OpenRepGrid (version 0.1.14)

biplotSlater3d: Draw the Slater's INGRID biplot in rgl (3D device).

Description

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 sum-of-squares 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 Slater's biplot is just a special case of a biplot that can be produced using the biplot3d function with the arguments center=1, g=1, h=1.

Usage

biplotSlater3d(x, center = 1, g = 1, h = 1, ...)

Arguments

x

repgrid object.

center

Numeric. The type of centering to be performed. 0= no centering, 1= row mean centering (construct), 2= column mean centering (elements), 3= double-centering (construct and element means), 4= midpoint centering of rows (constructs). Default is 1 (row i.e. construct centering).

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 biplot3d.

See Also

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.

Examples

if (FALSE) {

   biplotSlater3d(boeker)
   biplotSlater3d(boeker, unity3d=T)

   biplotSlater3d(boeker, e.sphere.col="red",
                  c.text.col="blue")
   biplotSlater3d(boeker, e.cex=1)
   biplotSlater3d(boeker, col.sphere="red")

}