surf plot from data sets connected to each other

I have a data (the file "data.mat" in attachment), that has a connected ribbons „structure”. I want to make a meshgrid and then a surface plot from the data, in a "circle way" seen on the picture below. When I tried to do this, I got an error informing that I am trying to use memory resources equivalent to billions of data.

Here is the code, I did for plotting using plot3() function.

data1=flip(data);

r=data1{:,'Yposition'};

t=data1{:,'Angle'};

z=data1{:,'MagZ'};

x=(2*pi*t)/360;

%first element of the vector

p=r(length(r),1)-2;

%last element of the vector

o=r(1,1);

%the number of radii

N=((o-p)/2)+1;

%amount of data for one circumference

k=floor(length(r)/N);

%plotting loop

figure

hold on

grid on

for i=1:(N-1);

j=(((i-1)*(k))+1):((i)*(k));

plot3((i)*cos(x(j)),(i)*sin(x(j)),z(j))

end

I ask You for help, because I have spent days on solving the problem and still don't know how to do this. :(

Answer 1

[Chunru]

load(websave("data.mat", "https://www.mathworks.com/matlabcentral/answers/uploaded_files/1115735/data.mat"))
head(data)

ans = 8×3 table
    Yposition    Zposition    Angle 
    _________    _________    ______

       128          80        232.51
       128          80        232.45
       128          80        232.67
       128          80        232.54
       128          80        232.38
       128          80        232.47
       128          80        232.49
       128          80        232.49

data1=flip(data);
r=data1.Yposition;
t=data1.Angle;
z=data1.Zposition;

x = r.*cosd(t);
y = r.*sind(t);
DT = delaunay(x, y);

Warning: Duplicate data points have been detected and removed.
Some point indices will not be referenced by the triangulation.

trisurf(DT,x,y,z,r, 'EdgeColor', 'none')

view(3)

[Karolina]

Thank You, but I see, that it has only one value in Z axis - 80. I would like to, that it would look similar to this one below (this one below is made of plot3(), I want surf):

[Chunru]

Then you need to replace the data.

[Karolina]

I have tried, but I'm sorry, I don't know how to get things done. Anyway, thank You very much.

[Chunru]

Please provide the data with different Z values.

[Karolina]

Oh, I see, what I did wrong! Thank You a lot!! It works now!