search for: agronomy

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 aattiamohamed2 at unlnotes.unl.edu Cell phone: 4023604178

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 http://www.une.edu.au/agronomy/weeds/saffron/saffron.html -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-...

...t;d:/Cic/Sweave/Figs/Sheep3/FS/14/sFSheepFS14.tex", pdf=TRUE,clean=F, texinputs = "--include-directory=d:/Cic/Sweave/Figs/Sheep3/FS/14") and other variants Any guide on how to specify the output directory would be greatly appreciated. Regards Duncan Duncan Mackay Department of Agronomy and Soil Science University of New England Armidale NSW 2351 Email: home: mackay at northnet.com.au

..."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 Mehrshad -- Mehrshad Barary Senior Lecturer in Crop Ecophysiology Department of Agronomy and Plant Breeding Faculty of Agriculture Ilam University Tel: (+98)8412227019-21 Fax: (+98)8412227015 [[alternative HTML version deleted]]

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, meanT,...

....6, 2.4, 1.2, 1.5) # in radians seed<-c(1.7, 1.3, 1.5, 1.9, 1.8, 2.3) circ.cor(wind, seed, test=T) Joseph Dauer Master's Student Weed Ecology 412 ASI Pennsylvania State University University Park, PA 16802 email: jtd152@psu.edu office phone: (814) 865 - 6679 http://www.agronomy.psu.edu/weedecology [[alternative HTML version deleted]]

...ib/gcc/powerpc-apple-darwin6.6/3.4/../../.. -lfrtbegin -lg2c -lSystem -lcc_dynamic /usr/bin/ld: -undefined: unknown argument: -lbundle1.o make: *** [dse1.so] Error 1 ERROR: compilation failed for package 'dse1' ** Removing '/Users/el/Library/RAqua/library/dse1' Emilio A. Laca Agronomy and Range Science UC Davis One Shields Ave. Davis CA 95616 (530) 754-4083

...Treatment2 panel = function(value, groups){ panel.curve(expr = x+ value*x^2, groups, from = -2, to = 2) } ) I tried my one panel function but came up with more error messages so have omitted it. Regards Duncan Duncan Mackay Department of Agronomy and Soil Science University of New England ARMIDALE NSW 2351 Email home: mackay at northnet.com.au

...border = FALSE)) ) I could get things to work when the legend was on top using http://finzi.psych.upenn.edu/R/Rhelp02/archive/46654.html on something similar but could not get it to work in the last panel of a multipanel plot. Regards Duncan Mackay Department of Agronomy and Soil Science University of New England Armidale NSW 2351 Email: home mackay at northnet.com.au R version 2.12.1 (2010-12-16) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_Australia.1252 LC_CTYPE=English_Australia.1252 LC_MONETARY=English_Australia.1252 [4] LC_NUMER...

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

Dear useRs, I'm having troubles with using ylim in barplot(): even though I reduce the y-scale using ylim, the bars still extend down to 0into the x-labels. The sample data is below, and here is the code. #This works fine but I would like to plot only from 50 to 70: barplot(t(mydata), beside=TRUE, col=c("orange", "green", "yellow", "purple"),

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) #

...conduct field work and will collaborate with model developers in Agriculture and Agri-Food Canada (AAFC) as well as other partners in ARS and within the Long Term Agroecosystems Research (LTAR) network. Qualifications include a recent Ph.D. (within the last 4 years) in Agricultural Engineering, Agronomy, Geography or a related discipline; ability to participate as a team member in the collection of field data of soil moisture, biomass, phenology and leaf area index (LAI); and knowledge of remote sensing and geospatial analysis for using radar and optical data from earth orbiting satellites. This j...

..., Italy, focusing on areas such as food security, climate change and agricultural development. The candidate will work in the Economic and Social: Statistics division (ESS) and will have the opportunity to interact with many statisticians at FAO who work on very diverse fields such as epidemiology, agronomy, household survey analysis, econometric time-series or geo-spatial analysis. For more informations or to apply, please write to Matthieu.Stigler at fao.org. If you are interested, please send your CV and, instead of a cover letter, answer briefly the questions at bottom of e-mail. Kindly also give...

...ad on this? Any other pointers on using R in mac os x will be greatly appreciated. Thank you so much for your time on this question, and for everything you put into rmac! EAL ============================================================== Emilio A. Laca One Shields Avenue, 2306 PES Building Agronomy and Range Science ealaca at ucdavis.edu University of California fax: (530) 752-4361 Davis, California 95616 (530) 754-4083

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 =