Plotting 3D for three independent variables without any function

23 visualizaciones (últimos 30 días)
I have four vectors as attached in Data_1.tx. file. I'm looking for a way to plot their surface map. Where X = (:,column3), Y = (:,column 2) and Z = (:,Column 1). I have looked into meshgrid but did not work since I do not have a function to estimate Z from given X and Y Values. They are only data. I have found and tried this below code but did not like the graph.
trisurf(delaunay(X,Y),X,Y,Z)
I have tried Scatter 3 as below and I do not like it. Is there anyway to present them as the below colourful box? Thank you for your help. scatter.png
  5 comentarios
Walter Roberson
Walter Roberson el 14 de Oct. de 2020
t = readtable('Surface plot.xlsx');
x = t.Temp; y= t.Pressure; z = t.Time;
tri = delaunay(x,y);
trimesh(tri, x, y, z);
Amanullah Khan
Amanullah Khan el 19 de Oct. de 2020
Thank you so much Mr Walter. It worked for me.

Iniciar sesión para comentar.

Respuesta aceptada

Walter Roberson
Walter Roberson el 21 de Mzo. de 2019
Editada: Walter Roberson el 21 de Mzo. de 2019
For a typical surface map, you would use
interpolated_z = griddata(X, Y, Z, query_x, query_y);
surf(query_x, query_y, interpolated_z, 'edgecolor', 'none')
However, the example diagram you give is an example of using https://www.mathworks.com/help/matlab/ref/slice.html on a 3D grid of data. You do not have the information necessary for that -- not unless the unused 4th column of your input is value information.
When I look at your data, it looks to me to be more likely that your first column is value information and that your remaining three columns are X, Y, Z coordinates, rather than your first column being Z coordinates.
  6 comentarios
Yaser Khojah
Yaser Khojah el 21 de Mzo. de 2019
Thank you so much, this is really useful. Is V presented by the colorbar? slic.png
Walter Roberson
Walter Roberson el 21 de Mzo. de 2019
Yes, V is represented as color.
You can also create a diagonal set of query points, and hold on and slice() with it. When I looked at the data I could not see any particular angle that it would make sense to slice at.

Iniciar sesión para comentar.

Más respuestas (1)

M Naeem
M Naeem el 23 de Jul. de 2021
can you please help in plotting graph of f(x,y,z)=2x+5xy+11xyz+2z
  2 comentarios
Walter Roberson
Walter Roberson el 24 de Jul. de 2021
N = 50;
xvec = linspace(-5,5,N);
yvec = linspace(-5,5,N);
zvec = linspace(-5,5,N);
[X,Y,Z] = meshgrid(xvec, yvec, zvec);
fxyz = 2 .* X + 5 .* X .* Y + 11 .* X .* Y .* Z + 2 .* Z;
minf = min(fxyz(:));
maxf = max(fxyz(:));
levels = linspace(minf, maxf, 9);
levels = levels(2:end-1);
nlev = length(levels);
for K = 1:nlev
L = levels(K);
isosurface(X, Y, Z, fxyz, L, fxyz);;
end
camlight; lighting phong
legend( string(levels) );
colorbar
hold off

Iniciar sesión para comentar.

Categorías

Más información sobre Data Distribution Plots en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by