How to plot 3D vectors on a 2D plot?

2022 5 24
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Hi everyone! I need to create a 2D plot where the elements that are at z = 1 must be at the same level of the elements at x and y but these elements along z must be highlighted against the background on x and y in order to be distinguished. How can I do it?

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Star Strider
Star Strider 2022-5-24
Ran in:
Ran in:
Where are the data?
Uz = unzip('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1009395/Prova_test.zip');
Uz2 = [num2cell((1:numel(Uz))') Uz']
Uz2 = 120×2 cell array
{[ 1]} {'Prova_test/codice_opcode.asv' } {[ 2]} {'Prova_test/codice_opcode.m' } {[ 3]} {'Prova_test/Scenari/' } {[ 4]} {'Prova_test/Scenari/Nuovascena.stl' } {[ 5]} {'Prova_test/Subfunctions/' } {[ 6]} {'Prova_test/Subfunctions/matlab/' } {[ 7]} {'Prova_test/Subfunctions/matlab/deer.ply' } {[ 8]} {'Prova_test/Subfunctions/matlab/opcodemesh.m' } {[ 9]} {'Prova_test/Subfunctions/matlab/opcodemeshdemo.m' } {[10]} {'Prova_test/Subfunctions/matlab/opcodemeshmex.mexw64'} {[11]} {'Prova_test/Subfunctions/matlab/read_ply2.m' } {[12]} {'Prova_test/Subfunctions/opcode/' } {[13]} {'Prova_test/Subfunctions/opcode/CMakeLists.txt' } {[14]} {'Prova_test/Subfunctions/opcode/Ice/' } {[15]} {'Prova_test/Subfunctions/opcode/Ice/IceAABB.cpp' } {[16]} {'Prova_test/Subfunctions/opcode/Ice/IceAABB.h' }
.

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Cris LaPierre
Cris LaPierre 2022-5-24

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The solution likely varies depending on your data, but I would probably first look into using imagesc:
imagesc(x,y,C)
This way, the difference in Z is captured in the color displayed in the figure.
imagesc(new_x,new_y,hit);

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Loren99
Loren99 2022-5-24
@Cris LaPierre I've just tried as you can see from the following figure but it is not okay because I want the shapes at z=1 to be reproduced on the x, y plane. Maybe is there a command that in scatter3 allows me to highlight the elements at z=1 with a different color with respect to x and y elements at z=0? Then I can apply view (0,90) to see the resulting map from the top
Cris LaPierre
Cris LaPierre 2022-5-24
编辑：Cris LaPierre 2022-5-24
It's hard to give anything specific without having your data. Consider saving your variables to a mat file and attaching that file to your post using the paperclip icon.
Loren99
Loren99 2022-5-24
编辑：Loren99 2022-5-24
@Cris LaPierre I cannot save the variables to a mat file because of their huge dimension. However I have attached a zip file with the main called 'codice_opcode'
Cris LaPierre
Cris LaPierre 2022-5-24
编辑：Cris LaPierre 2022-5-24
Ok, I see. I'll have to look more into imagesc, but the simplest approach for now might be to use gscatter, assuming hit is just 0 or 1
gscatter(new_x,new_y,hit);
Edit: Looked more
For an image, your data should be an array, not a vector. Use reshape to convert hit into a 12001x14001 array, and then use imagesc to view it. This is quicker than using scatter, both in creating and saving.
Ihit = reshape(hit,size(Z));
imagesc(Ihit);
axis xy
Loren99
Loren99 2022-5-24
@Cris LaPierre thank you very much for both the methods! Just a curiosity. In gscatter, is there a way to not plot the legend as well? because I need the clean image
Cris LaPierre
Cris LaPierre 2022-5-24
编辑：Cris LaPierre 2022-5-24
Yes. Use this syntax, where doleg is either 'on' or 'off'.
gscatter(x,y,g,clr,sym,siz,doleg)
You can't skip an input, so your code might look like this (empty brackets uses the default value)
gscatter(new_x,new_y,hit,[],[],[],'off');
You can explore these and other optional inputs in the linked documentation page.

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