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From: Danna on 25 Jul 2010 14:40
want to make an animation where the figure rotates

M=[-3,2,-1;4,-2,3;5,-4,-2;-3,2,-1];

rho = pi/8;
figure, plot(M(1,:), M(2,:),'b.-', M(1,:), M(2,:),'*m'),
axis( [-10,10,-10,10]); hold on

RotMatrix=[cos(rho),-sin(rho),0;sin(rho),cos(rho),0;0,0,1];
for i = 1:64
M=M*RotMatrix;
pause(.08)
plot(M(1,:),M(2,:),'-.b',M(1,:),M(2,:),'*m'),

end
From: us on 25 Jul 2010 15:10
"Danna " <silver_girl(a)hotmail.com> wrote in message <i2i0e4$l1m$1(a)fred.mathworks.com>...
> want to make an animation where the figure rotates
>
> M=[-3,2,-1;4,-2,3;5,-4,-2;-3,2,-1];
>
> rho = pi/8;
> figure, plot(M(1,:), M(2,:),'b.-', M(1,:), M(2,:),'*m'),
> axis( [-10,10,-10,10]); hold on
>
> RotMatrix=[cos(rho),-sin(rho),0;sin(rho),cos(rho),0;0,0,1];
> for i = 1:64
> M=M*RotMatrix;
> pause(.08)
> plot(M(1,:),M(2,:),'-.b',M(1,:),M(2,:),'*m'),
>
> end

a hint:
- peruse ML's stock function

help comet;
% to learn about animations

us
From: Jan Simon on 25 Jul 2010 18:51
Dear Danna,

> want to make an animation where the figure rotates

It would be very helpful if you describe, why you think, your animation code is wrong. Errors? Unexpected results?

Jan
From: Danna on 25 Jul 2010 19:12
"Jan Simon" <matlab.THIS_YEAR(a)nMINUSsimon.de> wrote in message <i2if4n$1g2$1(a)fred.mathworks.com>...
> Dear Danna,
>
> > want to make an animation where the figure rotates
>
> It would be very helpful if you describe, why you think, your animation code is wrong. Errors? Unexpected results?
>
> Jan

The figure its suposed to rotate, but it doesnt. I tried to adapt from this code:

M = [1 2 2 1 1; 1 1 2 2 1; 1 1 1 1 1 ];
X = [1 2 2 1 1; 1 1 2 2 1; 1 1 1 1 1 ];
rho = pi/8;
figure, plot(M(1,:), M(2,:),'b.-', M(1,:), M(2,:),'*m'),
axis( [-10,10,-10,10]); hold on
plot(X(1,:), X(2,:),'--g',X(1,:), X(2,:),'xr')
TransOrigin=[1 0 1; 0 1 1; 0 0 1];
TransBack=[1 0 -1; 0 1 -1; 0 0 1];
RotMatrix=[cos(rho) -sin(rho) 0;sin(rho) cos(rho) 0; 0 0 1];
DilMatrix=[1.01 0 0;0 1.01 0; 0 0 1];
CompositionMatrix=TransBack*DilMatrix*RotMatrix*TransOrigin;
for i = 1:64
M= CompositionMatrix*M;
pause(.08)
plot(M(1,:),M(2,:),'-.b',M(1,:),M(2,:),'*m'),
X = CompositionMatrix*X;
pause(.08)
plot(X(1,:),X(2,:),'--g',X(1,:),X(2,:),'xr'), hold on
end
From: us on 25 Jul 2010 19:39
"Danna " <silver_girl(a)hotmail.com> wrote in message <i2igc3$hru$1(a)fred.mathworks.com>...
> "Jan Simon" <matlab.THIS_YEAR(a)nMINUSsimon.de> wrote in message <i2if4n$1g2$1(a)fred.mathworks.com>...
> > Dear Danna,
> >
> > > want to make an animation where the figure rotates
> >
> > It would be very helpful if you describe, why you think, your animation code is wrong. Errors? Unexpected results?
> >
> > Jan
>
> The figure its suposed to rotate, but it doesnt. I tried to adapt from this code:
>
> M = [1 2 2 1 1; 1 1 2 2 1; 1 1 1 1 1 ];
> X = [1 2 2 1 1; 1 1 2 2 1; 1 1 1 1 1 ];
> rho = pi/8;
> figure, plot(M(1,:), M(2,:),'b.-', M(1,:), M(2,:),'*m'),
> axis( [-10,10,-10,10]); hold on
> plot(X(1,:), X(2,:),'--g',X(1,:), X(2,:),'xr')
> TransOrigin=[1 0 1; 0 1 1; 0 0 1];
> TransBack=[1 0 -1; 0 1 -1; 0 0 1];
> RotMatrix=[cos(rho) -sin(rho) 0;sin(rho) cos(rho) 0; 0 0 1];
> DilMatrix=[1.01 0 0;0 1.01 0; 0 0 1];
> CompositionMatrix=TransBack*DilMatrix*RotMatrix*TransOrigin;
> for i = 1:64
> M= CompositionMatrix*M;
> pause(.08)
> plot(M(1,:),M(2,:),'-.b',M(1,:),M(2,:),'*m'),
> X = CompositionMatrix*X;
> pause(.08)
> plot(X(1,:),X(2,:),'--g',X(1,:),X(2,:),'xr'), hold on
> end

one of the solutions

M=[1 2 2 1 1; 1 1 2 2 1; 1 1 1 1 1 ];
X=[1 2 2 1 1; 1 1 2 2 1; 1 1 1 1 1 ];
rho=pi/8;
figure;
axis([-10,10,-10,10]);
hold on;
ph1=plot(M(1,:),M(2,:),'b.-',M(1,:),M(2,:),'*m');
ph2=plot(X(1,:),X(2,:),'--g',X(1,:),X(2,:),'xr');
TransOrigin=[1 0 1; 0 1 1; 0 0 1];
TransBack=[1 0 -1; 0 1 -1; 0 0 1];
RotMatrix=[cos(rho),-sin(rho),0;sin(rho),cos(rho),0;0,0,1];
DilMatrix=[1.01,0,0;0,1.01,0;0,0,1];
CompositionMatrix=TransBack*DilMatrix*RotMatrix*TransOrigin;
for i=1:64
M=CompositionMatrix*M;
X=CompositionMatrix*X;
pause(.08);
set(ph1,...
{'xdata'},num2cell(M(1,:),2),...
{'ydata'},num2cell(M(2,:),2));
pause(.08);
set(ph2,...
{'xdata'},num2cell(X(1,:),2),...
{'ydata'},num2cell(X(2,:),2));
end

us
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