Trawled through messages on here and read Rdegva but couldnt find the answer.
Are there any user friendly windows user guides about all this?
R 2.8.1
Windows XP 2003
Cheers, Si.
Dr. Simon Pickett
Research Ecologist
Land Use Department
Terrestrial Unit
British Trust for Ornithology
The Nunnery
I think you can then use merge() to merge them back together
n- merge(n, df, by.x = c(m.values), by.y = c(Start), all.x = F, all.y =
F)
also see ?aggregate for a more efficient solution.
HTH, Si.
- Original Message -
From: Schönemann, Rene rschoenem...@railways.tu-berlin.de
To:
,pond,field,river)
))
Is there an eloquent, efficient way of doing this? My solution involves lots of
intermediate aggregated data frames, one for each habitat, then a series of
merges onto a bigger data frame.
Thanks peeps and have a good weekend,
Simon.
Dr. Simon Pickett
Research
have a read at these pdfs
http://cran.r-project.org/other-docs.html
you are likely to get a bashing for asking people to do your homework for
you!
Simon.
- Original Message -
From: abel1682 lizard_1...@yahoo.it
To: r-help@r-project.org
Sent: Tuesday, May 26, 2009 3:37 PM
Subject:
z-c(x,y)
cheers, Simon.
- Original Message -
From: Henning Wildhagen hwildha...@gmx.de
To: r-help@r-project.org
Sent: Monday, May 18, 2009 12:09 PM
Subject: [R] Concatenating two vectors into one
Dear users,
a very simple question:
Given two vectors x and y
you mean you want to plot SUM against month? (assuming these12 data frames
are 12 months).
you could first bind them all together using data.frame(), see ?data.frame
which would make it much easier.
you need to create a variable for months then plot it against your variable.
If you dont
you mean you want to plot SUM against month? (assuming these12 data frames
are 12 months).
you could first bind them all together using data.frame(), see ?data.frame
which would make it much easier.
you need to create a variable for months then plot it against your variable.
If you dont
Sorry,
I saw the word concatenate and dived in. Andrew Dolmans solution works fine.
Simon.
- Original Message -
From: Linlin Yan yanlinli...@gmail.com
To: Simon Pickett simon.pick...@bto.org
Cc: Henning Wildhagen hwildha...@gmx.de; r-help@r-project.org
Sent: Monday, May 18, 2009 12
you mean you want to plot SUM against month? (assuming these12 data frames
are 12 months).
you could first bind them all together using data.frame(), see ?data.frame
which would make it much easier.
you need to create a variable for months then plot it against your variable.
If you dont
read ?par
1.use ylab= to suppress y labels, then mxtext to manually draw em yourself
OR use mgp=... within par()
2.use xlab not xlim to change the x axis labels
HTH, Si.
- Original Message -
From: Steve Murray smurray...@hotmail.com
To: simon.pick...@bto.org; r-help@r-project.org;
Hi Steve,
you need to use the expression() function. I think it is described under
?plotmath. Defo works with mtext, not sure about ylab.
try
ylab(text=c(expression(paste(Hatched Eggs R^{2}
etc.
- Original Message -
From: steve_fried...@nps.gov
To: r-help@r-project.org
Sent:
Read about glm by typing
?glm
There are tons of books and pdfs out there to show you the basics.
http://cran.r-project.org/other-docs.html
HTH, Si.
- Original Message -
From: H Z zamani_...@yahoo.com
To: r-help@r-project.org
Sent: Friday, May 15, 2009 12:26 PM
Subject: [R] need
Absolutely no idea what you mean,
Try reconstructing your question in concise English with reproducible code.
Simon.
- Original Message -
From: deanj2k dl...@le.ac.uk
To: r-help@r-project.org
Sent: Friday, May 15, 2009 1:33 PM
Subject: [R] displaying results
Hi everyone, can
I'm afraid I have no experience with the clue package, but if all else fails
you could consider the hclust package.
You change font size in the conventional way with this.
Cheers, Simon.
