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Thread Subject:
How to show perpendicular projections from a point on the opposite

Subject: How to show perpendicular projections from a point on the opposite

From: Samiran Dam

Date: 5 Jul, 2011 05:23:08

Message: 1 of 4

Hi,

How to show perpendicular projections from a point on the opposite
plane of a MATLAB 3D scatter plot?

I am getting the plot without the projections by the following code:

xyz=[30 40 50;
30 20 80];

x=xyz(:,1);
y=xyz(:,2);
z=xyz(:,3);

axes('FontSize',20);
plot3(x,y,z, 'o')
grid on;
xlabel('x');
ylabel('y');
zlabel('z');
title('Displacement','FontSize',20);

Please help me.

regards
Samiran

Subject: How to show perpendicular projections from a point on the opposite

From: Roger Stafford

Date: 5 Jul, 2011 06:07:09

Message: 2 of 4

Samiran Dam <samiran.dam@gmail.com> wrote in message <9aa13bed-54ad-41f1-980e-f9cf273f7a9a@q29g2000prj.googlegroups.com>...
> How to show perpendicular projections from a point on the opposite
> plane of a MATLAB 3D scatter plot?
- - - - - - - - -
  I am at a loss to understand what plane you are referring to by "the opposite plane". What is this opposite plane? Also what point do you have in mind projecting orthogonally onto it? Or do you ask that all points in the given scatter plot be so projected?

Roger Stafford

Subject: How to show perpendicular projections from a point on the opposite

From: Samiran Dam

Date: 5 Jul, 2011 06:15:34

Message: 3 of 4

On Jul 5, 11:07 am, "Roger Stafford"
<ellieandrogerxy...@mindspring.com.invalid> wrote:
> Samiran Dam <samiran....@gmail.com> wrote in message <9aa13bed-54ad-41f1-980e-f9cf273f7...@q29g2000prj.googlegroups.com>...
> > How to show perpendicular projections from a point on the opposite
> > plane of a MATLAB 3D scatter plot?
>
> - - - - - - - - -
>   I am at a loss to understand what plane you are referring to by "the opposite plane".  What is this opposite plane?  Also what point do you have in mind projecting orthogonally onto it?  Or do you ask that all points in the given scatter plot be so projected?
>
> Roger Stafford

Sorry if I was not so clear in my last post. By opposite plane, I
meant, x-y, y-z, and z-x planes. Suppose, I have a point in a 3D plot.
Now I want to show how much (perpendicular) distance the point is from
all the three planes (namely, xy, yz and zx) to get a clear
perspective. If still I am not clear, please let me know.

regards
Samiran

Subject: How to show perpendicular projections from a point on the opposite

From: Roger Stafford

Date: 5 Jul, 2011 06:28:07

Message: 4 of 4

Samiran Dam <samiran.dam@gmail.com> wrote in message <c5d77992-9102-4b7b-b3f2-741ae614abe2@34g2000pru.googlegroups.com>...
> Sorry if I was not so clear in my last post. By opposite plane, I
> meant, x-y, y-z, and z-x planes. Suppose, I have a point in a 3D plot.
> Now I want to show how much (perpendicular) distance the point is from
> all the three planes (namely, xy, yz and zx) to get a clear
> perspective. If still I am not clear, please let me know.
>
> regards
> Samiran
- - - - - - - - - -
  That question is a little too easy. I think you can answer it yourself if you think about it carefully. Think about the meaning of the coordinates of the scatter points.

Roger Stafford

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