MATLAB Function Reference |
Syntax
Description
XY = stream2(x,y,u,v,startx,starty)
computes streamlines from vector data u
and v
. The arrays x
and y
define the coordinates for u
and v
and must be monotonic and 2-D plaid (such as the data produced by meshgrid
). startx
and starty
define the starting positions of the streamlines. The section "Specifying Starting Points for Stream Plots provides more information on defining starting points.
The returned value XY
contains a cell array of vertex arrays.
XY = stream2(u,v,startx,starty)
assumes the arrays x
and y
are defined as [x,y] = meshgrid(1:n,1:m)
where [m,n] = size(u)
.
XY = stream2(...,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:
If you do not specify a value, MATLAB uses the default:
Use the streamline
command to plot the data returned by stream2
.
Examples
This example draws 2-D streamlines from data representing air currents over regions of North America.
load wind [sx,sy] = meshgrid(80,20:10:50); streamline(stream2(x(:,:,5),y(:,:,5),u(:,:,5),v(:,:,5),sx,sy));
See Also
Volume Visualization for related functions
Specifying Starting Points for Stream Plots for related information
strcmpi | stream3 |
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