Description: Advanced response surface analyses. The function compares
several nested models (full polynomial, shifted and rotated
squared differences, shifted squared differences, basic squared
differenceds). Provides plotting functions for wireframe
surface, interactive 3d, and contour plots.  Calculates many
surface parameters and provides standard, robust, or
bootstrapped SEs and confidence intervals for them.
Depends: lavaan (>= 0.5.11), plyr, ggplot2, lattice, gridExtra,
Collate: 'RSA.R' 'RSA.ST.R' 'demoRSA.R' 'helpers.R' 'plot.RSA.R'

Description: Advanced response surface analyses. The main function RSA
compares several nested models (full polynomial, shifted and
rotated squared differences, shifted squared differences, basic
squared differences) and provides plotting functions for
wireframe surfaces, interactive 3d plots, and contour plots.
Calculates many surface parameters and provides standard,
robust, or bootstrapped standard errors and confidence
Depends: R (>= 2.15.0), lavaan (>= 0.5.11), plyr, ggplot2, lattice,

Description: Advanced response surface analysis. The main function RSA
rotated squared differences, shifted squared differences,
rising ridge surfaces, basic squared differences) and provides
plotting functions for 3d wireframe surfaces, interactive 3d
plots, and contour plots. Calculates many surface parameters
(a1 to a4, principal axes, stationary point, eigenvalues) and
provides standard, robust, or bootstrapped standard errors and
Suggests: fields, SDMTools, tkrplot, rgl

Description: Advanced response surface analysis. The main function RSA compares
several nested models (full polynomial, shifted and rotated squared
differences, rising ridge surfaces, basic squared differences) and provides
plotting functions for 3d wireframe surfaces, interactive 3d plots, and
contour plots. Calculates many surface parameters (a1 to a4, principal
axes, stationary point, eigenvalues) and provides standard, robust, or
bootstrapped standard errors and confidence intervals for them.
Suggests: fields, SDMTools, tkrplot, rgl, qgraph, aplpack
Depends: R (>= 2.15.0), lavaan (>= 0.5.11), ggplot2, lattice, gridExtra