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,
Hi,
Got it fixed now, thanks everyone, still confused as to why it's never
done that before, but at least it's fine now.
Ben W.
On 19/03/2011 19:38, Henrik Bengtsson wrote:
Hi.
On Sat, Mar 19, 2011 at 12:17 PM, peter dalgaard wrote:
On Mar 19, 2011, at 17:37 , Ben Ward wrote:
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 worki
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
Is there really one for the iphone? As far as I was aware, apple had
beef about their policy agreements and the fact such software is open
source/free as in freedom.
I actually expected the situation would be the other way round: console
for android but none for iphone?
Ben W.
On 02/03/2011 1
7;s been a little experimental in places, in having to
adapt the methodology if a certain issue of practicality arose. But it's
nearly done now.
Thanks,
Ben W.
At 10:44 AM 2/26/2011, Ben Ward wrote:
On 25/02/2011 21:22, Ben Ward wrote:
Original Message
Subject:
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
To: Ben Ward
CC: r-help
I can hopefully save bandwidth here by suggesting that this belongs on
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 basicall
On 20/02/2011 18:52, David Winsemius wrote:
On Feb 20, 2011, at 1:27 PM, Ben Ward wrote:
However, the
Y ~ X + Y^2
Produces the best fitting line - it is pretty much on the data points
- I'm trying to make a standard curve, with which to take readings
from a spectrophotometer o
It is, I tried a glm with a poisson distribution, as was suggested to me
previously, but the Residual Deviance was too high - the book I'm
reading says it suggests overdispersion because it's way above the
Residual degrees of freedom:
glm(formula = Approximate.Counts ~ X..Light.Transmission, f
ogy student
so stats and hypothesis testing is taught, but doing this standard curve
is unprecedented in my work so far, normally lm() and anova and such is
enough.
Thanks,
Ben.
On 19/02/2011 19:06, David Winsemius wrote:
On Feb 19, 2011, at 1:08 PM, Ben Ward wrote:
Hi Graham,
Thanks, th
curate, within the range I will most likely be using it.
Thanks,
Ben.
On 19/02/2011 15:39, Graham Smith wrote:
> Ben,
>
> Does this help.
>
> http://r-eco-evo.blogspot.com/2011/01/confidence-intervals-for-regression.html
>
> Not sure if it will work with your particular model, but
I've just realised the couple of graphs I put on here have been stripped
off. If anyone has to see them and can't see my problem from code, I can
send them directly to anyone who thinks they can help but wants to see them.
Thanks,
Ben W.
On 18/02/2011 23:29, Ben Ward wrote:
Hi, I
e well, but not as good squaring Approximate
Counts does:
model <- lm(Approximate.Counts~X..Light.Transmission +
I(X..Light.Transmission^2), data=Standards)
Any advice is greatly appreciated, it's the first time I've really had
to look at regression with data in my coursework that i
: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
project.org] On Behalf Of Ben Ward
Sent: Thursday, January 06, 2011 2:00 PM
To: r-help@r-project.org
Subject: Re: [R] Assumptions for ANOVA: the right way to check the
normality
On 06/01/2011 20:29, Greg Snow wrote:
Some would argue to alw
On 06/01/2011 20:29, Greg Snow wrote:
> Some would argue to always use the kruskal wallis test since we never know
> for sure if we have normality. Personally I am not sure that I understand
> what exactly that test is really testing. Plus in your case you are doing a
> two-way anova and krusk
of task in mind?
Thanks,
Ben Ward.
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On 05/01/2011 17:40, Bert Gunter wrote:
My hypothesis was specified before I did my experiment. Whilst far from
perfect, I've tried to do the best I can to assess rise in resistance,
without going into genetics as it's not possible. (Although may be at the
next institution I've applied for MSc).
Original Message
Subject:Re: [R] Simulation - Natrual Selection
Date: Wed, 05 Jan 2011 17:24:05 +
From: Ben Ward
To: Bert Gunter
CC: Mike Marchywka
On 05/01/2011 17:08, Bert Gunter wrote:
> Couple of brief comments inline below. -- Bert
>
On 05/01/2011 16:37, Mike Marchywka wrote:
Date: Wed, 5 Jan 2011 15:48:46 +
From: benjamin.w...@bathspa.org
To: r-help@r-project.org
Subject: [R] Simulation - Natrual Selection
Hi,
I've been modelling some data over the past few days, of my work,
repeatedly challenging microbes to a ce
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
aults might be suitable for what I'm doing?
On 04/01/2011 17:56, Ben Ward wrote:
Ok I'll check I understand:
So it's using sample, to resample d once, 10 values, because the rnorm
has 10 values, with replacement (I assume thats the TRUE part).
Then a for loop has this to resamp
Ok I'll check I understand:
So it's using sample, to resample d once, 10 values, because the rnorm
has 10 values, with replacement (I assume thats the TRUE part).
Then a for loop has this to resample the data - in the loop's case its
1000 times. Then it does a lm to get the coefficients and add
understanding, the * is the
problem because it hasn't got this .repeater value attributed to it?
Thanks,
Ben Ward.
On 04/01/2011 12:30, Erich Neuwirth wrote:
It seems that the textbook workspace you are using as a method
definition for * for class repeater. Load the workspace and t
g
functions in R than I do, that might know why this is giving me the
error? I don't understand why one workspace would accept the model
formula, when the other give me the non-numeric argument to binary
vector, the only vector that's not numerical is Replicate, but I don't
hough I'm not used to doing this sort of operation in R so I don't
want to do the wrong thing.
If anyon could tell me if that would work or what I need to do instead
I'd be eternally greatful.
Thanks,
Ben Ward.
__
R-help@r-project.org ma
On 02/01/2011 23:28, Mkip wrote:
Does anyone know if a free iphone 3G app for R is available now?
Thanks,
Matilda Gogos
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