slice

Volume slice planes

Description

example

slice(X,Y,Z,V,xslice,yslice,zslice) draws slices for the volumetric data V. Specify X,Y, and Z as the coordinate data. Specify xslice, yslice, and zslice as the slice locations using one of these forms:

• To draw one or more slice planes that are orthogonal to a particular axis, specify the slice arguments as a scalar or vector.

• To draw a single slice along a surface, specify all the slice arguments as matrices that define a surface.

slice(V,xslice,yslice,zslice) uses the default coordinate data for V. The (x,y,z) location for each element in V is based on the column, row, and page index, respectively.

example

slice(___,method) specifies the interpolation method, where method can be 'linear' (the default), 'cubic', or 'nearest'. Use this option with any of the input arguments in previous syntaxes.

slice(ax,___) plots into the specified axes, instead of the current axes (gca).

s = slice(___) returns the Surface objects created. slice returns one Surface object for each slice.

Examples

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Show volumetric data along slice planes that are orthogonal to each axis.

Create slice planes through the volume defined by $v=x{e}^{-{x}^{2}-{y}^{2}-{z}^{2}}$, where x, y, and z range from [-2,2]. Create slice planes orthogonal to the x-axis at the values -1.2, 0.8, and 2 and orthogonal to the z-axis at the value 0. Do not create any slice planes that are orthogonal to the y-axis by specifying an empty array.

[X,Y,Z] = meshgrid(-2:.2:2);
V = X.*exp(-X.^2-Y.^2-Z.^2);

xslice = [-1.2,0.8,2];
yslice = [];
zslice = 0;
slice(X,Y,Z,V,xslice,yslice,zslice)

Show volumetric data along a nonplanar slice. Define the surface where you want to show the volumetric data.

Create volume array V as the volume defined by $v=x{e}^{-{x}^{2}-{y}^{2}-{z}^{2}}$, where x, y, and z range from [-5,5]. Then, show a slice of the volume data along the surface defined by $z={x}^{2}-{y}^{2}$.

[X,Y,Z] = meshgrid(-5:0.2:5);
V = X.*exp(-X.^2-Y.^2-Z.^2);

[xsurf,ysurf] = meshgrid(-2:0.2:2);
zsurf = xsurf.^2-ysurf.^2;
slice(X,Y,Z,V,xsurf,ysurf,zsurf)

Create a slice plane through volumetric data. Specify the interpolation method for the data values.

Create a slice plane orthogonal to the x-axis at the value 0.8. Since the volume data is not defined for x values of 0.8, the slice function interpolates the nearby values. To use the nearest data point value, specify the interpolation method as 'nearest'.

[X,Y,Z] = meshgrid(-2:2);
V = X.*exp(-X.^2-Y.^2-Z.^2);
xslice = 0.8;
yslice = [];
zslice = [];
slice(X,Y,Z,V,xslice,yslice,zslice,'nearest')

Input Arguments

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x-axis coordinate data, specified as a vector or a 3-D array the same size as V. If you specify a 3-D array, it must be monotonic and orthogonally spaced, as if produced by the meshgrid function.

Data Types: single | double

y-axis coordinate data, specified as a vector or a 3-D array the same size as V. If you specify a 3-D array, it must be monotonic and orthogonally spaced, as if produced by the meshgrid function.

Data Types: single | double

z-axis coordinate data, specified as a vector or a 3-D array the same size as V. If you specify a 3-D array, it must be monotonic and orthogonally spaced, as if produced by the meshgrid function.

Data Types: single | double

Volume data, specified as a 3-D array.

Data Types: single | double

x-axis slice values, specified in one of these forms:

• Scalar — Draw one slice plane orthogonal to the x-axis at the specified location.

• Vector — Draw multiple slice planes orthogonal to the x-axis at the specified locations.

• [] — Do not draw any slice planes.

• Matrix — Draw the slice along a surface, instead of a plane. If you use this option, then yslice and zslice also must be matrices that are the same size.

Example: [2 4] draws slice planes orthogonal to the x-axis at the values 2 and 4.

Data Types: single | double

y-axis slice values, specified in one of these forms:

• Scalar — Draw one slice plane orthogonal to the y-axis at the specified location.

• Vector — Draw multiple slice planes orthogonal to the y-axis at the specified locations.

• [] — Do not draw any slice planes.

• Matrix — Draw the slice along a surface, instead of a plane. If you use this option, then xslice and zslice also must be matrices that are the same size.

Example: [2 4] draws slice planes orthogonal to the y-axis at the values 2 and 4.

Data Types: single | double

z-axis slice values, specified in one of these forms:

• Scalar — Draw one slice plane orthogonal to the z-axis at the specified location.

• Vector — Draw multiple slice planes orthogonal to the z-axis at the specified locations.

• [] — Do not draw any slice planes.

• Matrix — Draw the slice along a surface, instead of a plane. If you use this option, then xslice and yslice also must be matrices that are the same size.

Example: [2 4] draws slice planes orthogonal to the z-axis at the values 2 and 4.

Data Types: single | double

Interpolation method, specified as one of these values:

• 'linear' — Linear interpolation of the values at neighboring grid points in each respective dimension

• 'cubic' — Cubic interpolation of the values at neighboring grid points in each respective dimension

• 'nearest' — Nearest grid point value

Target axes, specified as an Axes object. If you do not specify the axes, then slice plots into the current axes.