- Original Message -
From: Penner, Johannes johannes.pen...@mfn-berlin.de
To:
can you provide reproducible code please?
even a fake example would help.
I would
1) set up a loop to read in each file from a directory
2) inside the loop chop up/ aggregate the data, each file in turn and spit
each new aggreagated file out to a directory using write.table(). This will
at least he/she is resourceful! (but also very naughty)
- Original Message -
From: steve_fried...@nps.gov
To: ayaku1...@gmail.com
Cc: r-help@r-project.org; r-help-boun...@r-project.org
Sent: Friday, May 08, 2009 12:48 PM
Subject: Re: [R] I'm offering $300 for someone who know
I bet at least a few people offered their services! It might be an
undercover sting operation to weed out the unethical amongst us :-)
- Original Message -
From: Wacek Kusnierczyk waclaw.marcin.kusnierc...@idi.ntnu.no
To: Tung86 wyut...@gmail.com
Cc: R help r-h...@stat.math.ethz.ch
My institute uses SAS religiously, I am the only R heathen.
I have resisted learning to use SAS because I dont see the point after years
of using R and I like being able to do everything using one program.
However, my colleagues maintain that SAS is better for programming without
really ever
Thanks Laura,
I deal with huge data sets and have to do alot of fancy juggling of data to get
the job done in R.
I have recently been granted access to a cluster at a university which means 64
bit machines with 8gb of memory, which could prove to be a saviour
hopefully.
Simon.
-
Hi,
Check out the FAQ on the home page about installing packages.
You need to
1. Install the package from a local mirror, you can do this from the drop
down menu (Install packages)
2. then call the package using library(name of the package)
It helps to know where your R library directory is
I actually get superior results from creating a pdf, opening it in adobe
acrobat, adjust the image size so it is big as possible with the screen,
then copying it into word (by using the little square capture icon).
HTH, Simon.
- Original Message -
From: jjh21 jjhar...@gmail.com
To:
in pm.readmagicnumber(con) : Not a PNM format file
I have tried changing the dpi when I export the image but still no cigar.
I have dredged the help forum for related files and read the help files. My Os
is windows XP and i'm running 2.8.1.
I feel I'm missing something obvious!
Thanks
Dr. Simon
I would suggest avoiding the function ?assign inside a loop. I used top use
this until someone here kindly pointed out that it was much easier to catch
the data of interest in a list...
eg.
df.list - vector(list, length(10))
for (i in 1:10)}
Hi,
I'm pretty sure you dont mean merge since merge() creates a new big data
frame from two small ones. It appears that you want to omit some rows.
As I said before, get used to selecting rows like this
data.frame-data.frame[data.frame$conditional.rows1000,]
(for example)
Although I dont
Hi All,
act_2
DateDtime Hour Min Second Rep
51 2006-02-22 14:52:18 14 52 18 useractivity_act
52 2006-02-22 14:52:18 14 52 18 4
55 2006-02-22 14:52:49 14 52 49 4
57 2006-02-22 14:52:51 14 52 51
Also check out these pdfs
http://cran.r-project.org/other-docs.html
and try to get your hands on the bible
http://www.amazon.co.uk/R-Book-Michael-J-Crawley/dp/0470510242
Simon.
Hi Emma,
Continuous predictors are no problem at all. You can mix both continuous
and categorial predictors if
)
anova(model1,model2)
, but how do I test the interaction?
Thanks in advance,
Simon.
Dr. Simon Pickett
Research Ecologist
Land Use Department
Terrestrial Unit
British Trust for Ornithology
The Nunnery
Thetford
Norfolk
IP242PU
01842750050
[[alternative HTML version deleted
possible do
to that using a glm approach. I think I have to run separate models for each
site, calculate the gradient, then do a lm with gradient explained by
habitat score
Thanks, Simon.
On Tue, Mar 10, 2009 at 10:15 AM, Simon Pickett simon.pick...@bto.org
wrote:
This is partly
I got the same spam message today and I havent signed up for anything except
this forum mailing list.
The software they are trying to sell doesnt seem to cover any new ground
anyway.
Simon.
