similar to: Re: normal distribution in samples of soil organisms.

Hi Sirs and Madams. My question is more statistical than related with the use of R software and I hope it will not seems so silly and elemental. I'm analyzing a set of data of some soil organism collected in diferent landscapes, soils taxa, and depths. The sample was performed thinking in a factorial structure with four factors: Specie, Landscape, Soil and Depth. Because not all the

Dear all, I have several sets of x-y-z points and I need to estimate the volume that encompass all my points. Recently I got some adivice to show the "convex hull" of my points using geometry package (see code below). But now I need to calculate the volume of my set of points. Any advice are wellcome. Thanks in advance Miltinho Astronauta Brazil ----- require(geometry) library(rgl)

Hi All, I would like to use Kennard-Stone algorithm for splitting a dataset. > mydata <- read.csv(url("http://www.ats.ucla.edu/stat/r/dae/binary.csv ")) > library("soil.spec") > ken.sto(mydata,per.n=0.3) Error in ken.sto(mydata, per.n = 0.3) : subscript out of bounds I found that other people run into this problem as well:

Hi, I am trying to create a triangular plot to show the 'composition' of a set of items with three variables (historically the percent sand, silt and clay in soil). So far I have tried the 'soil texture triangle plot' in the package plotrix and the 'ternary or triangular plots' in the package cwhtool (cwhmisc). Both have strengths and weaknesses, but neither has a

http://r.789695.n4.nabble.com/file/n3031344/RSV.Rdata RSV.Rdata I want to split my dataset to training set and test set using kennard-stone(KS) algorithm, it is lucky there is R packages soil.spec to implement it. but when I used it to my dataset, it does not work, who can help me, how reasons is it, below, it is my code, and my data in the attachment.

Dear R users, has anybody made an attempt to create the soil texture triangle graph in R? For an example see here: http://www.teachingkate.org/images/soiltria.gif I would like to get the lines in black and texture labels in gray to allow for plotting my texture results on top. Any examples or suggestions are very welcome! Thanks in advance, Sander. --

Hello, Using the dataset below I produce a soil.texture plot (R code for this included at the end). One will notice I have plotted the points based on whether or not they are in a region called 'upstream' or 'downstream'. I'm curious if there is a way to somehow extract counts of the number of points (red points and blue points) falling within each classification (e.g. silty

Hi people, I have made some progress trying to work out how to solve this problem but I have got a bit stuck - sorry if this turns out to be a simple exercise . . Allelic Differentiation (AD) in genetics measures the number of different alleles between (say) two populations eg: Organisms in Pop 1 have alleles: a, b, c, d, e Organisms in Pop 2 have alleles: b, b, c, d, e Different

Hi, I wonder if you could help me with my barcharts, I am using the barchart function from the lattice library. I have data like this: Complex,Organisms,Percentage 130,0,50 130,1,10 130,2,20 130,3,15 130,4,5 133,0,10 133,1,15 133,2,20 133,3,50 133,4,5 I draw barcharts using this command...

Hello, i'm trying to convert my physical web servers to a virtual guest. What i'm experiencing is a poor disk i/o, compared to the physical counterpart (having strace telling me that each write takes approximately 100 times the time needed on physical). Tested hardware is pretty good (HP Proliant 360p Gen8 with 2xSAS 15k rpm 48 Gb Ram). The hypervisor part is a minimal Centos 6.5 with

Hi everyone, I have a pile of data derived from an analytical device, which reports values as a continuous distribution. I need to associate classes (based on the Munsell color system) using a standard look-up table - the problem is that I would like to find the *closest* matching entry in the lookup table. I have attempted to do this by first creating as difference vector between color space

Hi, every body! I am a new comer for R, so my question would unavoidablely sounds stupid. Sorry! in my experiment, there are two type of soil ( soil F and soil D), each half of them were subjected to steam sterilize (result in FS and DS soil). A equal volume of soil from two of the four soil types (F, D, FS, DS) were mixed as follows: F+F, F+D, F+FS, F+DS, D+F, D+FS, D+DS, FS+DS (eight treatment).

Hi everyone, I want to plot a 3D interpolation of the concentration of aquatic organisms. My goal would be to have the result represented as clouds with a density proportional to the abundance of organisms, so that I could fly (well, swim actually ;) ) through the scene and see the patches here and there. Basically, I want to do something like this: http://www.youtube.com/watch?v=27mo_Y-aU-c but

I'm using Samba 3.0.3 on Fedora Core 2 with OpenLDAP 2.1.29 for a backend. I'm getting to typical "The user name could not be found." error upon trying to join a Windows box. I've gone through every digest on lists.samba.org and other sites and nothing has worked yet. Any suggestions: Here's what I've done so far: 1. Installed everything via RPMS: [root@smbtest

Greetings, After pouring over the documentation for the 'colorspace' package, I have not been able to figure out how the plot() method converts colorspace coordinates to RGB values for display on the screen. I am convert between colorspaces with the various as() methods... but cannot seem to find a way to extract RGB (i.e. for displaying on a computer screen) triplets from color space

Hi, every body! I am a new comer for R, so my question would unavoidablely sounds stupid. Sorry! In my experiment, there are two type of soil ( soil F and soil D), each half of them were subjected to steam sterilize (result in FS and DS soil). A equal volume of soil from two of the four soil types (F, D, FS, DS) were mixed as follows: F+F, F+D, F+FS, F+DS, D+F, D+FS, D+DS, FS+DS (eight

After, oh, six months of attempts here and there to read everyone's experiences with Samba/LDAP and inability for a windows 2000/XP machine to join the domain, I finally discovered what was not working properly. In my smb.conf I put: add machine script = /usr/local/sbin/smbldap-useradd -w "%u" As instructed by many How-to's and Idealx. However, I thought to myself, %m

Hi all, This is more a question in statistics, but I hope to get also the R practice for my question: I have an ancova model where the response variable is flowering (plant has a flower = 1, no flower = 0). The explanatory variables are leaf length, leaf thick (both continuous variables), and soil type (factorial with three levels): >

Dear R users, I'm estimating a mixed effects model in which the spatial correlation is controlled for by the "corGaus" structure. I'm wondering if there is a document or paper that explains how the spatial correlation structure (such as "corExp" or "corGaus") works. Let me use the example and data posted on UCLA's R FAQ webpage to explain my problems.

Dear all; First of all, this is probably a more conceptual question than a R-related one, but still want to give it a try. When working with the interpolation function "interp" from the package akima and the triangulation function "tri.mesh" from package tripack I've got NA's for the interpolation and "error" for the triangulation. The data is arranged in a