How can I Draw a Line on a 3D plot?

Question

Joshua Mitchell 2021-6-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/862525-how-can-i-draw-a-line-on-a-3d-plot

评论： Bretislav Kubes 2023-1-5

采纳的回答： Scott MacKenzie

在 MATLAB Online 中打开

I am trying to draw a red line across a 3D surface plot for an app:

I have the 2D plot coded to do this as follows:

            surf(app.UIAxes2,Bat);
            ylim(app.UIAxes2, [0 60]);
            xlim(app.UIAxes2, [0 60]);
            view(app.UIAxes2,2);
            app.UIAxes2.PositionConstraint = 'outerposition';
            xline(app.UIAxes2,value,'Color','red','LineStyle','-','LineWidth',1.5);

but the xline command will not work for the 3D plot, as it does not follow the Z data and draws a line straight through the dipole I am modelling.

"value" in the above code is whatever line is selected by the app user.

"Bat" is the matrix data I am modelling.

Does anyone know how to plot a red line like this that will contour to my Z data? Here is the code for my 3D plot below:

            surf(app.UIAxes3,Bat);
            ylim(app.UIAxes3, [0 60]);
            xlim(app.UIAxes3, [0 60]);
            view(app.UIAxes3,3);
            app.UIAxes3.PositionConstraint = 'outerposition';
            ztickformat(app.UIAxes3,'%g'); 
            ax = app.UIAxes3;
            ax.ZAxis.Exponent = 0;

Any help is appreciated, thank you.

2 个评论
显示无隐藏无

Scott MacKenzie 2021-6-22

Have your tried line, instead of xline? It allows for x, y, and z input arguments.

Joshua Mitchell 2021-6-23

在 MATLAB Online 中打开

I am trying to use line and it seems like it is possible, but I'm having a hard time figuring out how it should work with my data specifically.

I've tried:

            surf(app.UIAxes3,Bat);
            ylim(app.UIAxes3, [0 60]);
            xlim(app.UIAxes3, [0 60]);
            view(app.UIAxes3,3);
            app.UIAxes3.PositionConstraint = 'outerposition';
            ztickformat(app.UIAxes3,'%g'); 
            ax = app.UIAxes3;
            ax.ZAxis.Exponent = 0;
            line(app.UIAxes3,Bat(value,:),Bat(:,value),Bat(:,10),'Color','red','LineStyle','--','LineWidth',1.5);

And it is giving me strange lines like:

It is probably just how I am setting the x,y,z value but I can't seem to come up with a decent line.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Scott MacKenzie 2021-6-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/862525-how-can-i-draw-a-line-on-a-3d-plot#answer_732295

编辑：Scott MacKenzie 2021-6-24

在 MATLAB Online 中打开

Here's an example using line. I used your code, but re-assigned ax.UIAxes2, Bat, and value so the code would execute on my machine.

UIAxes3 = gca;    % your app.UIAxes3
Bat = peaks; % for testing
value = 30;  % test value
surf(UIAxes3, Bat);
ylim(UIAxes3, [0 60]);
xlim(UIAxes3, [0 60]);
view(UIAxes3, 3);
UIAxes3.PositionConstraint = 'outerposition';
ztickformat(UIAxes3,'%g');
UIAxes3.ZAxis.Exponent = 0;
x = 1:size(Bat,2);
y = ones(1,size(Bat,2)) * value;
z = Bat(value,:);
line(UIAxes3,x,y,z,'Color','red','LineStyle','--','LineWidth',2.5);