Displaying 14 results from an estimated 14 matches for "bathspa".
2011 Feb 26
2
[R-sig-ME] Fwd: Re: ANOVA and Pseudoreplication in R
On 25/02/2011 21:22, Ben Ward wrote:
>
> -------- Original Message --------
> Subject: Re: [R] ANOVA and Pseudoreplication in R
> Date: Fri, 25 Feb 2011 12:10:14 -0800
> From: Bert Gunter<gunter.berton at gene.com>
> To: Ben Ward<benjamin.ward at bathspa.org>
> CC: r-help<r-help at r-project.org>
>
>
>
> I can hopefully save bandwidth here by suggesting that this belongs on
> the R-sig-mixed-models list.
>
> -- Bert
>
> As an aside, shouldn't you be figuring this out yourself or seeking local consulting e...
2011 Jan 05
0
Fwd: Re: Simulation - Natrual Selection
-------- Original Message --------
Subject: Re: [R] Simulation - Natrual Selection
Date: Wed, 05 Jan 2011 17:24:05 +0000
From: Ben Ward <benjamin.ward@bathspa.org>
To: Bert Gunter <gunter.berton@gene.com>
CC: Mike Marchywka <marchywka@hotmail.com>
On 05/01/2011 17:08, Bert Gunter wrote:
> Couple of brief comments inline below. -- Bert
>
> On Wed, Jan 5, 2011 at 8:56 AM, Ben Ward<benjamin.ward@bathspa.org> wrote:
>...
2011 Mar 19
2
Libraries issue
Hi, I've just discovered R keeps installing my packages into
C:\Users\Ben instead of "C:\\Users\\Ben;/R/win-library/2.12" which is
what is returned by running Sys.getenv("R_LIBS_USER").
I've tried setting environment variables in windows control panel of
R_LIBS.
But nothing seems to be working, it still wants to fill my user folder,
I've tried uninstalling
2011 Feb 18
3
Confidence Intervals on Standard Curve
Hi, I wonder if anyone could advise me with this:
I've been trying to make a standard curve in R with lm() of some
standards from a spectrophotometer, so as I can express the curve as a
formula, and so obtain values from my treated samples by plugging in
readings into the formula, instead of trying to judge things by eye,
with a curve drawn by hand.
It is a curve and so I used the
2011 Feb 25
1
ANOVA and Pseudoreplication in R
Hi, As part of my dissertation, I'm going to be doing an Anova,
comparing the "dead zone" diameters on plates of microbial growth with
little paper disks "loaded" with antimicrobial, a clear zone appears
where death occurs, the size depending on the strength and
succeptibility. So it's basically 4 different treatments, and I'm
comparing the diameters (in mm) of
2011 Jan 05
2
Simulation - Natrual Selection
Hi,
I've been modelling some data over the past few days, of my work,
repeatedly challenging microbes to a certain concentration of cleaner,
until the required concentration to inhibit or kill them increaces, at
which point they are challenged to a slightly higher concentration each
day. I'm doing ths for two different cleaners and I'm collecting the
required concentration to
2011 Jan 05
3
Assumptions for ANOVA: the right way to check the normality
Dear all,
I would like to know which is the right way to check the normality assumption
for performing ANOVA. How do you check normality for the following example?
I did an experiment where people had to evaluate on a 7 point scale, the degree
of realism of some stimuli presented in 2 conditions.
The problem is that if I check normality with the Shapiro test I get that the
data are not
2011 Jan 02
0
Windows 7, R and org-babel issue
Hi, I'm hoping somebody can help me with this I'm a little stuck, I've
followed the method as closely to the Linux way to get org mode exporting to
pdf through latex my work with R.
I have emacs extracted and installed to Program Files, and ran "addpm", I
have Rterm in my path, and I extracted ESS and Org 7.4 to Program
Files\emacs-22.3\site lisp. I've edited
2010 Aug 11
1
odfWeave Issue.
Hi, I'm trying to put a document through odfWeave that has some R code for
coursework in it:
> library(odfWeave)
Loading required package: lattice
Loading required package: XML
> inFile = "~/Documents/Squirrel.odf"
> outFile = "~/Documents/ Squirrel Out.odt"
> inFile = "~/Documents/Squirrel.odt"
> odfWeave (inFile, outFile)
But when I do this I
2011 Apr 07
1
Randomisation tests
Hi,
I want to ue a randomisation test, to compare two sample means, for a
small set of data, I've looked at towt.permutation, perm.test and
permtest, as well as permTS(), which is the best one to use for such a
simple purpose? I know perm.test package isn't used anymore and coins
recommended, but reading the manual I couldnt find the function most
like it, ore more likely I
2011 Jan 04
1
Resampling to find Confidence intervals
Hi, I'm doing some modelling (lm) for my 3rd year dissertation and I
want to do some resampling, especially as I'm working with microbes,
getting them to evolve resistance to antimicrobial compounds, and after
each exposure I'm measuring the minimum concentration required to kill
them (which I'm expecting to rise over time, or exposures), I have 5
lineages per cleaner, and
2011 Mar 14
0
Non-constancy of variances in mixed model.
Hi, I've been doing an experiment, measuring the dead-zone-diameters of
bacteria, when they've been grown with paper diffusion disks of
antimicrobial. There are two groups, or treatments - one is bacteria
that have been cultured in said antimicrobial for the past year, the
other group is of the same species, but lab stock and has not gone had
any prior contact with the antimicrobial.
2011 Jan 06
1
Splitting a Vector
Hi all,
I read in a text book, that you can examine a variable that is colinear
with others, and giving different ANOVA output and explanatory power
when ordered differently in the model forula, by modelling that
explanatory variable, against the others colinear with it. Then, using
that information to split the vector (explanatory variable) in question,
into two new vectors, one should
2011 Jan 04
3
Writing do and resample functions
Hi,
I'm trying to take a function from a workspace download provided in a
stats textbook book, so I have it in my workspace to use all the time.
I opened the workspace and typed the names of the two functions to get
the code that makes them up:
-------------------------------------------------------------------------------------
> resample
function(d, size,