## Documentation Center |

Plot streamlines in slice planes

`streamslice(X,Y,Z,U,V,W,startx,starty,startz)streamslice(U,V,W,startx,starty,startz)streamslice(X,Y,U,V)streamslice(U,V)streamslice(...,density)streamslice(...,'`

`streamslice(X,Y,Z,U,V,W,startx,starty,startz)`
draws well-spaced streamlines (with direction arrows) from vector
data `U`, `V`, `W` in
axis aligned *x*-, *y*-, *z*-planes
at the points in the vectors `startx`, `starty`, `startz`.
The section Specifying
Starting Points for Stream Plots provides more information
on defining starting points.

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`. `U`, `V`, `W` must
be m-by-n-by-p volume arrays.

Do not assume that the flow is parallel to the slice plane.
For example, in a stream slice at a constant `z`,
the `z` component of the vector field `W` is
ignored when you are calculating the streamlines for that plane.

Stream slices are useful for determining where to start streamlines, stream tubes, and stream ribbons.

`streamslice(U,V,W,startx,starty,startz)`
assumes `X`, `Y`, and `Z` are
determined by the expression

[X,Y,Z] = meshgrid(1:n,1:m,1:p)

where `[m,n,p] = size(U)`.

`streamslice(X,Y,U,V)` draws
well-spaced streamlines (with direction arrows) from vector volume
data `U`, `V`.

The arrays `X` and `Y`, which
define the coordinates for `U` and `V`,
must be monotonic, but do not need to be uniformly spaced. `X` and `Y` must
have the same number of elements, as if produced by `meshgrid`.

`streamslice(U,V)` assumes `X`, `Y`,
and `Z` are determined by the expression

[X,Y,Z] = meshgrid(1:n,1:m,1:p)

where `[m,n,p] = size(U)`.

`streamslice(...,density)`
modifies the automatic spacing of the streamlines. `density` must
be greater than `0`. The default value is `1`;
higher values produce more streamlines on each plane. For example, `2` produces
approximately twice as many streamlines, while `0.5` produces
approximately half as many.

`streamslice(...,'arrowsmode')`
determines if direction arrows are present or not.

`arrows`— Draw direction arrows on the streamlines (default).`noarrows`— Do not draw direction arrows.

`streamslice(..., 'method')`
specifies the interpolation method to use.

`linear`— Linear interpolation (default)`cubic`— Cubic interpolation`nearest`— Nearest-neighbor interpolation

See `interp3` for more information on interpolation
methods.

`streamslice(axes_handle,...)`
plots into the axes object with the handle `axes_handle` instead
of into the current axes object (`gca`).

`h = streamslice(...)` returns
a vector of handles to the line objects created.

`[vertices arrowvertices] = streamslice(...)`
returns two cell arrays of vertices for drawing the streamlines and
the arrows. You can pass these values to any of the streamline drawing
functions (`streamline`, `streamribbon`, `streamtube`).

`contourslice` | `interp2` | `interp3` | `meshgrid` | `slice` | `streamline` | `streamribbon` | `streamtube` | `volumebounds`

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