how to merge 2D and 3D plots with desired positioning

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Davit Hakobyan
Davit Hakobyan 2013-7-1
Hi everybody. I have one 3d cylinder and one 2d circle. I want to plot them together the circle being the fundamental layer of cylinder at z=0. Thank's in advance. Here so far what I have, I can plot them separately. clear all; clc; close all;
P = imread('image.jpg');%
A = P(:,:,2); %select one channel
D = double(A(:,:)); %make it double
r=207;% the circle radius
k = size(D,2); %the z direction
t = 1:k;
theta=linspace(0,2*pi,size(D,1));
[time,angle]= meshgrid(t,theta);
x = r*cos(angle);
y = r*sin(angle);
c = D(:,:);
figure(1)
surface(x,y,time,c)% making cylinder
set(gcf,'Position',[0 0 400 700 ]);
view([-164,-26])
shading interp
sz=size(A); x2=633; y2=529; % center of region
[x1grid, y1grid] = meshgrid(1:sz(2), 1:sz(1));
x1 = x1grid - x2; % offset the origin y1 = y1grid - y2;
circlemask = x1.^2 + y1.^2 > r.^2;
% Use the mask to select part of the image
circle_image = double(A) .* circlemask-double(A);
hold all
figure(2) imagesc(circle_image);% circular part
shading interp

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回答（1 个）

Hugo
Hugo 2013-7-2
You can use surf as you did with the cylinder. You then might need to define the grid small enough and set the colours outside the circle as NaN instead of zero.
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Davit Hakobyan
Davit Hakobyan 2013-7-2
Can you please provide me some code. I guess for you it will take instant.I am beginner, and I get lost in process with in errors.

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