Draw the eigenstructure analysis (ESA) biplot in rgl (3D device).
The 3D biplot opens an interactive
3D device that can be rotated and zoomed using the mouse.
A 3D device facilitates the exploration of grid data as
significant proportions of the sumofsquares are often
represented beyond the first two dimensions. Also, in a lot of
cases it may be of interest to explore the grid space from
a certain angle, e.g. to gain an optimal view onto the set
of elements under investigation (e.g. Raeithel, 1998).
Note that the eigenstructure analysisis just a special case
of a biplot that can also be produced using the
biplot3d
function with the arguments
center=4, g=1, h=1
.
1  biplotEsa3d(x, center=1, g=1, h=1, ...)

x 

center 
Numeric. The type of centering to be performed.
0= no centering, 1= row mean centering (construct),
2= column mean centering (elements), 3= doublecentering (construct and element means),
4= midpoint centering of rows (constructs).
Default is 
g 
Power of the singular value matrix assigned to the left singular vectors, i.e. the constructs. 
h 
Power of the singular value matrix assigned to the right singular vectors, i.e. the elements. 
... 
Additional arguments to be passed to 
Mark Heckmann
Unsophisticated biplot: biplotSimple
;
2D biplots:
biplot2d
,
biplotEsa2d
,
biplotSlater2d
;
Pseudo 3D biplots:
biplotPseudo3d
,
biplotEsaPseudo3d
,
biplotSlaterPseudo3d
;
Interactive 3D biplots:
biplot3d
,
biplotEsa3d
,
biplotSlater3d
;
Function to set view in 3D:
home
.
1 2 3 4 5 6 7 8 9 10 11 12  ## Not run:
biplotEsa3d(boeker)
biplotEsa3d(boeker, unity3d=T)
biplotEsa3d(boeker, e.sphere.col="red",
c.text.col="blue")
biplotEsa3d(boeker, e.cex=1)
biplotEsa3d(boeker, col.sphere="red")
## End(Not run)

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