- Response-surface methods have to do with conducting a series of small experiments to find the optimum operating conditions for a process. The rsm package provides tools for designing response-surface experiments, analyzing the results, finding promising new settings for future experiments, and visualization of fitted response surfaces.
- The package has three vignettes that will help orient the first-time user. An overview of the package -- also available via
vignette("rsm", package = "rsm")describes all of its functionality. A tutorial -- also available viavignette("rs-illus", package = "rsm")-- gives an illustration of how the package is used. And one on rsm's plotting capabilities -- also available viavignette("rsm-plots", package = "rsm")-- shows how to construct contour, image, or perspective plots. - Includes support for a coded-data structure, important for expressing the design layout relative to a central location.
- Standard first- and second-order designs may be generated and appropriately randomized.
- Facilities are provided for augmenting a design -- for example, adding a foldover block or a set of axis points.
- The
rsmfunction is a special extension oflmthat facilitates fitting and evaluating first- and second-order models. Special functionsFO(),SO(),PQ(), andTWI()are used to generate first-order, second-order, pure quadratic, and two-way-interaction predictors for a model. - Functions such as
steepest()allow for finding follow-up experiments in terms of coded or decoded predictors. - Graphical tools are provided for creating contour and other plots -- not just for
rsmobjects, abut for anylmobject with continuous predictors.
- To install latest version from CRAN, run
install.packages("rsm")
Release notes for the latest CRAN version are found at http://cran.r-project.org/web/packages/rsm/NEWS -- or do news(package = "rsm") for notes on the version you have installed.
- To install the latest development version from Github, have the newest devtools package installed, then run
devtools::install_github("rvlenth/rsm", dependencies = TRUE)
For latest release notes on this development version, see the NEWS file