search for: hvidberg

...9;difftime' object. How do I get an Integer value from that? I tried severel things, incuding the following: > dd <- as(d,"numeric") Error in .classEnv(thisClass) : unable to find an environment containing class "difftime" Sugestions appriciated... :-) Martin at Hvidberg.net

...mean dafP$Pno <- dafP$P * (mean(dafP$P)/dafP$Yav) # Prize Normalized by Year Can any one comment on this: * This code only normalizes so all year get the same mean. How would I go about 'normalizing' to a specific year, eg. 2010? Best Regards Martin -- */ Martin Hvidberg Tanggårdsvej 22 2680 Solrød tlf.: 35 83 01 91 email: Martin@Hvidberg.net /* [[alternative HTML version deleted]]

...alues (dafSmap[,2] * Ay(for a relevant year) / Ag) I tried to write: vecAA <- dafSamp[,2] * Ay[which(Ay[,1]==dafSamp[,1]),2] / Ag but the result is all NAs :-( Might have seen that coming, Not the same length... Question: How do I go about making such calculation? :-) Martin Hvidberg Here is the code in full, if you want to try it... dafSamp <- data.frame(cbind(c(1972,1984,1969,1976,1999,1996,1976,1984,1976),c(117,73,92,113,80,78,98,106,99))) Ag <- mean(dafSamp[,2]) Ag Ay <- aggregate(x=dafSamp[,2], by=list(dafSamp[,1]), FUN='mean') Ay Cy <- agg...

...updating HTML package descriptions > dbf <- read.dbf("test.dbf") Error: could not find function "read.dbf" > Note thet the last line contains an error. Is the package installed or not? How do I get access to use the functionality it offers?? :-? Martin Hvidberg [[alternative HTML version deleted]]

...t support output to file cat(), but it claims that 'sum1' is a list write, but that just uses cat()... The script goes something like this: ... lmMax <- lm(NUMAMMON ~ YYYY*MM*DD) sum1 <- summary(lmMax) # help needed here... how to dump sum1 to a small text file??? ... :-? Martin at Hvidberg.net

...32.5) on an DIGITAL AlphaServer 800 5/500 The program starts up nicely but exits immediately with a "Segmentation fault" at the first command. It seems that it doesn't matter what command, I tried q(), help(), version, licence(), x<-1, etc. All comments are welcomed. :-? Martin Hvidberg > ------ > Martin Hvidberg > M.Sc. Physical Geography, Researcher > > Danish Ministry of Environment > National Environmental Research Institute (NERI) > Department of Atmospheric Environment (ATMI) > > Email: mhv at dmu.dk > Url: www.dmu.dk >...

Dear list I'm plotting ( boxplot() and plot() ) some data for a publication. The editor would like the text labels on the plots in a larger font. I'm doing something like this: <snip> jpeg( filename = "D:/Martin/Work/CleanPath/RAF1%03d.jpg", width = 1000, height = 600, pointsize = 12, quality = 100, bg = "white", res = 96, restoreConsole = TRUE )

...licence(), help(), demo() or any other of the sugested commands I get an error: "Segmentation fault" and the progam exits to the shell prompt. Any sugestions are welcomed... ---------------------------------------------------------------------------- ----------------------------- Martin Hvidberg Geographer, M.Sc. National Environmental Research Institute Phone(direct): +45 46 30 11 55 Dept. of Atmospheric Environment Phone: +45 46 30 12 00 Frederiksborgvej 399 Fax: +45 46 30 12 14 Box 358 E-mail: mhv at dmu.dk DK-4000 Roskilde Location: 55?41'43.1"N 12?06'06.6&q...

I have a data frame (daf1), that holds +80000 records, and 10 variables (i.e. 10 columns and some 80000 rows) > length(daf1) [1] 10 > length(daf1[,1]) [1] 83805 I would like to sample() e.g. 10000 records from this. I use: > daf2 <- sample(daf1, 1000, replace = FALSE, prob = NULL) Error in `[.data.frame`(x, .Internal(sample(length(x), size, replace, : cannot take a sample larger