similar to: How can I use R-function in My C++ project ?

As the author of 3 of the 5 methods in optim, I think you may be wasting your time if this is for performance. My reasons are given in http://www.jstatsoft.org/v60/i02 Note that most of the speed benefits of compilation are found in the objective and gradient function, with generally more minor improvements in the method. JN On 14-10-22 06:00 AM, r-devel-request at r-project.org wrote: >

1.download ruby-one click for windows from www.ruby-lang.org? set up. 2.run command: gem install rails --include-dependencies (success) 3.set up mongrel: gem install win32-service(pick the most recent one) gem install mongrel (pick the win32 pre-built) gem install mongrel_service all of the above were successful. then i creat an empty folder "d:\myapp",run the command:

Dear Users, I have a monthly data for a number of years(1960-2007) for a number of stations and i wish to extract sesonal time-series for the months of March-May and October-November for very station. I have read this data with read.table in R with stations as columns and time (months) as rows. My attempt to aggregate with the zoo package using the function as.yearqtr failed since this sums

Hi Users, I have daily series of data from 1962 - 2000, with the data for February 29th in leap years excluded, leaving 365 daily values for each year. I wish to convert the daily series to monthly series. How can I do this using the zoo package or any other package? Thanks ZABLONE OWITI GRADUATE STUDENT Nanjing University of Information, Science and Technology College of International

FYI they organize this kind of stuff throughout the years in different cities. Not sure about Nanjing but I did see one in Shanghai Zhang > 在 2018年7月20日，10:40，Shi, Steven via llvm-dev <llvm-dev at lists.llvm.org> 写道： > > Is there similar social party in other Chinese cities? Like Shanghai, Nanjing? > > Thanks > Steven Shi > >> -----Original Message-----

Dear users, I have monthly station data (44) stations data for 45 years which I have read in R using read.table. the data is in the format: Year Month Station1 Station2 ...................................... Station 44 (i.e the column names in the 1st row), I also have the latitude and longitude of the stations in a separate file in R (in the format : Station LAT LON). I wish to

Dear all, I hope to remove a whole column from a data frame or matrix (> 2000 columns). All value in the column are same. The first thing is to select those columns. For instance, I hope to remove the V3~6 column, for all the value in those colume is zero. V3 V4 V5 V6 V7 V8 V9 V10 1 0 0 0 0 0.000 0.000 0.000 0.000 2 0 0 0 0 0.000 0.000 0.000 0.000 3 0 0 0

Dear all, In one S+ program, I found the following code. if (impres) cat("blah blah blah \n") Would someone here like to tell me what's the counterpart in R to impres in S+? Thanks in advance! Best wishes, Jinsong ===== (Mr.) Jinsong Zhao Ph.D. Candidate School of the Environment Nanjing University 22 Hankou Road, Nanjing 210093 P.R. China E-mail: jinsong_zh at yahoo.com

Hi R users, What is the command for adding (or how do we add) country boundaries on r-spatial plots. Thanks ZABLONE OWITI GRADUATE STUDENT Nanjing University of Information, Science and Technology College of International Education Add: 219 Ning Liu Rd, Nanjing, Jiangsu, 21004, P.R. China Website: www.nuist.edu.cn ==================================================== [[alternative

Dear users, I have several columns of data (each column containing monthly data for a particular year from january - december) . I would wish to combine the columns to get a Single column of continuous data as shown in (b) below. I have read this data as table in R (a) Data example Year 1903 1904 1905 1906 Jan 125.0 30.0 113.0 5.0 Feb 128.0 100.0 70.0 388.0

Hello, Is it possible to use R functions (in my case: ks.test()) from C++ -applications? That is, I get the impression R can execute C/C++ code, but is there any possibility to do the opposite? Where can I find help? ------------------------------------------- Ph. D. J??rgen Wallerman Swedish University of Agricultural Sciences Remote Sensing Laboratory S901 83 UME??

Dear Manager: Thanks in advance for your interest, We mainly produces are Indole series (indole, 3,3'-Methylenebisindole , 5-methoxy indole) Indole >99% POWDER loss on drying: 1% white slight yellow crystalline powder CRYSTAL melting point: 51-53 loss on drying: 0.5% white sheetform crystal

Dear all, I would like to know how can I create a binned column in a data.frame. The output that I would like is something like this: Start Binned_Start 1 0-5 2 0-5 6 5-10 8 5-10 13 10-15 ... Best regards João Fadista Ph.d. student UNIVERSITY OF AARHUS Faculty of Agricultural Sciences Dept. of Genetics and Biotechnology Blichers

Dear all, I would like to know how can I concatenate 2 data.frames into a single one. Both data frames have the same number of columns and the same class type in each correspondent column. So what I want is to have a new data.frame where I have first the values from one data.frame and then the values from a second data.frame would came after in this new data.frame. Thanks in advance. Med

Dear all, I would like to know how can I retrieve a data.frame without the columns that have a partial match name. Let´s say that I have a data.frame with 200 columns and 100 of them have the name "StartX", with X being the unique part for each column name. I want to delete all columns that have the name starting with "Start". I´ve tried to do this but it doesn´t work: >

Dear R users, I have a question about R installation under Cygwin. Which versionof R should I download ,linux or windows? If linux ,which release should I download? Thanks a lot! Jiansheng Wu PhD Candidate of State Key Laboratory of Bioelectronics Southeast University, Nanjing, 210096, China Tel 86-25-83790881 Email: js_wu@seu.edu.cn [[alternative HTML version deleted]]

Hi,all! I encountered a problem "not-yet-implemented method for <list> %*% <dgCMatrix>" when I tried "diagr %*% design_mat", where "diagr<-diag(vr,100)", vr is a vector with 100 elements, and design_mat is a sparse matrix with dimension 100*677000 constructed by calling sparseMatrix(). I am new to the Matrix package, so I am confused with this, and I

Hi, I was wondering: I've got a dataset where I've got student 'project's nested within 'school's, and 'division' (elementary, junior, or senior) at the student project level. (Division is at the student level and not nested within schools because some students are registered as juniors & others as seniors within the same school.) So schools are random,

Dear all, Can I do a permutation test if the number of individuals in one group is much bigger than in the other group? I searched the literature but I didin´t find any assumption that refers to this subject for permutation tests. Best regards João Fadista Ph.d. student UNIVERSITY OF AARHUS Faculty of Agricultural Sciences Dept. of Genetics and Biotechnology Blichers Allé 20, P.O.

Dear all, I'm looking for a way to solve a simple optimization problem with a nonlinear constraint. An example would be max x s.t. y = x * T ^(x-1) where y and T are known values. optim() and constrOptim() do only allow for box or linear constraints, so I did not succedd here. I also found hints to donlp2 but this does not seem to be available anymore. Any hints are welcome,