[R] FW: New public-use Education Longitudinal Study of 2002 Base Year to 2006 Second Follow-up data set released

from readers of this list with expertise in using R for analysis of longitudinal data and interest in collaborating on educational studies. Art ___ Art Burke Associate Education Northwest 101 SW Main St, Suite 500 Portland OR 97204-3213 art.bu

[R] Retrieving the matched data frame from Matching?

I'm trying to use the Matching package to create a matched dataset but I'm having trouble retrieving the data frame where the comparison cases are identified. Could someone please give me a pointer on how to do this? The call was a simple one and seems to have worked with no errors ... m8 <- Ma

[R] Help with grouped barplot

Given the data structure below, how can I create a bar plot for the values of disc for each area grouped by year? bar <-structure(list(year = c(2003, 2003, 2003, 2003, 2003, 2003, 2003, 2007, 2007, 2007, 2007, 2007, 2007, 2007), area = structure(c(6L, 4L, 1L, 2L, 3L, 5L, 7L, 6L, 4L, 1L, 2L, 3L,

[R] Help spruce up a ggplot graph

= year), size = 1) + scale_y_continuous(name='Percent Well Prepared', limits=c(0, 100)) + scale_colour_discrete('Year') + xlab('') Thanks! Art ___ Art Burke Associate Education Northwest 101 SW Main St, Suite 500 Portland OR 97

[R] update.packages fail

update.packages has suddenly stopped working for me (after working fine yesterday). My default mirror is at Oregon State University, but I get the following warning even after setting another mirror. Other Internet connections are working on my computer. Suggestions, please. > update.packages

[R] How to place a title with layout?

Could someone please remind me how to place a title when using layout? For example, how could I place "This is a demo of layout" as a title for the following, assuming it should go top center? layout(matrix(c(1,2,3,4), 2, 2, byrow = TRUE)) replicate(4, plot(density(rnorm(10 Art ___