MATLAB: Plot 3d matric

3d matrix plots

I have a 3d-matrix for the temperature transfer of a plate T(i,j,t) i is the coordinate in the x-direction. j is the coordinate in the y-direction. t is the coordinate for the time ( in z direction). How can I plot it in a 3d- diagram (similar to the following diagram)

Thanks in advance. P/s: the plate is in 2d

Best Answer

clc; clear all ;
x = linspace(0,1) ; % your x domain 
y = linspace(0,1) ; % your y domain 
[X,Y] = meshgrid(x,y) ;  % your domain mesh 
nt = 20 ; % time steps
% loop for plotting on time 
for i = 1:nt
    T = rand(1)*peaks(100) ;  % some temeprature 
    surf(X,Y,T) ;
    drawnow
end

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MATLAB: How to create a ring using meshgrid with user defined radius

clc; clear all ;
M = 10 ;
N = 100 ;
R1 = 0.5 ; % inner radius 
R2 = 1 ;  % outer radius
nR = linspace(R1,R2,M) ;
nT = linspace(0,2*pi,N) ;
%nT = pi/180*(0:NT:theta) ;
[R, T] = meshgrid(nR,nT) ;
% Convert grid to cartesian coordintes
X = R.*cos(T); 
Y = R.*sin(T);
[m,n]=size(X);
% Plot grid
figure
set(gcf,'color','w') ;
axis equal
axis off
box on
hold on
% Plot internal grid lines
for i=1:m
    plot(X(i,:),Y(i,:),'k','linewidth',1.5); 
end
for j=1:n
    plot(X(:,j),Y(:,j),'k','linewidth',1.5); 
end

You may check the link:

http://in.mathworks.com/matlabcentral/fileexchange/33731-meshing-a-plate-using-four-noded-elements

MATLAB: How to draw circle with sectors

I suggest the following code:

clc; clear all ;
th = linspace(0,2*pi) ;   % angles 
r = [1 2 3 4 5] ;         % redius of required circles 
C = [0 0] ;               % cenre of the circle 
% 
for i = 1:length(r)
    % parametric equation of circles
    x = C(1)+r(i)*cos(th) ;
    y = C(2)+r(i)*sin(th) ;
    plot(x,y,'r') ;
    hold on    
end
axis equal
plot(C(1),C(2),'Xb') ;  % centre circle cross 
% Draw lines
th1 = [pi/4 3*pi/4 5*pi/4 7*pi/4] ;    % angles at which lines required 
t = linspace(0,1) ;                     
% draw lines
for i = 1:length(th1)
    x0 = r(1)*cos(th1(i)) ; y0 = r(1)*sin(th1(i)) ;
    x1 = r(end)*cos(th1(i)) ; y1 = r(end)*sin(th1(i)) ;
    x = x0+t*(x1-x0) ;y = y0+t*(y1-y0) ; % parametric equation of line 
    plot(x,y,'b')
end
axis off

Best Answer

Related Solutions

MATLAB: How to create a ring using meshgrid with user defined radius

MATLAB: How to draw circle with sectors

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