search for: agronomi

Dear All, I'm a beginner user in R and I would like to make a quadratic and plateau model in R. Can you help please with an example? Thanks so much -- Ahmed M. Attia Assistant Lecturer El-Khattara farm Station Agronomy Dept., Zgazig Univ., Egypt Visiting Scientist Haskell Agricultural laboratory Agronomy and Horticultural Dept., Univ. of Nebraska-Lincoln ahmedatia at zu.edu.eg

Hi all, Does a (free) script to do a ZIP lm exist? I'm running R1001 on Windows 97. Hope this hasn't been asked before. Cheers, Blair Blair Grace Postgraduate Agronomy & Soil Science School of Rural Science & Natural Resources University of New England Armidale NSW 2351 CRC Weed Management Systems Ph (+61)(02) 6773 3691 Fax(+61)(02) 6773 3238 Home page

Dear All I am trying to specify the output directory and the directory for the log files (the same) for texi2dvi. The default for my windows computer is C:\Users\...\Documents which I do not want. The help guide: texinputs NULL or a character vector of paths to add to the LaTeX and bibtex input search paths. is a little cryptic for me this morning I have tried texi2dvi(file =

Hi Everyone, I am using ASReml to fit a spatial model. I do not have all the components of ASReml when I call; names(summary()) e.g. names(summary(fcov.asr2)) [1] "call" "loglik" "nedf" "sigma" "varcomp" I am trying to get the coefs but I get "NULL". Does anybody know the reason? Any help would be much appreciated. Regards

Hello everyone, I am working for a few days already on a basic algorithm, very common in applied agronomy, that aims to determine the degree-days necessary for a given individual to reach a given growth stade. The algorithm (and context) is explained here: http://www.oardc.ohio-state.edu/gdd/glossary.htm , and so I implemented my function in R as follows: DD <- function(Tmin, Tmax, Tseuil,

I have a problem that deals with correlating wind velocity to seed collection data. The problem lies in that I have a wind data set that is contains 2000+ data points and weed collection data on the order of a couple hundred. Both data sets were collected for the same time period, but there is not a one-to-one wind velocity->seed location match. My understanding of correlation is that you

I would like to request help with the installation of dse in raqua in mac os x 10.3. I get the following error message after the messages indicating that parts were successfully installed. I would be most grateful for a solution. ----------------------------------------- * Installing *source* package 'setRNG' ... ** R ** inst ** help >>> Building/Updating help pages for

Hi All I have regression coefficients from an experiment and I want to plot them in lattice using panel curve but I have run into error messages. I want an 3 panel conditioned plot of 2 curves of Treatment 2 in each panel conditioned by Treatment1, the example curve expression is x+value*x^2 A rough toy example to give an idea of what I want is: Data: data = expand.grid(Treatment1 =

Dear All I have a problem with the height of the boxes in the key in the following. (The text is over 2 lines to accentuate the problem of no space between the rectangles.) Is there an easy way to put a space between the rectangles; size controls the width but there appears to be nothing for the height? xyplot(1~1, key = list(corner = c(0.8,0.8),

Dear all, When defining explicit keys with xyplot, I have previously used the fill parameter to set the background colour of point symbols. That's no longer working for me, and I am wondering whether it's a bug or whether I've misinterpreted the documentation and have been relying on a feature wasn't intended. If the latter, can anyone suggest the correct way to do it?

Dear all, I would like to have the same color for the all boxplots from the same panel, but my code below shows the two colors alternating. Thanks! set.seed(42) D1 <- rnorm(200) D2 <- factor(sample(letters[1:2],200,TRUE)) D3 <- factor(sample(letters[3:5],200,TRUE)) DF <- data.frame(x=D1,a=D2,b=D3) print(bwplot(b~x|a,data=DF,col=c("black","black"),

Hi! When inserting R plots into a document using odfWeave, I fought for a while to get Lattice plots use the same text size as base plots. I eventually discovered that specifying a point size via e.g. svg(pointsize=10) has no effect on Lattice plots. One needs to adjust the size manually via: trellis.par.set(fontsize=list(text=10, points=8)) This is also developed for both Lattice and ggplot2 by

..."TG10", "TG11", "TG12"), c("L.mean", "L.mean_T1", "L.mean_T2", "L.mean_T3"))) -- St?phanie Eyssautier Ing?nieure d'?tudes Universit? de REIMS CHAMPAGNE-ARDENNE Laboratoire GEGENA2 Centre de Recherches en Environnement et Agronomie 2, Esplanade Roland Garros 51100 REIMS T?l: 03 26 77 36 36 Fax: 03 26 77 36 94

I would like to use lattice graphics to plot multiple functions (or groups or subpopulations) on the same plot region, using different line types "lty" or colors "col" to distinguish the functions (or groups). In traditional graphics, this seems straightforward: First plot all the data using 'type="n"', and subsequently execute a series of "points"

Hi all I am preparing a document using Sweave; a really useful tool. But I am having a problem. Consider this toy example Sweave file: \documentclass{article} \begin{document} <<echo=TRUE,results=verbatim>>= options(width=40) # Set width to 40 characters hide <- capture.output(example(glm)) # Create an example of the problem, but hide the output summary(glm.D93) #

The USDA-Agricultural Research Service, Southeast Watershed Research Unit in Tifton, GA, is seeking a postdoctoral research associate for a full-time, 2 year appointment. The research associate will develop, calibrate, and validate a semi-empirical model for estimating cotton biomass from fields within the southeastern United States. Model development will involve the use of optical and radar

Hi Our organisation, Food and Agricultural Organization of the United Nations (FAO) has launched a small pilot project to encourage the use of R within FAO. In this regard, we are looking for a motivated person with strong skills in R, able to teach R to beginners, and to develop specific packages on request. More specifically, the candidate will be given the challenge to build staff's

I need to install some geostatistics packages that are not in the binaries, for example gstat. I downloaded rm171 and installed, and I even added precomplied packages successfully. Unfortunately, I do not know how to add packages available as gstat. If you can spare a minute, could you give me a lead on this? Any other pointers on using R in mac os x will be greatly appreciated. Thank you so much

Hello, I am trying to convert the following command from SPLUS to R: graphsheet(pages = TRUE) Does anyone have an idea what is the equivalent in R? Thanks -- View this message in context: http://www.nabble.com/graphsheet-tp19026010p19026010.html Sent from the R help mailing list archive at Nabble.com.

Hi everyone, I would like to improve my plot and I was wondering if someone can help me whith it. I'm trying this plot using two groups, but I want to choice the colors (the black and white circles) but I don't know how to change it from here. These are my sentences: myplot3d<- scatterplot3d(myfile$Temperature, acantarcthus$Salinity,myfile$Abundance, type="h",    color =