similar to: round Date object to 10 minutes intervals?

Hi all, I have the following problem: I have a csv-file consisting of timestamp values (no dates), e.g.: Timestamp1;Timestamp2; 05:24:43;05:25:05; 15:47:02;15:47:22; 18:36:05;18:36:24; 15:21:24;15:22:04; I need a vector with the difference of the two timestamps, so I read the data with the read.csv-function: myObj <- read.csv("file.csv",header=TRUE,sep=";"). I have then

Hi all, I bumped into this awkward zoo behaviour. I'd be half tempted to call it a bug, what do you think? It's annoying to work around it :( I wonder if this was the behaviour of older zoo versions, I can't remember coming across this sort of thing... > version _ platform i386-pc-solaris2.10 arch i386 os solaris2.10 system i386,

hi, i am running R with JGR and Deducer under Ubuntu Mint Lucid. since i updated to R 2.12 i can no longer make graphs - R just crashes. the full error report was posted to launchpad (https://bugs.launchpad.net/ubuntu/+source/openjdk-6/+bug/675905) without any success so far. anyone with a similar problem or helpful suggestions? thanks! kat

hi all, after fitting a multiple linear regression model <- lm(y ~ a + b+ c+d) i wanted to plot diagnostics plot(model) but get the error message Error in object$coefficients : $ operator is invalid for atomic vectors. which does not make a lot of sense, since there is no "$" - i am working with an attached dataset. can anyone help, please?? thanks a lot, kat

Hi, how can I use rm() on objects named like: paste("site",i,"_data",sep="") while looping through i? I tried rm(paste("site",i,"_data",sep="")) but I get the error that rm() must contain names or text strings which is confusing me as I thought paste() would create something like that...? Thanks, Katharina -- Time flies

Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in advance returns the number of the function which has to be called next. Now I want to combine 'NameOfFunction' with the 'Number' returned so that i can call the desired function. I

Hello, I have a dataframe containing various time series (not time series objects though!)with hourly time steps. I?d like to perform ccf for I need to know the correlation factors for different lags. Here is an example: x<-as.POSIXct(c("2008-12-25 16:00:00", "2008-12-25 17:00:00", "2008-12-25 18:00:00", "2008-12-25 19:00:00", "2008-12-25

Dear all, I would like to produce a map with information about the patenting activity in German districts, by coloring districts with different degrees of patenting activity in different colors. I work with the packages maptools, maps and spdep. The map data is read from an external .shp file (+ the corresponding .shx and .dbf files). Plotting a map with the IDs or the patenting indicator itself

Hi there, I'm a bit confused concerning the axis tck setting in the lattice package as the ticks on left sided axis aren't drawn at all with the following setting: dados <- data.frame(varsep = factor(rep(1:2,10)), i = runif(20)) library(lattice) my.theme <- list( axis.components = list(left = list(tck = 1, pad1 = 1, pad2 = 2), top = list(tck = 0, pad1

Hi, I've got the following problem which I cannot think of a solution right now: if got a lattice xyplot in black and white and a grouping variable with many (more than 8 values) and I plot it as regression lines (type="r"), just like this one (not reproducable but that's I guess not the point here): xyplot(log(AGWB) ~ log(BM_roots), data=sub_agwb_data, groups=species,

Hello, I have a dataframe assigning various scores on around 20 variables to a list of countries. The scores are rated on a scale of (D, C, B, A) and there are also some not rated ones (NR) and others are left blank (NA). I now wanted to transfer the scores into numeric values (such as NR=0, D=25, C=50, B=27, A=100), while also leaving the NA in the dataframe. Can I transform the whole

Hi, there´s something that really bothers me about R and after hours and hours of internet research, I´m still stuck with the same problem: I installed R and it is in Spanish, as the system on my work. I would really like it in English and there seems to be no way to change that!?! I´m doing an abroad internship, so my Spanish is far from perfect and my tutorial is in English. Is there any

Hi, how do I create a string of the comma-separated content of a vector? I've got the vector i with several numeric values as content: >str(i) num 99 and want to create a SQL statement to look like the following where the part '(2, 4, 6, 7)' should be the content of the vector i: select * from [biomass_data$] where site_no in (2, 4, 6, 7) Here my approach (which doesn't

Hi there, I've got a question which is really trivial for sure but still I have to ask as I'm not making any progress solving it by myself (please be patient with an undergraduate student): I've got a linear model (lm and lmer fitted with method="ML"). Now I want to compare the coefficients (slope, intercept, not the random effects) of both models with a given value (e.g.

Hello, I'm trying to use na.spline (package zoo) to fill some missing data in a time series. this works fine, however, if I apply the 'maxgap' argument, I always get the error: <------ Error in na.spline.vec(x., coredata(object.), xout = xout., ...) : attempt to apply non-function ------> I couldn't find a similar error for this case in the mailing lists and zoo vignette,

hi, is there a way to make r open the help file in a separate window? i'm quite new to linux(kubuntu) and used to work with r under windows... thanks, katharina

Hi everyone, is it possible to write a certain value beside a point in a plot? I'm plotting the following: plot(coefficient$intercept ~ coefficient$average_BM_leaves_needles, main="intercepts ::: BM_leaves_needles", ylab="intercepts", xlab="average BM_leaves_needles per site [kg]") and I want to have the value of coefficient$site_no written beside each

Hi! I am currently using Sweave for writing my bachelor thesis - and I have a problem: I am using a LaTeX style (report) with quite big margin spaces. The Sweave generated LaTeX code "floats" into the margin - and it looks ugly. The text is blocked and fine... then there comes some flattering code running over the margin... and blocked text again. Considering the LaTeX output, I guess

hi, i am trying to work with the survey package in order to apply survey design weights. the data set i am using - ess - contains missing values. my question: when using svytable(~variable1+variable2, design=my.svydesign.object, na.rm=T) the resulting crosstable contains all missings although i defined the na's as such. any ideas??? thanks a lot, katharina

Hi there, sorry for troubling everybody once again, I've got a problem rewriting Sarkar's function for rewriting the tick locations in a logaritmic way (s. http://lmdvr.r-forge.r-project.org/code/Chapter08.R): His example works for log 2 but I need log e (natural logarithm). My problem is that if I replace 2 with "e" (using paste()), I get the error message that the location