- Original Message -
From: Thomas Lumley tlum...@u.washington.edu
To: ronggui
Hi Laura,
You need to specify where you want to write your table. Like this...
write.table(result, file=C:/Documents and
Settings/simonp/Desktop/result.csv, sep = ,,row.names = F)
If you have to do this alot I think you can set your working drive up to
always write table in the same
Hi Oliver,
1) thats easy, if you want to display several graphs at once type windows(),
once for each new graph.
2) Not sure exactly what you mean here but you have complete control over
graphs in R. e.g. plot a blank graph then add axex using axis(), add points
using points(), etc. etc.
it is not in an interaction?
Thanks in advance,
Simon.
Dr. Simon Pickett
Research Ecologist
Land Use Department
Terrestrial Unit
British Trust for Ornithology
The Nunnery
Thetford
Norfolk
IP242PU
01842750050
[[alternative HTML version deleted
Sorry, that was a typo in the email, not the model. So I still have the
problem.
Cheers, Simon.
- Original Message -
From: Ted Harding ted.hard...@manchester.ac.uk
To: Simon Pickett simon.pick...@bto.org; r-help@r-project.org
Sent: Thursday, February 19, 2009 10:56 AM
Subject
.
- Original Message -
From: markle...@verizon.net
To: Simon Pickett simon.pick...@bto.org
Sent: Thursday, February 19, 2009 10:50 AM
Subject: RE: [R] type III effect from glm()
Hi Simon: John Fox can say a lot more about below but I've been reading
his book over and over recently and one thing
Hi James,
What you really need to do is to check out the many freely available pdfs
for R beginners. Here is a good place to start
http://cran.r-project.org/other-docs.html
If I am right interpreting what you want, I think you need to create a blank
plot with no axes, axis labels etc. Try
someone has probably answered this already but use
substr()
new variable-substr(old.variable,1,1)
Simon.
- Original Message -
From: kayj kjaj...@yahoo.com
To: r-help@r-project.org
Sent: Tuesday, February 10, 2009 6:50 PM
Subject: [R] How to split a character vector into 3 vectors
the names might
often be very big if the data frame was created using a function). Side-ways
scrolling is quite jerky too.
Just wondered if this was on anyone else's wish list?
Simon.
Dr. Simon Pickett
Research Ecologist
Land Use Department
Terrestrial Unit
British Trust for Ornithology
The Nunnery
)
x-c(3,4,5,2,3,6,3,7,4,8,5,8,3)
m1-zeroinfl(y~x|x)
Zero-Inflated Count Model
Using logit to model zero vs non-zero
Using Poisson for counts
Error in terms.formula(formula, data = data) :
argument is not a valid model
Can anyone shed any light please?
Simon.
Dr. Simon Pickett
Research
Hi all,
How would you create a list of data.frames within a loop, then bind all the
elements of the list using rbind?
take this example of matrices with differing numbers of rows
for(i in 1:3){
assign(paste(s,i, sep=),matrix(data = NA, nrow = i, ncol = 3, byrow =
FALSE, dimnames = NULL))
}
Hi all,
I want to calculate the number of unique observations of y in each level
of x from my data frame df.
this does the job but it is very slow for this big data frame (159503 rows,
11 columns).
group.list - split(df$y,df$x)
count - function(x) length(unique(na.omit(x)))
Allen,
I would suggest reading about the str() function. It's great for getting
inside model outputs and seeing how they are constructed so you can
extract all the specific calculations you want.
Its a bit fiddly to get used to but there are plenty of examples on this
forum.
Hope this
I would like to add that I would have spent many more years doing my PhD if
it wasnt for R! all data management, statistics and graphics were conducted
using it. This was the direction my university and many more research
institutes appear to be heading.
It probably doesnt get said enough and
Hi Gundala,
try chopping off the top row like
newx-as.matrix(x[2:dim(x)[1],])
OR
try changing it to a data frame...
new x-data.frame(x,row.names=NULL)
#pretty sure its not row.names but there is probably an equivalent for
col.names
OR
look into ?read.table and specify header = F
Cheers,
type
?memory
into R and that will explain what to do...
