plot magnitude data at location (x,y,z)
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Jorge
el 22 de Ag. de 2024 a las 13:27
Comentada: Star Strider
el 23 de Ag. de 2024 a las 15:17
I can't figure out how to plot magnitudes of a variable at different (x,y,z) locations. In effect, I need to plot a 4D plot, (x,y,z,value). I thought I'd be able to do a 3D plot and set the 4D as color scale or something like that, but I can't figure how to do that.
Perhaps I'm over thinking this....but, I'd appreciate any help.
Thanks!
Jorge
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Star Strider
el 22 de Ag. de 2024 a las 19:21
@Jorge —
Try this —
LD = load('data')
x = LD.data(:,1);
y = LD.data(:,2);
z = LD.data(:,3);
c = LD.data(:,4);
figure
stem3(x, y, z)
hold on
scatter3(x, y, z, 100, c, 'filled')
hold off
CL = clim;
colormap(turbo)
xlabel('X')
ylabel('Y')
zlabel('Z')
view(130,30)
Zfcn = scatteredInterpolant(x, y, z, 'natural','none'); % Create Surface Matrix
Cfcn = scatteredInterpolant(x, y, c, 'natural','none'); % Create Colour MAtrix
N = numel(x);
xv = linspace(min(x), max(x), N);
yv = linspace(min(y), max(y), N);
[Xm,Ym] = ndgrid(xv, yv);
Zm = Zfcn(Xm, Ym);
Cm = Cfcn(Xm, Ym);
figure
surfc(Xm, Ym, Zm, Cm, 'EdgeColor','interp')
clim(CL)
colormap(turbo)
xlabel('X')
ylabel('Y')
zlabel('Z')
view(130,30)
The only change from my previous answer was using your data. Some parts do not interpolate well and leave gaps, however that appears to be inhereint in your data, at least as far as scatteredInterpolant interprets them.
.
13 comentarios
Star Strider
el 23 de Ag. de 2024 a las 15:17
As always, my pleasure!
The purpose of MATLAB answers is to provide solutions, as well as education in various contexts.
Más respuestas (1)
Aquatris
el 22 de Ag. de 2024 a las 13:34
Editada: Aquatris
el 22 de Ag. de 2024 a las 13:37
Here is one way where you use colors to indicate the magnitude;
% random data
x = [0:pi/50:10*pi nan]; % nan is added to remove connection between first and last data point
y = sin(x);
z = cos(x);
m = x; % magnitude you want as colors, i set it to x cause it looks nice :D
colormap(winter)
patch(x,y,z,m,'Facecolor','none','EdgeColor','interp')
colorbar
view(3)
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