• About DI
• Home
• Installation
• Manual/Tutorial   
• Example Dataset
• Related Software
• Fields
• Funfits

Design Interface ... DI

DI contains graphical and interactive tools for evaluating and modifying spatial designs. This current development version is targeted to support the EPA in determining the sensitivity and coverage of air quality monitoring networks for different pollutants. DI is written in the S language with S-PLUS® GUI extensions and currently runs on S-PLUS for Windows. It includes "point and click" based functions for easy use but also supports more deliberate spatial analysis through a suite of traditional S functions from the package Fields.

DI is a library of functions and datasets. Some of these functions create the GUI boxes used to setup plots while others compute the necessary statistics. Part of DI's usefulness is that an experienced S-PLUS user can do some spatial analysis using command-line functions and then present the final results using the DI GUI functions. At the lowest conceptual level, DI manipulates two kinds of objects: a covariance object and a network object.

Briefly, the covariance object is used to define a spatial dependencies for a given set of observations. At a minimum, the network object has the network locations and an associated covariance object. The functions in DI are used to create or modify a network object or are used to examine the accuracy when spatial predictions are made from observations on this network.

DI is developed by Eric Gilleland and Doug Nychka and draws on previous work by Nancy Saltzman and J. Andrew Royle.

Major Methods

More Functions

• equal.axis
• offnw.prob
• plot.network
• plot.network.setup
• se.image

UCAR : NCAR : CISL : IMAGe :   DAI   TNT   GSP
For problems with the page, contact Tim Hoar - thoar 'at' ucar 'dot' edu

© 2005, UCAR | Privacy Policy | Terms of Use | Contact UCAR | Visit UCAR | Sponsored by