OpenRepGrid (version 0.1.9)

reorder2d: Order grid by angles between construct and/or elements in 2D.

Description

The approach is to reorder the grid matrix by their polar angles on the first two principal components from a data reduction technique (here the biplot, i.e. SVD). The function reorder2d reorders the grid according to the angles between the x-axis and the element (construct) vectors derived from a 2D biplot solution. This approach is apt to identify circumplex structures in data indicated by the diagonal stripe in the display (see examples).

Usage

reorder2d(x, dim = c(1, 2), center = 1, normalize = 0, g = 0, h = 1 - g, rc = TRUE, re = TRUE, ...)

Arguments

x

repgrid object.

dim

Dimension of 2D solution used to calculate angles (default c(1,2)).

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). The default is 1 (row centering).

normalize

A numeric value indicating along what direction (rows, columns) to normalize by standard deviations. 0 = none, 1= rows, 2 = columns (default is 0).

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.

rc

Logical. Reorder constructs by similarity (default TRUE).

re

Logical. Reorder elements by similarity (default TRUE).

...

Not evaluated.

Value

Reordered repgrid object.

Examples

## Not run: 
# 
#    x <- feixas2004
#    reorder2d(x)            # reorder grid by angles in first two dimensions
#    reorder2d(x, rc=F)      # reorder elements only
#    reorder2d(x, re=F)      # reorder constructs only
# ## End(Not run)