[R] How to get rid of extra areas on spatial data map

Hello All, I am using sp and maps libraries to have a map for some fire data. The region covered is Mississippi State in the US. Then I would like to add a layer of ecoregion on the top (omenrik layer from nationalatlas.gov). The problem is that the ecoregion layer is larger than the state

[R] garch estimation with exogenouse variables

Hello All, I need to estimate a GARCH model. The mean equation contains exogenous variables like Y = B * X + et. I understand the garch function in tseries package can handle univariate model, and garchFit in fGarch can handle ARMA specification. Is there any function that can handle exogenous

[R] Package ismev, gpd.fit, and interpretation for statistics of extreme values

levels. There are multiple fires on individual calendar days. Each year there are 2000 to 5000 fires. I am not sure how to specify the number of observations per year, i.e., the value of npy and which formulas should be used. Thank you for your help. Edwin Changyou Sun, Ph.D

Re: [R] navigation panel with help

, January 28, 2010 2:19 PM To: Changyou Sun Cc: r-help@r-project.org Subject: Re: [R] navigation panel with help On 28/01/2010 3:15 PM, Edwin Sun wrote: All, I installed the lastest version of R 2.10.1. On the help page for a specific function, it turns out that the vertical navigation panel

[R] Duration model with sample selection (or selectivity)

Hello All, I am interested in estimating a duration model (also known as survival analysis or event-history analysis). I use an economic dataset. In economics terms, the model is duration model with sample selection (or selectivity). The time spell variable is only observed for a sample that

[R] ggplot legend for multiple time series

- data.frame(year=1875:1972, level=LakeHuron) ggplot(huron, aes(year)) + geom_line(aes(y=level+5, colour=above)) + geom_line(aes(y=level-5, colour=below)) + scale_colour_manual(Direction, c(above=black, below=black)) Thanks, Edwin Changyou Sun, Ph.D. Associate Professor