stream3
Compute 3-D streamline data
Syntax
XYZ = stream3(X,Y,Z,U,V,W,startx,starty,startz)
XYZ = stream3(U,V,W,startx,starty,startz)
XYZ = stream3(...,options)
Description
XYZ = stream3(X,Y,Z,U,V,W,startx,starty,startz)
computes streamlines from vector data U, V, W.
The arrays X, Y, and Z,
which define the coordinates for U, V,
and W, must be monotonic, but do not need to be
uniformly spaced. X, Y, and Z must
have the same number of elements, as if produced by meshgrid.
startx, starty, and startz define the
starting positions of the streamlines.
The returned value XYZ contains a cell array
of vertex arrays.
XYZ = stream3(U,V,W,startx,starty,startz)
assumes the arrays X, Y, and Z are
defined as [X,Y,Z] = meshgrid(1:N,1:M,1:P) where [M,N,P]
= size(U).
XYZ = stream3(...,options)
specifies the options used when creating the streamlines. Define options as
a one- or two-element vector containing the step size or the step
size and the maximum number of vertices in a streamline:
[stepsize]
or
[stepsize, max_number_vertices]
If you do not specify values, MATLAB® software uses the default:
Step size = 0.1 (one tenth of a cell)
Maximum number of vertices = 10000
Use the streamline command
to plot the data returned by stream3.
Examples
Plot 3-D Streamlines
Plot 3-D streamlines from data representing air currents over regions of North America.
load wind
[sx,sy,sz] = meshgrid(80,20:10:50,0:5:15);
streamline(stream3(x,y,z,u,v,w,sx,sy,sz))
view(3);