willans,pma_2500,pme_e, '-g','DisplayName','legend-3');
plot3(cm_willans,pma_3000,pme_e, '-b','DisplayName','legend-4');
plot3(cm_willans,pma_4200,pme_e, '-k','DisplayName','legend-5');
plot3(cm_willans,pma_5300,pme_e, '-y','DisplayName','legend-6');
plot3(cm_willans,pma_6400,pme_e, '-c','DisplayName','legend-7'); 

[JD]

Hi Shubham,

Thank you very much! That worked above! Another quick question: All my lines overlay on top of each other, graph attached. How do I make them show side by side and not on top of each other?

Thanks

[Shubham Gupta]

Use subplot to create subplots on the plot. Try :

figure;
subplot(171)
plot3(cm_willans,pma_1400,pme_e, '-r','DisplayName','legend-1');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show
subplot(172)
plot3(cm_willans,pma_1900,pme_e, '-m','DisplayName','legend-2');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show
subplot(173)
plot3(cm_willans,pma_2500,pme_e, '-g','DisplayName','legend-3');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show
subplot(174)
plot3(cm_willans,pma_3000,pme_e, '-b','DisplayName','legend-4');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show
subplot(175)
plot3(cm_willans,pma_4200,pme_e, '-k','DisplayName','legend-5');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show
subplot(176)
plot3(cm_willans,pma_5300,pme_e, '-y','DisplayName','legend-6');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show
subplot(177)
plot3(cm_willans,pma_6400,pme_e, '-c','DisplayName','legend-7');
xlabel('Cm in m/s')
ylabel('Pma in Pascals')
zlabel('Pme in Pascals')
legend show

I am not sure if that's what you want. Let me know if you have doubts

[JD]

Thank you Shubham

Answer 2

[OMKAR SHETYE]

For the legend part :- first create a vector which will have all the names for the respective plots, then call the legend function using the pre-defined vector.

figure (4)

grid on

hold on % Hold position should be at the start of plotting to overlap plots

plot3(cm_willans,pma_1400,pme_e, '-r','DisplayName','legend-1');

plot3(cm_willans,pma_1900,pme_e, '-m','DisplayName','legend-2');

plot3(cm_willans,pma_2500,pme_e, '-g','DisplayName','legend-3');

plot3(cm_willans,pma_3000,pme_e, '-b','DisplayName','legend-4');

plot3(cm_willans,pma_4200,pme_e, '-k','DisplayName','legend-5');

plot3(cm_willans,pma_5300,pme_e, '-y','DisplayName','legend-6');

plot3(cm_willans,pma_6400,pme_e, '-c','DisplayName','legend-7'); % DisplayName property to set legend name

xlabel('Cm in m/s')

ylabel('Pma in Pascals')

zlabel('Pme in Pascals')

v = ["Plot-1","Plot-2","Plot-3","Plot-4","Plot-5","Plot-6","Plot-7"]

legend(v)