# How to draw a horizontal line in a diagram (3D plot)?

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Philipp Mueller on 21 Oct 2016
Edited: Adam on 21 Oct 2016
Hello,
I want to draw a horizontal line in my diagram! But it does not work. (Its a 3d plot with the view from above) Thank you for your support. Coordinates: x1=-350, y1=60, z1=10^6; x2=-100, y2=60, z2=10^6
[zeilen,spalten]=size(Input_Matrix)
x = Input_Matrix(:,1)
y = Input_Matrix(:,2)
z = Input_Matrix(:,3)
colorbar('location','Manual', 'position', [0.93 0.1 0.02 0.81]);
%WHY IT DOES NOT WORK?
%plot([-350,60,1000000],[-100,60,1000000])
%line([-350 60 1000000], [-100 60 1000000],'Color','r','LineWidth',19)
az = 0;
el = 90;
view(az, el);
view(0,90)
a = 30;
scatter3(x, y, z, a, z, 'filled');
hold on
view(0, 90)
[m,ind]=max(z);
scatter3(x(ind), y(ind), z(ind),'*r');
colorbar
datacursormode on
##### 1 CommentShowHide None
Adam on 21 Oct 2016
Edited: Adam on 21 Oct 2016
plot([-350,60,1000000],[-100,60,1000000])
works fine for me, when run on its own.

Mischa Kim on 21 Oct 2016
Philipp, use the line command.