S
- Original Message -
From: Edwin Sendjaja edw...@web.de
To: r-help@r-project.org
Sent: Tuesday, January 06, 2009 11:41 AM
Subject: [R] Large Dataset
Hi alI,
I have a 3.1 GB Dataset ( with 11 coloumns and lots data in int
Only a couple of weeks ago I had to deal with this.
adjust the memory limit as follows, although you might not want 4000, that
is quite high
memory.limit(size = 4000)
Simon.
- Original Message -
From: Edwin Sendjaja edw...@web.de
To: Simon Pickett simon.pick...@bto.org
Cc: r
Yup, it was a typo. But I always try capital if lower case doesnt work,
Sorry.
- Original Message -
From: David Winsemius dwinsem...@comcast.net
To: Simon Pickett simon.pick...@bto.org
Cc: Edwin Sendjaja edw...@web.de; r-help@r-project.org
Sent: Tuesday, January 06, 2009 12:40 PM
of luck.
Simon.
- Original Message -
From: Edwin Sendjaja edw...@web.de
To: Simon Pickett simon.pick...@bto.org
Cc: r-help@r-project.org
Sent: Tuesday, January 06, 2009 2:53 PM
Subject: Re: [R] Large Dataset
Hi Simon,
My RAM is only 3.2 GB (actually it should be 4 GB, but my
edw...@web.de
To: Simon Pickett simon.pick...@bto.org
Cc: r-help@r-project.org
Sent: Tuesday, January 06, 2009 5:04 PM
Subject: Re: [R] Large Dataset
Hi Simons,
Is SAS more powerfull than R?
Well, I think I cannot afford to buy SAS.
actually, my computer isn't really slow. I think 4GB RAM
learning curve, but once you get to grips with the basics,
I've found that I can find out everything else I need to know by searching
these archives...
Hope this helps,
Simon Pickett.
- Original Message -
From: Uwe Ligges lig...@statistik.tu-dortmund.de
To: xavier ordoñez rlistxa
I'm pretty sure you have to work it out yourself. Here is an example of how
you would tabulate the AIC weights from three models (check that my
calculations are correct before using this yourself!).
Basically model.name$aic will cut out the AIC values then write a formula to
calculate the
probably best just to change each variable one by one to the correct
classification after you have read the data frame in.
variable-as.character(variable)
- Original Message -
From: threshold r.kozar...@gmail.com
To: r-help@r-project.org
Sent: Friday, December 19, 2008 12:35 PM
yes I did, sorry. obviously good for stats rather than general code but
still good bed time reading :-)
Simon.
- Original Message -
From: June Kim junea...@gmail.com
To: Simon Pickett simon.pick...@bto.org
Sent: Friday, December 19, 2008 3:28 PM
Subject: Re: [R] I need course in R
Wow, thats amazing, thanks very much!!!
Simon.
- Original Message -
From: Henrique Dallazuanna
To: Simon Pickett
Cc: r-help@r-project.org
Sent: Thursday, December 18, 2008 11:25 AM
Subject: Re: [R] inserting zero instances with zeroes in a matrix
Try
...@gmail.com
Cc: Simon Pickett simon.pick...@bto.org; r-help@r-project.org
Sent: Thursday, December 18, 2008 11:51 AM
Subject: Re: [R] inserting zero instances with zeroes in a matrix
Try this:
as.data.frame(xtabs(count ~., d.f))
On Thu, Dec 18, 2008 at 6:25 AM, Henrique Dallazuanna www...@gmail.com
Actually,
Both these solutions create contingency tables, with frequency rather than
the original count values. Is there a way to retain the original count
values?
Thanks again, Simon.
- Original Message -
From: Simon Pickett simon.pick...@bto.org
To: Gabor Grothendieck ggrothendi
using R 2.1.1 on
Windows Vista.
Can anyone suggest a faster/more reliable alternative alternative
please? Needless to say I am a programming novice.
Thanks in advance,
Simon Pickett.
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