How to bring a plot to the front or back among multiple plots
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Liqing
on 24 Feb 2012
Commented: Yogishree Arabinda
on 25 Apr 2024
I have some interpolated ocean data that goes to land. I am thinking to first plot the interpolated values using 'scatter', and then plot the map using 'fill'. But the problem is that, it does not matter which one I plot first, the scatter plot is always on top. My question is how do I bring the scatter plot to back (behind the fill plot)?
Thank you,
0 Comments
Accepted Answer
Walter Roberson
on 24 Feb 2012
Are you using transparency? Or does
get(gca, 'Renderer')
return OpenGL ?
If so then note that OpenGL does not pay attention to the child order: it works in (projected) Z order. It also has rules about what happens if there is a line and a surface in the same plane: the order is determined by the graphic type. I never bothered to remember which order OpenGL defines in this case, as I have encountered graphics driver that get the order exactly backwards.
In the case of OpenGL, you need to make sure that the item that you want to be on "top" has a higher (projected) Z coordinate, closer to the front from the perspective of the viewer. That can involve using scatter3() instead of scatter() and specifying a constant Z coordinate above or below the implied Z=0 of other objects.
4 Comments
Walter Roberson
on 31 May 2013
image() objects are 2D objects, not 3D objects whose Z happens to be 0. The difference between 2D and 3D with a constant Z can be seen when you tilt the perspective: when not seen from the top, the 2D object will vanish except for its edge, whereas the 3D object with constant Z will do the expected projection to become an angled surface.
pcolor is equivalent to surf() followed by view([0 90])
If you want to be able to tilt an image then you need to texture map it onto either a surface() object or a patch() object. Those steps are also required if you want to give an image a specific z coordinate so as to get layering as appropriate for your situation.
Walter Roberson
on 15 Jul 2021
Edited: Walter Roberson
on 15 Jul 2021
Note: as of R2014b, the available options changed. See https://blogs.mathworks.com/graphics/2014/11/04/sortmethod/
More Answers (4)
the cyclist
on 24 Feb 2012
The "Children" property of the axis is a list of the handles of the objects on the plot. In general, the order of that list determines the layering.
Here is a simple example where I manipulate the order of that list:
[EDITED in response to comment.]
figure
scatter(rand(150,1),rand(150,1))
hold on
fill([0.2 0.5 0.5 0.2],[0.2 0.2 0.5 0.5],'r')
hg = line([0 0.6],[0.6 0]);
set(hg,'LineWidth',12,'Color','g')
h = get(gca,'Children');
set(gca,'Children',[h(3) h(2) h(1)])
5 Comments
Aniruddh Murali
on 7 Dec 2017
I have an image and two points. Each point should have its trail shown and the image should be changed each time. How do I do that?
2 Comments
the cyclist
on 7 Dec 2017
I suggest you open a new question for this, rather than appending an "answer" onto a four-year-old question that is barely related to what you want to do.
When you open your new question, please add significantly more detail about what you want. What you have written does not give sufficient information for us to help you.
Austin Coleman
on 1 Apr 2021
lol this guy was irritated. If you took the time to respond to a "4 year old question" just answer the question hahaha
Thelanorth
on 26 Feb 2019
What worked for me, I wanted to draw some lines etc. over a data, was to just use plot3([x1 x2],[y1 y2],[z1 z2]) ipv plot([x1 x2],[y1 y2]).
This means that just adding a z coordinate higher than you data might work.
0 Comments
D
on 12 Feb 2023
Edited: D
on 12 Feb 2023
A quick way to move the top child all the way to the bottom would be to use circshift:
hax = gca;
hax.Children = circshift(hax.Children, -1);
2 Comments
Walter Roberson
on 12 Feb 2023
When you are dealing with 3D graphics, the child order can influence what is drawn, but there are other important factors as well; https://blogs.mathworks.com/graphics/2014/11/04/sortmethod/
Yogishree Arabinda
on 25 Apr 2024
Thanks a lot it worked for me. Just needed to change from '-1' to '-2' as I had to bring the line below two other curves.
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