search for: d'alfort

Dear R users, I would like to calculate a cumulative sum as following: on the i-th row, in the j-th column of a matrix, I would like to obtain the sum of the (i-1) preceding elements of this j-th column. Could I avoid a "for" loop? Thank you, Tristan Lorino ---------------------- ?cole...

Hi, About GUI and R, I would say that personnaly, I need to build a nice GUI for people who does not know anything about R, to conduct simulations. I don't know if the choice of R is the best. Maybe writing all the code in Java would be better... I don't know. That's why I have tried to install RSJava fr...

Hi, I would create a function rdiscrete that returns the value of a discrete random variable X defined on a subset which can change, and for the same probability for the issue, eg: X could sometimes take a value in the subset {2,3,4} with probability 1/3 for each issue, and sometimes X could take a value in th...

Hello, Instead of receiving only one message when somebody send a question or a answer, I receive 2 messages with exactly the same contents inside. Is it the same for you? Thank you, Fanny -------------------------- Fanny AZIZA École Nationale Vétérinaire d'Alfort Mail: faziza@vet-alfort.fr Tél. 01 43 9...

Dear all, I am looking at habituation of dogs trotting on a treadmill. I record the ground reaction force and I analyze it with several discrete variables (maximum, minimum,...) For each variable, I get between 40 and 50 data per sample. I record data at time 1 min, 2 min, and 4 min a day, and I...

Dear all, I try to compare the performances of several parameters to diagnose lameness in dogs. I have several ROC curves from the same dataset. I plotted the ROC curves and calculated AUC with the ROCR package. I would like to compare the AUC. I used the following program I found on R-help archiv...

I might be missing something but I thought that AUC was a measure for comparing ROC curves, so there is nothing else needed to "compare" them. The larger AUC is the higher correlation of 2 variables compared. No other measures or calculations are needed. Jarek Tuszynski -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Laurent Fan...

Dear R-gurus, I have an interpretation problem regarding lme models. I am currently working on dog locomotion, particularly on some variation factors. I try to figure out which limb out of 2 generated more dispersed data. I record a value called Peak, around 20 times for each limb with a record....

Dear R users, Is it possible to install RMySQL package with R 1.5.0 on Windows 2000 platform? This package is not listed in the packages list after calling "load package from CRAN" menu... Thank you for your help, Tristan Lorino ---------------------- ?cole Nationale V?t?rinaire d'A...

Dear R users, I would like to express a function (with only one argument) as the integrate of its derivate. For example, for y=x^2, I would like something like integrate(deriv(~x^2,"x", function(x) NULL, formal=T),0,2) which would give me... 4. Thank you, Tristan ----------------------...

Dear R users, I was happy to find a binary library for SJava in the last released of R (1.5.1)... I am able to load the library... but I have some problems to run this library: > .JavaInit() Error in .JavaInit() : Couldn't start Java Virtual Machine: Can't create Java Virtual Machine &gt...

Dears users, Thanks for your responses concerning my question of yesterday (about stand-alone package). Il would like to explore two ways: -- Tcltk extension, -- Rweb application. I have installed ActiveTcl (in F:\Tcl), and I have modified the PATH (in the autoexec.bat file): set R_LIBS=F:\R\rw105...

> Dears users, > I'm trying to run R on a computer with OS X. I installed the R folder > and the dylibs, where they must be installed. I updated my path, and > R runs but tells me : > > dyld: /usr/local/R-1.4.0/lib/R/bin/R.bin version mismatch for > library: /usr/lib/libz.1.d...

Dear R users, I'm working with Windows 2000 and R -- note that I could maybe work with Linux too... I would like to know if it is possible to build a stand-alone statistical package which: -- could be programmed in R language, -- could have a nice graphical interface with buttons and menus (this...