search for: isella

...nly one experiencing this. Cheers L. On Sun, Jul 07, 2019 at 03:16:20PM +0200, Ralf Stubner wrote: >Hi Lorenzo > >Joshua Ulrich <josh.m.ulrich at gmail.com> schrieb am So. 7. Juli 2019 um >14:16: > >> Hi Lorenzo, >> >> On Sun, Jul 7, 2019 at 6:42 AM Lorenzo Isella <lorenzo.isella at gmail.com> >> wrote: >> > ** byte-compile and prepare package for lazy loading >> > Error in dyn.load(file, DLLpath = DLLpath, ...) : >> > unable to load shared object >> '/usr/local/lib/R/site-library/curl/libs/curl.so': &gt...

Dear All, I am far from being a guru about parallel programming. Most of the time, I rely or randomForest for data mining large datasets. I would like to give a try also to the gradient boosted methods in GBM, but I have a need for parallelization. I normally rely on gbm.fit for speed reasons, and I usually call it this way gbm_model <- gbm.fit(trainRF,prices_train, offset = NULL, misc =

Dear All, Probably a one liner, but I am banging my head against the floor. Consider the following DF <- data.frame( x=1:10, y=10:1, z=rep(5,10), a=11:20 ) mn<-names(DF) but then I cannot retrieve a column by doing e.g, DF$mn[2] I tried to play with the quotes and so on, but so far with no avail. Any suggestion is welcome. Cheers Lorenzo

Dear All, I would like to be able to plot histograms/densities on a semi-log or log-log scale. I found several suggestions online http://tolstoy.newcastle.edu.au/R/help/05/09/12044.html https://stat.ethz.ch/pipermail/r-help/2002-June/022295.html http://www.harding.edu/fmccown/R/#histograms Now, consider the code snippet taken from http://www.harding.edu/fmccown/R/#histograms # Get a random

...), cex.lab=1.2 ) axis(2, mgp=c(0, 0.2, -2)) dev.off() With mgp() I can tune the distance between the ticks and the tick labels, but how can I move the axis label? I would like to move the one along y to visualize correctly the exponent "3". Kind Regards Lorenzo On 08/08/07, Lorenzo Isella <lorenzo.isella at gmail.com> wrote: > Dear All, > I am experiencing some problems with relocating an axis title. > I visited the following link before posting: > > http://tolstoy.newcastle.edu.au/R/help/05/05/5283.html > > But this is not entirely what I would like to do...

Dear All, I am struggling with the following problem: I am given a NxN symmetric matrix P ( P[i,i]=0, i=1...N and P[i,j]>0 for i!=j) which stands for the relative distances of N points. I would like use it to get the coordinates of the N points in a 2D plane. Of course, the solution is not unique (given one solution, I can translate or rotate all the points by the same amount and generate

Dear All, I am given some data to analyze. The data is in the form of a Stata database (.dta file). What is the best way to import it into an R dataframe? Is there any particular caveat I should be aware of? Many thanks Lorenzo

...e on different hardware. (4)finally, a list of the advantages for using R over commercial statistical packages. The money-saving in itself is not a reason good enough and some people are scared by the lack of professional support, though this mailing list is simply wonderful. Kind Regards Lorenzo Isella

Dear All, I would like to use a randomForest algorithm on a dataset. The set is not particularly large/difficult to handle, but it has some missing values (both factors and numerical values). According to what I found https://stat.ethz.ch/pipermail/r-help/2005-September/078880.html https://stat.ethz.ch/pipermail/r-help/2007-January/123117.html the randomForest package has a problem with missing

Dear All, I implemented an algorithm for (uniform) random rotations. In order to test it, I can apply it to a unit vector (0,0,1) in Cartesian coordinates. The result is supposed to be a set of random, uniformly distributed, points on a sphere (not the point of the algorithm, but a way to test it). This is what the points look like when I plot them, but other then eyeballing them, can anyone

Dear All, Probably something very easy, but I am looking for the most efficient ways to achieve this. Consider the following snippet y<-c('a','b','c','d','e','f','g') x<-rnorm(length(y)) df<-data.frame(y,x) leading to > df$y [1] a b c d e f g Levels: a b c d e f g Now, I would like to replace levels

I don't have my debian box available so can't confirm. But I would try $apt-get install libpng On Tue, Apr 19, 2016 at 11:23 AM, Lorenzo Isella <lorenzo.isella at gmail.com> wrote: > Dear All, > I have never had this problem before. I run debian testing on my box > and I have recently update my R environment. > Now, see what happens when I try the most trivial of all plots > > plot(seq(22)) >> > Error in (...

Dear All, I have never had this problem before. I run debian testing on my box and I have recently update my R environment. Now, see what happens when I try the most trivial of all plots > plot(seq(22)) Error in (function (display = "", width, height, pointsize, gamma, bg, : X11 module cannot be loaded In addition: Warning message: In (function (display = "", width,

Dear All, Consider a matrix (N x N) where each entry is either zero or one (can hardly get any simpler). Now, I would like to plot it as a 'chessboard' where every matrix entry is a black (1) or white (0) square. Whatever tool I use to plot it, it should not try to interpolate the data at all. I found some online references http://www.phaget4.org/R/image_matrix.html but probably I can

Hi Lorenzo, On Sun, Jul 7, 2019 at 6:42 AM Lorenzo Isella <lorenzo.isella at gmail.com> wrote: > > Dear All, > I have just upgraded to Debian stable 10 and rebuilt most of the R > packages. > I use the R backported packages from here > > https://cran.r-project.org/bin/linux/debian/#debian-buster-testing > > for the core sy...

Dear All, I am given a set of files names as: velocity1.txt velocity2.txt and so on. I am sure there must be a way to read them automatically in R. It is really taking me longer to read them than to analyze them. Anybody has a suggestion to help me out with this? Many thanks Lorenzo

...which might require some fiddling e.g. d <- function(x) { exp(-x^2/2)/(sqrt(2*pi)) } # just an example for you to test with; use your own density d(x) in your case Then define myCumDist, myQuantile as above and compare with pnorm, qnorm. HTH, Eric On Tue, Nov 7, 2017 at 4:22 PM, Lorenzo Isella <lorenzo.isella at gmail.com> wrote: > Dear All, > Apologies for not providing a reproducible example, but if I could, then I > would be able to answer myself my question. > Essentially, I am trying to fit a very complicated custom probability > distribution to some data. >...

Dear All, I am running Debian testing on my system for the amd64 architecture, When trying to install the RGtk package I get this error > install.packages('RGtk2') Installing package(s) into ?/usr/local/lib/R/site-library? (as ?lib? is unspecified) trying URL 'http://rm.mirror.garr.it/mirrors/CRAN/src/contrib/RGtk2_2.20.8.tar.gz' Content type 'application/x-gzip'

Dear All, I have just upgraded to Debian stable 10 and rebuilt most of the R packages. I use the R backported packages from here https://cran.r-project.org/bin/linux/debian/#debian-buster-testing for the core system. I encounter some issues when updating quantmod, tseries and forecast. For instance, see the following > install.packages("tseries") which finally fails with the

Dear All, I have just upgraded to Debian stable 10 and rebuilt most of the R packages. I use the R backported packages from here https://cran.r-project.org/bin/linux/debian/#debian-buster-testing for the core system. I encounter some issues when updating quantmod, tseries and forecast. For instance, see the following > install.packages("tseries") which finally fails with the