r-lang

1. Gam calculations on groups of data and modeling on an xyplot

Hi there, I am hoping someone will be able to help me with a problem I have been having. I haven’t used R much so I am sorry if it is really obvious. I have a dataset that contains population values for certain years. In the dataset there are different ID groups with a number of years...
2. A

maximum logistic function

how can maximum the \sum\limits_{j=1}^{J}{\sum\limits_{t=1}^{T}{h_{jt}(x_t;\theta)\dfrac{e^{\alpha_j+X\beta}}{\sum\limits_{l=1}^{L}{e^{\alpha_l+X\beta}}}}} where h_{jt} is known and\alpha and \beta=(\beta_1,\ldots,\beta_s) are parameter and must be estimate.
3. Scatter graph formatting help in R

Hello all, I'm currently doing a project which I'm trying to use R with to get more familiar with it. I've run into a problem with scatter graphs. The one below, for example, shows the area of occurrence/occupancy of individual species within a genus of marine organism plotted against the...

Hi, I've been spending quite some time to figure out how I can get the best R squared value from randomization of some values in a linear regression equation. I have allele frequency data and 14 environmental gradient data. Allele frequency value is fixed, but 2~14 combinations of the 14...
5. A

install packages from local tar.gz file in linux

Hi, how I can install package from local tar.gz file??? please give me a sample tnx...
6. (Easy) question about 'apply' on arrays

Hello everyone! So... I am trying to learn how to correctly use the 'apply' function while learning something about the Wishart distribution. R has a function called 'rWishart' where you can sample random positive-definite matrices and store them in lists. From the official documentation I...
7. Repeated Measures Non-Parametric nparLD Pacakge

Hi, I'm trying to analyze repeated measurements of body temperature data collected from 7 randomly chosen subjects (e.g. turtles). I am using R, along with the nparLD package. I am using Nonparametric Tests for my LD-F2 Design (http://www.inside-r.org/packages/cran/nparLD/docs/ld.f2) because...
8. Splitting a matrix

Hi, I have a matrix x with 97 rows and used the function sample like this : rownumbers=sample(1:97,size=70) data1=x[rownumbers,] I'm having trouble to get the rows which are not inside data1 into another matrix. Does anyone have an idea? greets, Taibo
9. Markov Decision Process package?

Hello all: I posted a similar question in the SAS forum (asking if SAS had the capabilities of doing some type of Markov Decision Process). Since I am not convinced that it does (there is a PROC MCMC but I do not think it is technically for the Markov Decision Process, just the Markov Chain)...
10. Power of t-test

Hello all, I want to write an R procedure that calculates the power of a simple two samples t-test. Does anyone here has an idea how to do it ? Thank you !
11. Split string

Is there any way of splitting AnonEtAl2013 into Anon Et Al 2013 All attempts have failed so far
12. Add dotcharts next to boxplots

I've got all the box plots: boxplot( Daten$Gewicht~interaction(Daten$Dosis,Daten$Geschlecht, drop=TRUE), ylab="relative Nierengewichte", xlab="Dosisgruppen der beiden Geschlechter") and the points overlapping the box plots: points( Daten$Gewicht~interaction(Daten$Dosis,Daten$Geschlecht...
13. count frequency

my dataset looks like this in the beginning: Dosis weight sex 1 0 6.62 m 2 0 6.65 m 3 0 5.78 m 4 0 5.63 m 5 0 6.05 m 6 0 6.48 m 7 0 5.50 m 8 0 5.37...
14. Modifying X axis

Hi, I'm pretty new to R, and I have a question about plots. I've made a histogram about my data, but because i have very few data above 5, i grouped them all in '>5'. So I want my X axis like: 0 1 2 3 4 5 >5. Now I've got: 0 1 2 3 4 5 6 and >5 is written 'under' the 6. This is the code...
15. Function Lines (error when used with fitted values of a truncated regression model)

Hi everyone, I'm having some trouble with the function lines() in R. Here is an example of the code: <code> x=rnorm(100) y=10+2*x+pmax(x-0.5,0)+pmax(x-0.7,0) model=lm(y~x+pmax(x-0.5,0)+pmax(x-0.7,0)) plot(x,model$fitted.values) lines(x,model$fitted.values) </code> I want the function lines...
16. installing rpud got unrecognized option '-Wl'

I am trying to install the package rpud on a CENTOS Linux server and got the following error: /usr/local/cuda/bin/nvcc -shared -Xlinker " -Wl,-rpath,/usr/local/cuda/lib64" -L/usr/local/cuda/lib64 -lcublas -lcuda rpud.o rpudist.o -o rpud.so /usr/bin/ld: unrecognized option '-Wl' /usr/bin/ld...
17. quick way to repeat code?

Hi All! This is my first post on this website (have been reading it for months though) so please bear with me if I don't do things right :) The question I need to answer is how many rolls of a dice (in this case with 10 sides) it takes before I have seen every side. From that I need to say...
18. R unable to access internet to install packages

I am having some trouble trying to install a number of packages in R on my work computer. An example of the code I am using is as follows: install.packages("ggplot2",dependencies=TRUE) An example of the error messages I am getting is: Warning: unable to access index for repository...