# biplotSlater3d: Draw the Slater's INGRID biplot in rgl (3D device). In markheckmann/OpenRepGrid: Tools to Analyze Repertory Grid Data

## 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

 `1` ```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.

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

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```## Not run: 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") ## End(Not run) ```

markheckmann/OpenRepGrid documentation built on April 30, 2021, 2:33 a.m.