MATLAB Function Reference |
Interpolate stream line vertices from flow speed
Syntax
interpstreamspeed(X,Y,Z,U,V,W,vertices) interpstreamspeed(U,V,W,vertices) interpstreamspeed(X,Y,Z,speed,vertices) interpstreamspeed(speed,vertices) interpstreamspeed(X,Y,U,V,vertices) interpstreamspeed(U,V,vertices) interpstreamspeed(X,Y,speed,vertices) interpstreamspeed(speed,vertices) interpstreamspeed(...,sf) vertsout = interpstreamspeed(...)
Description
interpstreamspeed(X,Y,Z,U,V,W,vertices)
interpolates streamline vertices based on the magnitude of the vector data U
, V
, W
. The arrays X
, Y
, Z
define the coordinates for U
, V
, W
and must be monotonic and 3-D plaid (as if produced by meshgrid
).
interpstreamspeed(U,V,W,vertices)
assumes X
, Y
, and Z
are determined by the expression
interpstreamspeed(X,Y,Z,speed,vertices)
uses the 3-D array speed
for the speed of the vector field.
interpstreamspeed(speed,vertices)
assumes X
, Y
, and Z
are determined by the expression
interpstreamspeed(X,Y,U,V,vertices)
interpolates streamline vertices based on the magnitude of the vector data U
, V
. The arrays X
, Y
define the coordinates for U
, V
and must be monotonic and 2-D plaid (as if produced by meshgrid
)
interpstreamspeed(U,V,vertices)
assumes X
and Y
are determined by the expression
interpstreamspeed(X,Y,speed,vertices)
uses the 2-D array speed
for the speed of the vector field.
interpstreamspeed(speed,vertices)
assumes X
and Y
are determined by the expression
interpstreamspeed(...,sf)
uses sf
to scale the magnitude of the vector data and therefore controls the number of interpolated vertices. For example, if sf
is 3, then interpstreamspeed
creates only one-third of the vertices.
vertsout = interpstreamspeed(...)
returns a cell array of vertex arrays.
Examples
This example draws streamlines using the vertices returned by interpstreamspeed
. Dot markers indicate the location of each vertex. This example enables you to visualize the relative speeds of the flow data. Streamlines having widely spaced vertices indicate faster flow; those with closely spaced vertices indicate slower flow.
load wind [sx sy sz] = meshgrid(80,20:1:55,5); verts = stream3(x,y,z,u,v,w,sx,sy,sz); iverts = interpstreamspeed(x,y,z,u,v,w,verts,.2); sl = streamline(iverts); set(sl,'Marker','.') axis tight; view(2); daspect([1 1 1])
This example plots streamlines whose vertex spacing indicates the value of the gradient along the streamline.
z = membrane(6,30); [u v] = gradient(z); [verts averts] = streamslice(u,v); iverts = interpstreamspeed(u,v,verts,15); sl = streamline(iverts); set(sl,'Marker','.') hold on; pcolor(z); shading interp axis tight; view(2); daspect([1 1 1])
See Also
stream2
, stream3
, streamline
, streamslice
, streamparticles
Volume Visualization for related functions
interpn | intersect |
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