Re: [R] Optimization problem with nonlinear constraint

/alabama/index.html Let me know if you run into any problems using it. Best, Ravi. -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Uli Kleinwechter Sent: Monday, July 26, 2010 10:16 AM To: r-help@r-project.org Subject: [R

[R] Optimization problem with nonlinear constraint

also found hints to donlp2 but this does not seem to be available anymore. Any hints are welcome, Uli -- Uli Kleinwechter Agricultural and Food Policy Group (420a) University of Hohenheim D-70593 Stuttgart E-mail: u.kleinwech...@uni-hohenheim.de __ R

[R] Replacing NAs with 0 for variables with the same ending

the operation being carried out for all variables *x. I tried with grep and glob2rx but did not succeed. Many thanks for any hints! Uli Kleinwechter -- Uli Kleinwechter Agricultural and Food Policy Group (420a) Faculty of Agricultural Sciences University of Hohenheim D-70593 Stuttgart Phone

Re: [R] Replacing NAs with 0 for variables with the same ending

Jim Lemon schrieb: On 01/15/2010 07:10 PM, Uli Kleinwechter wrote: Dear all, I'm looking for a way to replace NA's with 0 for a number of variables which share the same ending and which constitute a subset of a data frame. Say, for example, there is data- data.frame(ax=c(1,2,3,NA,0) , bx

Re: [R] Replacing NAs with 0 for variables with the same ending

That's it, thanks a lot to all of you! Uli Henrique Dallazuanna schrieb: In grep use: grep(x$, names(data)). '$' matchs 'x' in the end of string On Fri, Jan 15, 2010 at 11:14 AM, Uli Kleinwechter u.kleinwech...@uni-hohenheim.de wrote: Jim Lemon schrieb: On 01/15/2010 07:10 PM

Re: [R] Best R text editors?

Asunto: Re: [R] Best R text editors? A: ess-h...@stat.math.ethz.ch, Liviu Andronic landronim...@gmail.com Cc: Uli Kleinwechter ulikleinwech...@yahoo.com.mx, r-help@r-project.org Fecha: lunes 31 de agosto de 2009, 4:20 LA == Liviu Andronic landronim...@gmail.com      on Sun, 30 Aug 2009 11:59

Re: [R] Best R text editors?

Hi Jonathan, contributing to your poll: Also Emacs+ESS on Linux. Uli __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented,

Re: [R] Heckman Selection Model/Inverse Mills Ratio

Dear Saurav, If you don't wish to calculate it by hand, you can extract the Inverse Mill's Ratio using the function invMillsRatio from the sampleSelection package. (http://cran.r-project.org/web/packages/sampleSelection/index.html). You can also use the heckit function in the same package

[R] Extracting coefficients' standard errors from linear model

can't find out the corresponding function. Thank you very much for your help. Uli -- Uli Kleinwechter Department of Agricultural Economics and Social Sciences Faculty of Agriculture and Horticulture Humboldt University of Berlin Unter den Linden 6 D-10099 Berlin, Germany Phone: (+49) 30 2093

Re: [R] Error when producing multiple graphes

() detach(agr1) Uli Kleinwechter wrote: Dear all, Within a larger script I use the following code to produce barplots for all variables contained in a dataframe type3m: for(xn in names(type3m)) barplot(table(type3m[[xn]]), main = paste (Barplot of, xn), width=0.75,legend.text

Re: [R] Error when producing multiple graphes

,legend.text=barnamesm, xlim=c(0,4),ylim=c(0,400)) Thanks again! Uli bartjoosen schrieb: Could you provide us some working codo, so that we can reproduce the error and see what went wrong? Uli Kleinwechter wrote: Dear all, Within a larger script I use the following code

Re: [R] Error when producing multiple graphes

I just solved the problem. The error happened because of the empty variables in the dataframe. In any case, thanks for caring. bartjoosen schrieb: Could you provide us some working codo, so that we can reproduce the error and see what went wrong? Uli Kleinwechter wrote: Dear all

[R] Error when producing multiple graphes

Dear all, Within a larger script I use the following code to produce barplots for all variables contained in a dataframe type3m: for(xn in names(type3m)) barplot(table(type3m[[xn]]), main = paste (Barplot of, xn), width=0.75,legend.text=barnamesm, xlim=c(0,4),ylim=c(0,400)) The

[R] Creating plots for all variables in a data frame and printing them with the variable name in the main title

Dear all, I'm just trying to create plots for all variables in a dataframe (named x) using the following: png() apply(x,2,hist) Just as intended, it produces one plot for each variable. Unfortunately, the main title of each graph is Histogram of newX[,i] instead of Histogram of name of

[R] How to let R repeat computations over a number of variables

Hello, I have written a small script to read a dataset, compute some basic descriptives and write them to a file (see below). The variable maizeseedcash of which the statistics are calculated is contained in the data frame agr_inputs. My question is whether there is a way to make R compute