show3d-methods {dti} | R Documentation |
The function provides 3D visualization of "dtiTensor"
and "dtiIndices"
objects using the "rgl"
-package. Functionality of the rgl-package allows to rotate and zoom the displayed object.
## S4 method for signature 'dtiTensor': show3d(obj, nx=NULL, ny=NULL, nz=NULL, center=NULL, method=1, level=0, scale=.25, bgcolor="black", add=FALSE, subdivide=2, smooth=TRUE, maxobjects=729, ...) ## S4 method for signature 'dtiIndices': show3d(obj, index="FA", nx=NULL, ny=NULL, nz=NULL, center=NULL, method=1, level=0, bgcolor="black", add=FALSE, lwd=1, ...)
obj |
An object of class dtiTensor or dtiIndices |
nx |
Number of voxel in x-direction |
ny |
Number of voxel in y-direction |
nz |
Number of slices |
center |
Vector of length 3 specifying the center of the data cube (class dtiTensor ) or center of display (class dtiIndices ) |
method |
method==1 and method==2 specify two different color schemes for
directional FA-maps. |
level |
Minimal FA value of tensors. |
scale |
Scale factor for the size of ellipsoids |
bgcolor |
Backgroundcolor for rgl-display |
add |
If true information is added to the current device, otherwise a new device is opened. |
subdivide |
Level of subdivisions for meshing of ellipsoids, see package rgl. |
smooth |
Use smooted surfaces, see package rgl. |
maxobjects |
Maximal size of data cube (in voxel) to display |
index |
Eiter "FA" for fractional anisotropy index or
"GA" for geodesic anisotropy index. |
lwd |
Line width to use. |
... |
Additional parameters passed to function rgl.par from the rgl-package. |
The function returns the number of the current rgl-device.
index
.
Displayed objects are restricted to voxel with an fractional (geodesic) anisotropy larger than level
.
method
. The fractional anisotropy value is coded as transparency. The value of maxobjects
limits the size of datacube and may be increased
on hardware with suitable graphics capabilities.
Displays can be closed using function rgl.close
Karsten Tabelow tabelow@wias-berlin.de
J"org Polzehl polzehl@wias-berlin.de
dtiIndices-methods
,
dti.smooth
,
dtiTensor
,
dtiIndices
## Not run: demo(dti_art)