How to plot a line between two points in a scatter3 plot in MATLAB?

I am using the following code for producing a scatter3 plot:

X = [1,2,3,1,2,3,1,2,3,1,2,3,1,2,3];
Y = [0,0,0,20,20,20,40,40,40,60,60,60,80,80,80,];
Z1 = [10,-48.7863,-73.3457, -68.3091, -142.0666,...
      12, -35.7863, -23.347, -29.3091,-141.0660,...
Z2 = [2,8.2137,-2.3457, 46.6909, 12.9334,...
      10,11.2137, 19.6543,35.6909, 45.9334,...

figure;scatter3(X,Y,Z1,'filled'); hold on;

Which results in the following image:

enter image description here

What I would like to have is a vertical line between each blue and red dot.

An exemplary output could look like this: enter image description here

I tried using the line function, however I am not sure how to build up the vector.

I tried:

line(X,Y,Z1) % will only connect the blue dots
line(X,Y,Z2) % will only connect the red dots

line(X,Y,Z1:Z2) % will give an error that the vectors must be the same length

1 answer

  • answered 2017-12-06 18:12 gnovice

    You must vertically concatenate your Z1 and Z2 data so that each column defines a line to plot. You will also have to replicate X and Y in the same way:

    line([X; X], [Y; Y], [Z1; Z2], 'Color', 'r');

    And the result (added to your scatter plot):

    enter image description here