similar to: some help to improve "hist to plot relative frequencies"

Dear Researches, sorry for the easy and common question. I am trying to justify the idea of RandomForest don't require a transformations (e.g. logarithmic) of variables, comparing this non parametrics method with e.g. the linear regressions. In leteruature to study my phenomena i need to apply a logarithmic trasformation to describe my model, but i found RF don't required this approach.

Dear Researchers, I have several files as this example: Myfile_MyArea1_sample1.txt i wish to split in "Myfile", "MyArea1", "sample1", and "txt", becasue i need to use "sample1" label. I try to use "strsplit" but I am able just to split as "Myfile_MyArea1_sample1" and "txt" OR "Myfile", "MyArea1",

Dear Reasearchers, I am writing a report and i need (and wish) cite R. somebody know the citation of R for the 2012? or the more actual? thanks in advance Gianni [[alternative HTML version deleted]]

Dear Members list, I am writing a paper for a research where i used "the R Stats package". No one knows the right reference for this package? Thanks in Advance Gianni [[alternative HTML version deleted]]

Dear researchers I wish to plot a box plot without the mean line (the black line) and the i wish a full line for the standard deviation This is an example mytest <- c(2.1,2.6,2.7,3.2,4.1,4.3,5.2,5.1,4.8,1.8,1.4,2.5,2.7,3.1,2.6,2.8) boxplot(mytest) really thanks Gianni [[alternative HTML version deleted]]

Dear Researches, I am using RF (in regression way) for analize several metrics extract from image. I am tuning RF setting a loop using different range of mtry, tree and nodesize using the lower value of MSE-OOB mtry from 1 to 5 nodesize from1 to 10 tree from 1 to 500 using this paper as refery Palmer, D. S., O'Boyle, N. M., Glen, R. C., & Mitchell, J. B. O. (2007). Random Forest Models

Dear Researchers, I am looking a way to disable the Error massage in read.table() as warn = TRUE in readLines(), when the lines are empty Error in read.table(con, header = F, sep = " ", nrow = n) : no lines available in input thanks for all suggestions Gianni [[alternative HTML version deleted]]

Dear Researchers, sorry for the easy question but Is it possible to plot with an interval of 1 or .5 in a plot using ylim? Thanks gianni x = 0:10; y = 0:10; plot(x~y,ylim=c(0,10),las=1) [[alternative HTML version deleted]]

dear Researchers, i am looking for a function to plot a barplot for each mean value and the related standard deviation, and i can close my week. This is an example of my data set. really Thanks in advance for any help or suggestions Gianni My.mean <- data.frame(Mean=c(0.4108926,0.3949009,0.4520346, 0.4091665,0.4664066,0.3048296,0.4297226,0.4056383,

Dear Researchers, I have a data.frame with 2 columns like this: mydf <- data.frame(value=c(1,2,3,4,5),ID=c("Area_1","Area_2","Area_3","Area_4","Area_5")) > mydf value ID 1 1 Area_1 2 2 Area_2 3 3 Area_3 4 4 Area_4 5 5 Area_5 I need to convert the *ID *in the following version > mydf value ID newID

Dear Researchers, I have a large TXT (X,Y,MyValue) file in a directory and I wish to import row by row the txt in a loop to save only the data they are inside a buffer (using inside.owin of spatstat) and delete the rest. The first step before to create a loop row-by-row is to know how many rows there are in the txt file without load in R to save memory problem. some people know the specific

Dear Researchers, someone know the right syntax to chose a 5% significance level (threshold) for the inclusion of the model variables in a multiple (linear) regression in backward way? I set the formula in this way, but I don't know to choose the 5% significance? lmodelV <- step(lm(formula=MyFormula[[1]],data=LR.train),direction="backward") thanks in advance gianni

Dear researchers I wish to plot a box plot without the mean line (the black line) and plot only the mean (red square). Futhermore, is it possible to add standard error and/or stadard deviation? This is an example mytest <- c(2.1,2.6,2.7,3.2,4.1,4.3,5.2,5.1,4.8,1.8,1.4,2.5,2.7,3.1,2.6,2.8) boxplot(mytest,lty = "solid") means <- mean(mytest,na.rm=TRUE) points(means, pch = 22, col

dear reserachers, I am looking for a expression about a special symbol (±) in a Legend and add on front of "Mean ± SD" the symbol of bracket sorry if the example is not great disptest <- matrix(rnorm(10),nrow=10) disptest.means<- rowMeans(disptest) plot(1:10,disptest.means) dispersion(1:10,disptest.means,(disptest.means+disptest ),(disptest.means-disptest

Dear Researchers, I need to convert the following equation in R from Matlab a = [x y ones(size(x))]; b = [-(x.^2+y.^2)]; a\b ans = -9.9981 -16.4966 -7.6646 my solution in R is: a = cbind(x,y,rep(1,length(x))) b = cbind(-(x^2+y^2)) > head(a) x y [1,] 14.45319 5.065726 1 [2,] 14.99478 5.173893 1 [3,] 14.64158 5.616916 1 [4,] 14.61803 6.624069 1 [5,] 14.19997

Dear Member list, is there a weblink or a paper where the total number of citations for R project is report? Thanks in advance Gianni [[alternative HTML version deleted]]

Dear Researchers, sorry for this simple question. I have a point plot with mean values and i wish to plot line with Standard Deviation as "Whiskers". I calculate the mean+sd and mean-sd, but i can not figure out the way to add the line. mydata <- data.frame(mean=c(0.42,0.41,0.41,0.43,0.45,0.43,0.43,0.42,0.44,0.45,0.45,0.45,0.46,0.43,0.42,0.37,0.44,0.46,0.46,0.39,0.40),

Fix a xl/libxl segfault when assigning a device to the guest (bug http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1713). Signed-off-by: Gianni Tedesco <gianni.tedesco@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> diff -r b05892ff0fce tools/libxl/libxl_pci.c --- a/tools/libxl/libxl_pci.c Tue Jan 25 15:14:52 2011 +0000 +++

Hello. I have a problem with Asterisk, sometimes it hangs up an external call after 20 seconds, apparently without any reason. The call comes from a SIP server hosted from EuteliaVoIP, many peers rangs and one of them answer, the call ends itself after 20 seconds from the answer. I've tried many configuration in sip.conf, but no one solved the problem. Log from /var/log/asterisk/messages:

Hello, Your bug is obvious, each pass through the loop you read twice and write only once. The file pointer keeps moving forward... Use something like while (length(pv <- readLines(con, n=n)) > 0 ) { # note that this line changed. i <- i + 1 write.table(pv, file = paste(fileNames.temp.1, "_", i, ".txt", sep = ""), sep = "\t") } (or