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Dear R People: Could someone recommend a small example for spline regression, please? I would like to show this to my students, step by step. Thanks in advance, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodgess at gmail.com

...cale so you can get a general feel of how they would look when printed non-color, or copied, etc. SensSpec.demo, a demonstration of how to compute positive and negative predictive value from sensitivity, specificity, and prevelance using a virtual population rather than Bayes Theorem and algebra. TkApprox and TkSpline, GUI wrappers to the approxfun and splinfun functions that graph your data, the predictions, and allow you to drag reference lines on the plot to show the predicted values, differences, and derivatives. tkprogress, a utility to create and update a progress bar to show how far through...

...cale so you can get a general feel of how they would look when printed non-color, or copied, etc. SensSpec.demo, a demonstration of how to compute positive and negative predictive value from sensitivity, specificity, and prevelance using a virtual population rather than Bayes Theorem and algebra. TkApprox and TkSpline, GUI wrappers to the approxfun and splinfun functions that graph your data, the predictions, and allow you to drag reference lines on the plot to show the predicted values, differences, and derivatives. tkprogress, a utility to create and update a progress bar to show how far through...

Hi, I'm dealing with a lattice plot inserted into a tk widget and would like to know when a user has clicked on the plot area of a plot (i.e. inside the axes). For example, library(tkrplot) library(lattice) tt <- tktoplevel() makePlot <- function() print(xyplot(1 ~ 1)) printCoords <- function(x, y) print(c(x, y)) img <- tkrplot(tt, makePlot) tkbind(img, "<1>",

Readers, I have looked at various documents hosted on the web site; I couldn't find anything on interpolation. So I started r and accessed the help (help.start()). (by the way is it possible to configure r to open help in opera instead of firefox?) Initially I read the help for the akima package but couldn't understand it. Next I tried the asplines package help. I tried to copy the

Hey all, Suppose a=b^2 for starters. I want to be able to create a graph that displays a initially and if i was to click on 'a' to show 'b' on the chart itself. Does anyone know if this is possible in R? Also as an extension (not necessary as yet) to output the above into a 'html' file. Thanks, Sachin --- Please consider the environment before printing this email ---