Coordinates of each rectangular cell is required

I have created a mesh using mesh command having 16 cells.

I want the coordinates of every cell in a separate array.I had tried the following code but it didnot work.Please help.

x=zeros(1,5)+5;

y=linspace(4,16,5);

xx=x';

yy=y';

[XX,YY]=meshgrid(xx,y);

Y=YY';

z=linspace(-1,3,5)';

zz=repmat(z,1,5);

A=mesh(XX,Y,zz);

axis([-10 40 -10 40])

for a=1:4

for b=1:4

C1X1(a,b)=[XX(a,b) XX(a,b+1) XX(a+1,b) XX(a+1,b+1)];

end

end

C1X1 should be 16 by 4 matrix as the loop runs 16 times but I am unable to define C1X1

Answer 1

[Dyuman Joshi]

You are defining C1X1 incorrectly (trying to fit 4 elements as 1) -

x=zeros(1,5)+5;
y=linspace(4,16,5);
xx=x';
yy=y';
[XX,YY]=meshgrid(xx,y);
Y=YY';
z=linspace(-1,3,5)';
zz=repmat(z,1,5);
A=mesh(XX,Y,zz);
axis([-10 40 -10 40])

C1X1=[];
for a=1:4
    for b=1:4
       C1X1=[C1X1; XX(a,b) XX(a,b+1) XX(a+1,b) XX(a+1,b+1)];
    end
end
C1X1

C1X1 = 16×4

5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

[MD EQBAL]

Thanks a lot.

Can you please guide me about the purpose of C1X1=[]; ?

[Dyuman Joshi]

It defines C1X1 as an empty matrix. We can modify it however we want to.

[MD EQBAL]

Thanks a lot.

Can you guide me in one more problem?

If A is rotated by 10 degrees, how can I find the new coordinates of the new rectangular cell?

x=zeros(1,5)+5;

y=linspace(4,16,5);

xx=x';

yy=y';

[XX,YY]=meshgrid(xx,y);

Y=YY';

z=linspace(-1,3,5)';

zz=repmat(z,1,5);

A=mesh(XX,Y,zz);

direction = [0 0 1];

centre=[25 10 1];

rotate(A,direction,10,centre)

[Dyuman Joshi]

What do you mean by rotated by 10 degrees?

[MD EQBAL]

By rotation of 10 deg, I mean that the mesh A is rotated by 10 degrees about an axis passing through its centre and parallel to z axis.

After rotation, the coordinates of the rectangular cell will change. I was trying to assign another variable B to the rotated mesh like this:-

B=rotate(A,direction,10,centre)

But the following error occurs :-

" Error using rotate

Too many output arguments."

I need the coordinates of the rectangular cell of the rotated mesh.

Please help.