similar to: Differential Equations

Hello! I'm not sure if is it a BUG or not... I'm using R 1.9.0, and I used the command below: > is.integer(9) [1] FALSE R manual contains this words about the is.integer() function: "is.integer returns TRUE or FALSE depending on whether its argument is of integer type or not." What's the problem? Am I wrong about the BUG report? Thank you very much. M?rcio de

Hello! I'm trying to get an array of bytes from graphic images generated by R. Here, you can see my Java code: -------------------------------------------------------------------------------------------------------------------------- Process p = Runtime.getRuntime().exec("C:/Arquivos de programas/R/rw1090/bin/Rterm.exe --no-save"); DataOutputStream output = new

Hello to all, I am try to build a package, I do the follow commands: "R CMD check pack", "R CMD pack build" and run OK, no errors. I put my shared library in package subdirectory R, src, but it is not put a shared library ".so" in directory "/usr/lib/R/library/pack/lib". Below is my code : dyn.load("pack.so",PACKAGE="pack") argc<-2

Hi all, I have a C code in Linux, it has 7 pointers and compile e run OK, but when I run in R happens problems with calloc function, it returns NULL. ############################################### > int *temp1,*temp2,*temp3,*temp4; temp1 = (int *)calloc(col,sizeof(int)); if(temp1 == NULL){ printf("\n\n No Memory1!"); exit(1); } temp2 = (int *)calloc(col,sizeof(int));

Hi!! I want some help to install the RMySQL package. I've tried to configure some things but i'm still getting erros. Anybody could help me?? Thank's Talita Perciano Costa Leite Graduanda em Ci??ncia da Computa????o Universidade Federal de Alagoas - UFAL Departamento de Tecnologia da Informa????o - TCI Constru????o de Conhecimento por Agrupamento de Dados - CoCADa

Hi everybody, I'm studying descriptive statistics using R and I have to make an important work about that. I need some help to choose a good data set to apply those statistics. Does anybody know a good data set I could work with? Thanx, Talita Perciano Costa Leite Graduanda em Ci?ncia da Computa??o Universidade Federal de Alagoas - UFAL Departamento de Tecnologia da Informa??o - TCI

Hello everybody, I'm studying descriptive statistics with R and I want to know how to calculate the asymmetry and kurtosis coefficients of a sample using R. I'll appreciate some help. Thanx, Talita Perciano Costa Leite Graduanda em Ci?ncia da Computa??o Universidade Federal de Alagoas - UFAL Departamento de Tecnologia da Informa??o - TCI Constru??o de Conhecimento por Agrupamento de

Hi everybody, I have the source of a C program that includes some archives .c and some libraries .h. I'm developing a program using R and I want it to load the C program I told before. How can I do that? I was looking for some function in R to do that and I found the .C() but I can't understand how it works. Somebody could help me? Thanx, Talita Perciano Costa Leite Graduanda em

Hi all, I need to plot a dendrogram, but I built a hclust object. Follow the code lines: >dendObject<-list(merge=merge,height=height,order=order,labels=labels,call="hclust(d=d)",method="complete", dist.method="euclidean") >class(dendObject)<-"hclust" >plclust(dendObject,axes=FALSE) Error in cl[[2]] : subscript out of bounds Anybody can help

Hello to all, I don't know almost nothing about Tcl/TK. I have the follow code: >Name <- tclVar("") >insert.Name <-tkentry(window1,width="20",objectvariable=Name) >tkplace(tklabel(window1,text=" Enter the matrix name:"),x=0,y=0) >tkplace(insert.Name,x=175,y=0) So, I need to pass the variable Name like parameter in R function. Ex:

Hi all, I has a C code in Linux, it has 7 pointers and compile e run OK, but when I run in R happens Segmetation Fault. When I use calloc function, it returns NULL. What's wrong? I would like more information about R-alloc function? Thanks! -- Marcelo Damasceno de Melo Graduando em Ciência da Computação Departamento de Tecnologia da Informação - TCI Universidade Federal de Alagoas - UFAL

Hi! I want to know if there is a function in R that makes integration using numerical methods. Thank's for helping! Talita Perciano Costa Leite Graduanda em Ci??ncia da Computa????o Universidade Federal de Alagoas - UFAL Departamento de Tecnologia da Informa????o - TCI Constru????o de Conhecimento por Agrupamento de Dados - CoCADa

Hi everybody! I'm trying to plot a parametric curve (three dimensions) using R but I didn't obtain good results. Somebody have already done something like that? Please help me! Talita Perciano Costa Leite Graduanda em Ci??ncia da Computa????o Universidade Federal de Alagoas - UFAL Departamento de Tecnologia da Informa????o - TCI Constru????o de Conhecimento por Agrupamento de Dados -

Hi everybody, I'm making an application using the package tcltk. Everything goes fine until I load the package RGtk. The interface doesn't work anymore. Is there any conflict between these packages? I thought about unloading the package RGtk but I don't know how to do that. Thanks, -- Talita Perciano Costa Leite Graduanda em Ci??ncia da Computa????o Universidade Federal de Alagoas

Hello, Does anybody know how can i call a R function in a tcltk file? I made a tcltk file, but I need call functions in R. i.e: in R I can put .Tcl("tcltk statement"). There are a same command to call R in a tcltk file? I want to make a R Gui using tcltk language, do you recommend use a tcltk or a R pack tcltk and don't use tcltk language? Thanks for your attention.

Hello I'm with a doubt using BIC and AIC. I want to know if both of then are a way to steem the best model to use. How i know which of then to choose? Talita Perciano Costa Leite Graduanda em Ci??ncia da Computa????o Universidade Federal de Alagoas - UFAL Departamento de Tecnologia da Informa????o - TCI Constru????o de Conhecimento por Agrupamento de Dados - CoCADa

Dear all, I have two questions: 1. Does anyone know if nlmeODE package will work once odesolve is discontinued? If i understand well nlmeODE depends on odesolve. 2. Can anyone suggest another package I could use to fit complex PKPD models (described using differential equations) to data? Thanks a lot! Magdalena

Hi, I was trying to run the example of Indomethacin kinetics from the book: ## From Pinheiro/Bates, Mixed-Effects-Models in S and S-Plus, ## Springer, Second Printing 2001, Section 6.2 library(nlme) plot(Indometh) fm1Indom.nls <- nls(conc~SSbiexp(time,A1,lrc1,A2,lrc2), data=Indometh) summary(fm1Indom.nls) plot(fm1Indom.nls,Subject~resid(.),abline=0) ## .... the last plot command gives me the

Dear all, I wonder if there is a way to specify a model in differential equations for nlme(). Or in other packages? Appreciate any comment. Thanks. Jun Shen [[alternative HTML version deleted]]

Hello list I have a theoretical differential equation model (two coupled differential equations) describing the acidification of dairy cultures in milk: dX/dt = f(H, param)*X dH/dt = g(param)*dX/dt pH = -log10(H) I also have actual data of the same. I would like to estimate the parameters of the theoretical model from real data, but don't know how to go about it in R (I'm fairly new