search for: romocea

Dear useRs, I have a function that creates several global objects with assign("obj",obj,.GlobalEnv), and which I need to run iteratively in another function. The code is similar to f <- function(...) { assign("obj",obj,.GlobalEnv) } fct <- function(...) { for (i in 1:1000) { ... f(...) ...obj... rm(obj) #code fails without this line } } I don't understand

Dear useRs, I have a data frame and I want to plot all rows. Each row is represented as a line that links the values in each column. The plot looks like this: dfr <- data.frame(A=sample(1:50,10),B=sample(1:50,10), C=sample(1:50,10),D=sample(1:50,10)) xa <- 10*1:4 plot(c(10,40),c(0,50)) for (i in 1:nrow(dfr)) { lines(xa,dfr[i,],pch=20,type="o") } Things get more complicated

Dear R users, I'm interested in a combination of a scatterplot and an image graph. I have two large vectors. Because in the scatterplot some areas are sparsely and others densely populated, I want to see the points, and I also want their color to be changed based on their density (similar to a heat map). Is there a function that can do that? Thank you, b.

Dear R users, I have a column with dates (character) in a data frame: 12-Jan-01 11-Jan-01 10-Jan-01 9-Jan-01 8-Jan-01 5-Jan-01 and I need to convert them to (Julian) dates so that I can sort the whole data frame by date. I thought it would be very simple, but after checking the documentation and the list I still don't have something that works. 1. as.Date returns the error below. What am I

Dear R users, I have a function (below) which encompasses several tests. However, when I run it, only the output of the last test is displayed. How can I ensure that the function root(var) will run and display the output from all tests, and not just the last one? Thank you, b. root <- function(var) { #---Phillips-Perron PP.test(var, lshort = TRUE) PP.test(var, lshort = FALSE)

...not based on a longest length of runs of same events. To be more specific, for example, from a series, HHTHTTTTHHH, the number of runs are 5, and the longest length of runs of the same events is 4. I'll check for the website you mentioned below. Kyong -----Original Message----- From: bogdan romocea [mailto:br44114@gmail.com] Sent: Thursday, December 27, 2007 12:08 PM To: kyong.ho.park@us.army.mil Cc: r-help Subject: RE: [R] A function for random test based on longest run (UNCLASSIFIED) > require(tseries) > ?runs.test Also, take a look at dieharder, it implements a large number of...

Dear R users, This is a KDE beginner's question. I have this distribution: > length(cap) [1] 200 > summary(cap) Min. 1st Qu. Median Mean 3rd Qu. Max. 459.9 802.3 991.6 1066.0 1242.0 2382.0 I need to compute the sum of the values times their probability of occurence. The graph is fine, den <- density(cap, from=min(cap), to=max(cap), give.Rkern=F)

Hello, Please forget me if I am asking something that is well documented. I have read documentation but there are points that are not clear for me. I am not expert in R nor Databases, but if someone direct me to a tutorial, I will appreciate it.. 1. In my understanding, I can install and use RMySQL withouth having to install MySQL in my PC, to have access to and to create new tables . Is this

...at saic.com ` \ -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] Sent: Friday, October 07, 2005 3:22 AM To: francoisromain at free.fr Cc: R-help at stat.math.ethz.ch; karin.lagesen at medisin.uio.no; bogdan romocea Subject: [R] The R Graph Gallery {was boxplot statistics} >>>>> "Romain" == Romain Francois <francoisromain at free.fr> >>>>> on Thu, 06 Oct 2005 23:23:12 +0200 writes: Romain> Selon bogdan romocea <br44114 at gmail.com>: >>...

Dear useRs, I timed the same code (simulation with for loops) on the same box (dual Xeon EM64T, 1.5 Gb RAM) under 3 OSs and was surprised by the results: Windows XP Pro (32-bit): Time difference of 5.966667 mins 64-bit GNU/Linux (Fedora Core 4): Time difference of 6.966667 mins 32-bit GNU/Linux (FC4): Time difference of 9.2 mins (R 2.1.0 binaries downloaded from CRAN) I searched the

Dear useRs, How come the first attempt to sort a POSIXt vector fails (Error: non-atomic type in greater), while the second succeeds? (Code inserted below.) The documentation says that POSIXt is used to allow operations such as subtraction, so I'd expect sorting to work. Is this perhaps an OS issue? (I run R 2.0.1 on Win xp.) Thank you, b. #------------code test <- c("2005-02-08

Dear R users, I need to rename the columns of a series of data frames. The names of the data frames and those of the columns need to be pulled from some vectors. I tried a couple of things but only got errors. What am I missing? #---create data frame dframes <- c("a","b","c") assign(dframes[2],data.frame(11:20,21:30)) #---rename the columns cols <-

Dear R users, I have a data frame which I create with read.csv and then order by date: d <- na.omit(read.csv(...)) d <- d[order(as.Date(as.character(d$Date), format="%d-%b-%y"), decreasing=F, na.last=F),] My problem is that even though the data frame is ordered as requested, the old row numbers are preserved. For example: * Before sorting: > d[1:3,] Date Amt 1

...for generating palettes * rgb and hsv creates palette from RGB or HSV 3-vectors. Maybe one of those will work for you. Jarek -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] Sent: Saturday, January 07, 2006 3:10 PM To: bogdan romocea Cc: r-help Subject: Re: [R] need palette of topographic colors similar to topo.colors() On Sat, 7 Jan 2006, bogdan romocea wrote: > Dear useRs, > > I got stuck trying to generate a palette of topographic colors that > would satisfy these two requirements: > - the pallete must b...

Dear useRs, I want to simulate a time series (stationary; the distribution of values is skewed to the right; quite a few ARMA absolute standardized residuals above 2 - about 8% of them). Is this the right way to do it? #-------------------------------- load("rdtb") #the time series > summary(rdtb) Min. 1st Qu. Median Mean 3rd Qu. Max. -1.11800 -0.65010 -0.09091

Dear useRs, When I use coplot() and output to png/jpeg/bmp, the grid lines from the scatter plots disappear. If I output to pdf() the grid lines are there, however I can't use it - I have many points, and the resulting PDF file is large and very slow to open and scroll through. (By the way, if I click File-Save As-png/jpeg/bmp from Rgui.exe, the grid lines are preserved - but I need to use

Dear useRs, Given this code I end up with a list of class "by": a <- sample(1:5,200,replace=TRUE) b <- sample(c("v1","v2","v3"),200,replace=TRUE) c <- sample(c(11,22,33),200,replace=TRUE) data <- runif(200) grouped <- by(data,list(a,b,c),function(x) {c(min=min(x),max=max(x), median=round(median(x),digits=2),mean=round(mean(x),digits=2))})

Dear R users, I have a few hundred .csv files which I need to put together (full outer joins on a common variable) to do a factor analysis. Each file may contain anywhere from a few hundred to a few thousand rows. What would be the most efficient way to do this in R? Please include some sample code if applicable. Thank you, b.

Dear useRs, I have a few hundred plots that I'd like to export to one document. pdf() isn't an option, because the file created is prohibitively huge (due to scatter plots with many points). So I have to use png() instead, but then I end up with a lot of files (would prefer just one). 1. Is there a way to have pdf() embed images, instead of vector instructions? (What would have to be

I am trying to import data from a SAS XPORT file that contains 24 SAS files. When I use the "read.xport" procedure only about 16 data frames (components) are created. Any suggestions? ************************************************************************* Gary A. Nelson, Ph.D Massachusetts Division of Marine Fisheries 30 Emerson Avenue Gloucester, MA 01930 Phone: (978)