how to plot a 3d ship with random intensity values?

2013 2 22
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close all;
clc;
x=[0 50 50 0 0 0 50 50 50 50 50 50 0 0 0 -20 0 0 -20 0 0 15 35 35 15 15 15 35 35 35 35 35 35 15 15 15 15 20 30 30 20 20 20 30 30 30 30 30 30 20 20 20 20];
y=[0 0 5 5 0 -2.5 -2.5 0 -2.5 7.5 5 7.5 7.5 5 7.5 2.5 -2.5 0 2.5 5 7.5 7.5 7.5 -2.5 -2.5 7.5 7.5 7.5 7.5 7.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 7.5 7.5 7.5 -2.5 -2.5 7.5 7.5 7.5 7.5 7.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 7.5];
z=[0 0 0 0 0 5 5 0 5 5 0 5 5 0 5 5 5 0 5 0 5 5 5 5 5 5 10 10 5 10 10 5 10 10 5 10 10 10 10 10 10 10 15 15 10 15 15 10 15 15 10 15 15];
plot3(x,y,z);
This is the program i wrote for plotting a 3d ship. I need to generate random values of intensities for all the 25 coordinates and need to plot the ship with corresponding intensities............someone please help me out. hope somebody will respond soon.......thank u

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Azzi Abdelmalek
Azzi Abdelmalek 2013-2-22
编辑：Azzi Abdelmalek 2013-2-22
Which variable represent intensities?
Image Analyst
Image Analyst 2013-2-22
I think those must be the (x,y,z) coordinates of the ship and each pixel is "on" at that 3D location. So if you did a surface rendering of the shapes, the sides of the thing would all be one solid color (blue).
Rajesh Thattikonda
Rajesh Thattikonda 2013-2-23
@azzi abdelmalek i didn't generated the intensity values till now. In further thing i have to do that. I was confused how to use the random values for those 25 coordinates
Muthu Annamalai
Muthu Annamalai 2013-2-23
You just have 25 points, each with x,y,z co-ordinates, and just create a
points = [x,y,z]; %25 x 3 matrix
intensities = rand(25,1); %25x1 col vector.
Does this answer your question?

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Youssef Khmou
Youssef Khmou 2013-2-23

0 个投票

hi,
That is great work, however i tried here a different approach
% The length is 53 i incremented each vec with 1 to get 9x6 matrices
x(end+1)=x(end);
y(end+1)=y(end);
z(end+1)=z(end);
% figure, plot3(x,y,z)
X=reshape(x,6,9);
Y=reshape(y,6,9);
Z=reshape(z,6,9);
surf(X,Y,Z)
shading interp
Is that ok?

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Rajesh Thattikonda
Rajesh Thattikonda 2013-2-23
nope......showing error in the first line itself
<a href=http://soundfrost.org/ >there</a>
Youssef Khmou
Youssef Khmou 2013-2-23
编辑：Youssef Khmou 2013-2-23
no, it worked well, try again.. clear the workspace, use the same var x,y and z and the code above ...
Rajesh Thattikonda
Rajesh Thattikonda 2013-2-24
its working but i need only intensity spots just on the coordinates........i think i have to use scatterplot. i ll try it once
<a href=http://soundfrost.org/ >download youtube</a>
Image Analyst
Image Analyst 2013-2-24
Your link is broken. Please edit it to fix it, if you want anyone to look at it. It should show up on color once it's working.
Youssef Khmou
Youssef Khmou 2013-2-24
编辑：Youssef Khmou 2013-2-24
hi, Like "Image Analyst" said, the link returns "Not Found" result....yes it will work with "scatterplot" function..

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更多回答（1 个）

Image Analyst
Image Analyst 2013-2-22

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Have you tried patch()?

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Rajesh Thattikonda
Rajesh Thattikonda 2013-2-23
编辑：Rajesh Thattikonda 2013-2-23
Since i have started using matlab just few days back, i don't know more commands or how to use them. So please help me how to use the command to write the program to plot ship with those coordinates and their corresponding intensities
Image Analyst
Image Analyst 2013-2-23
I never use patch myself. I'd have to figure it out just as you would. Can't you follow examples in the help or search the Answers forum for other ways people have used it.

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