MATLAB: How to obtain volume data from X,Y,Z,c data to use slice() function

slicevolume data

If we have X,Y,Z,v data, how can I manage to get Volume data form in order to use slice function?

please check data (data.mat)

first column: x coordinate

second column: y coordinate

third column: z coordinate

fourth column: data

Best Answer

N = 50;
xvec = linspace(592447.8, 592463.9, N);
yvec = linspace(507793.3, 507837.4, N);
zvec = linspace(2553.6,   2559.9, N);
[xq, yq, zq] = meshgrid(xvec, yvec, zvec);
load('data.mat')
x = data(:,1);
y = data(:,2);
z = data(:,3);
c = data(:,4);
F = scatteredInterpolant(x,y,z,c);
vq = F(X, Y, Z);
xslice = something in the x range; 
yslice = something in the y range; 
zslice = something in the z range;
slice(xq, yq, zq, vq, xslice, yslice, zslice)

Related Solutions

MATLAB: 4d plot in order to create a surface with density from 4 vectors ( coordinates of the dots). X, Y, Z and C is the color.

OK. Then, how about the following?

% Load data
load('object.mat')
% Create meshgrid
[xq, yq, zq] = meshgrid(min(x):5:max(x),min(y):5:max(y),min(z):5:max(z));
% Assign data to the grid point
cq = nan(size(xq));
[~, pos] = ismember([x,y,z],[xq(:),yq(:),zq(:)],'rows');
cq(pos) = c;
% Find boundary points location
k = boundary(x,y,z,1);
% Create isosurface levels and color
N = 8;
color = jet(N);
v = linspace(min(c),max(c),N);
% Visualize the result
figure
hold on
for kk = 1:N
    p = patch(isosurface(xq,yq,zq,cq,v(kk)),...
        'FaceColor',    color(kk,:),...
        'EdgeColor',    'none',...
        'FaceAlpha',    0.2);
    isonormals(xq,yq,zq,cq,p)
end
trisurf(k,x,y,z,...
    'Facecolor',     'b',...
    'FaceAlpha',    0.1,...
    'Edgecolor',    'none')
view(120,30); 
camlight('headlight')
lighting gouraud
grid on

MATLAB: Extract output data from meshgrid input

Always more helpful for us if you share 1) your data and 2) the complete error message (all the red text).

This example on the scatteredInterpolant documentation page shows how to use the results of meshgrid to determine vq. Make sure you are using the 4th input correctly. MATLAB expects it to be the sample values, specified as a vector that defines the function values at the sample points, v = F(x,y,z).

Best Answer

Related Solutions

MATLAB: 4d plot in order to create a surface with density from 4 vectors ( coordinates of the dots). X, Y, Z and C is the color.

MATLAB: Extract output data from meshgrid input

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