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subvolume

Extract subset of volume data set

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Syntax

[Nx,Ny,Nz,Nv] = subvolume(X,Y,Z,V,limits)
[Nx,Ny,Nz,Nv] = subvolume(V,limits)
Nv = subvolume(...)

Description

[Nx,Ny,Nz,Nv] = subvolume(X,Y,Z,V,limits)extracts a subset of the volume data setVusing the specified axis-alignedlimits.limits = [xmin,xmax,ymin, ymax,zmin,zmax](AnyNaNs in the limits indicate that the volume should not be cropped along that axis.)

The arraysX,Y, andZdefine the coordinates for the volumeV. The subvolume is returned inNVand the coordinates of the subvolume are given inNX,NY, andNZ.

[Nx,Ny,Nz,Nv] = subvolume(V,limits)assumes the arraysX,Y, andZare defined as

[X,Y,Z] = meshgrid(1:N,1:M,1:P)

where[M,N,P] = size(V).

Nv = subvolume(...)returns only the subvolume.

Examples

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Open Live Script

Load themridata set, which is a collection of MRI slices of a human skull. Then:

  • Squeeze the four-dimensional array into three dimensions and extract a subset usingsubvolume.

  • Use a patch to display an isosurface of the skull outline.

  • Add a second patch with interpolated face colors.

  • Set the view of the object.

  • Change the colormap to a grayscale colormap.

  • Add lights to the right and left of the camera to illuminate the object.

loadmriD = squeeze(D); [x,y,z,D] = subvolume(D,[60,80,nan,80,nan,nan]); p1 = patch(isosurface(x,y,z,D, 5),...'FaceColor','red','EdgeColor','none'); isonormals(x,y,z,D,p1); p2 = patch(isocaps(x,y,z,D, 5),...'FaceColor','interp','EdgeColor','none'); view(3); axistight;daspect([1 1 0.4]) colormap(gray(100)) camlightright;camlightleft;lightinggouraud

See Also

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Introduced before R2006a

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