Thanks Giorgio and Jim. This info is exactly what I needed.
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__
Also:
https://cran.r-project.org/web/views/Survival.html
https://www.youtube.com/watch?v=1Mt7EuVJf1A
http://gking.harvard.edu/files/gking/files/0s.pdf?m=1360039053
http://biostat.mc.vanderbilt.edu/wiki/pub/Main/RmS/rms.pdf
---
Giorgio Garziano
__
R-he
Hi Mark,
You might find the eventInterval package of use.
Jim
On Sat, Sep 26, 2015 at 8:33 AM, markshanks
wrote:
> Hi,
>
> I have only a relatively basic background in statistics (e.g., anova,
> regression), and the books on R I have read so far have focused on
> relatively common statistical
Hi,
I may suggest the following book introducing event history analysis with R and
showing some datasets to work with:
https://www.crcpress.com/Event-History-Analysis-with-R/Brostrm/9781439831649
I am not sure it can answer all your questions about your specific problem
(rare events),
however i
Hi Nezahat,
First, you are storing the code of the function "numeric" in x1 and
x2. You probably want to use:
x1<-numeric()
x2<-numeric()
Second, you are then storing the output of your aov summary (a list)
in x1, which requires a bit of analysis to get the information you
want (i.e. p value). Th
Dear Nezahat
In future it would be helpful if you
1 - gave us the data so we can reproduce what you are doing
2 - told us what the error was in case we cannot replicate ti
3 - did not post in HTML as it messes up everything in your post
What did you think x1 <- numeric was going to do?
Try
x1 <-
Paul, I happen to be working on the exact same problem. If you found a
solution somewhere, please let me know. I will do the same if I stumble onto
a solution first.
Rich - cost information can be collected prospectively but be censored due
to incomplete follow-up or some other similar reason. Thi
For the t-test, you used the two-tailed t-test. It is the default. Here I
think you should set alternative="less" in the t.test function.
2014-06-29 8:41 GMT-05:00 dhs :
> Trying to understand how to analyze my data, sample data follows. I want
> to know if the student scores increased from sem
On Wed, 23 Apr 2014, Paul Miller wrote:
Am intested in using R to analyze censored cost data.
Paul,
What are censored cost data? Too high to be affordable; too low to cover
materials?
My best guess so far is the NADA package. Not sure if this is the best
thing to do what I need though.
Don't know if the data will support the result that you want but the
only way to get some sort of answer is to hire a statistician.
ranjan
On Wed, 13 Nov 2013 20:58:30 -0400 Jim Silverton
wrote:
> Hi,
>
>
>
> I have 187 urine cultures which were subjected to culture and microscopy
> methods.
HI,
Try this:
res2<-aov(time~factor(drug),data=example12_7)
summary(res2)
# Df Sum Sq Mean Sq F value Pr(>F)
#factor(drug) 2 21.98 10.991 4.188 0.0345 *
#Residuals 16 41.99 2.624
#---
#Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
A.K.
Hi D,
R is taking drug as numeric, you ned indicate to R that drug is a factor:
> example12_7$drug <-factor(example12_7$drug)
> ej2<-aov(time~drug,data=example12_7)
> summary(ej2)
Df Sum Sq Mean Sq F value Pr(>F)
drug 2 21.98 10.991 4.188 0.0345 *
Residuals 16 41.99
There are several packages to do this, with probably rgdal as the most
general for reading - it will read many image formats as a
SpatialGridDataFrame (class from package sp). This class behaves like
a data.frame in many ways and can be coerced to one with
as.data.frame. Non-spatial image formats w
Here are some tutorials to R:
http://www.cyclismo.org/tutorial/R/
http://www.statmethods.net/
Or just search on the web.
Good luck,
A.
On Fri, 14 Oct 2011 09:29:52 +0300
Peter Kaiga wrote:
> i'm actually new at R, but to me its going to be big time, i want to do an
> analysis for the attach
On 10/14/2011 06:29 AM, Peter Kaiga wrote:
> i'm actually new at R, but to me its going to be big time, i want to do an
> analysis for the attached data, like define variables and then analyse get
> means, variances, histogram, and other important attributes including cross
> tabs
Hi,
Thanks for
at least provide a sample of the data. It sounds like you have 'factors' as
your data. Do an 'str' of your dataframe that was returned.
Sent from my iPad
On Jun 19, 2011, at 22:57, amrita gs wrote:
> Hi everyone,
>
> I have certain values retrieved from mysql database.How can i do
> cer
Please tell us the package you are using and the specific commands. It
is most likely you are retrieving the data into a list or some other
structure that hist() doesn't like.
On Mon, Jun 20, 2011 at 12:57 PM, amrita gs wrote:
> Hi everyone,
>
> I have certain values retrieved from mysql dat
roject.org [r-help-boun...@r-project.org] on behalf of
Andrew Robinson [a.robin...@ms.unimelb.edu.au]
Sent: Friday, April 29, 2011 8:05 PM
To: Cristiano Yuji Sasada Sato
Cc: r-help@r-project.org
Subject: Re: [R] Analysis and graphics by groups
hi Christiano,
the error is that FUN is not a funct
hi Christiano,
the error is that FUN is not a function. That is true, the argument
that you are passing to FUN is a different class. Instead of fx, for
example, where fx is your model code below, try to write it as a
function of the arguments that you want to split by Cerca.
You might try to con
Hello,
This is my first post in this e-mail list and I hope it's enough to justify
calling for help. In case it's not, sorry.
I'm trying to do analysis and graphics using a factor as a criteria to split
data and do the analysis/graphics for each subset of data.
Right now what I'm trying to do is
Hi Eli
I have "inherited" a cDNA macroarray dataset that is structured as follows.
Three different stressors were tested. For each stressor, there are two
treatments (control and stressed). For each treatment, two biological
replicates exist, and these are paired (i.e., there is a stressed arr
José Ignacio Bustos Melo wrote:
> Hi everyone,
>
> I'm studying the manual name: Analysis of Epidemiological Data Using
> R and Epicalc, maked by: Virasakdi Chongsuvivatwong and Edward McNeil.
>
> And I can't find the data base that they use in some examples, this are
> the names:
>
> Chapter7.Rdat
Rainer M Krug gmail.com> writes:
>
> Hi
>
> I am running analysis with Kcross from the package spatstat and I am getting
> a message that R can not allocate enough memory for a vector of 900MB.
> R seems to be running towards the 2GB limit per process.
>
> The dataset is not to big (ca 3000 p
eg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
[EMAIL PROTECTED]
(801) 408-8111
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Prof Brian Ripley
> Sent: Friday, November 16, 2007 11:47 PM
> To: sj
> Cc: r
Prof Brian Ripley a écrit :
[ ... ]
> What is strange is that no one has ever thanked us for finding out
> (despite most Microsoft documentation) that you can get up to 3.5Gb in a
> 32-bit process on certain 64-bit versions of Windows and enabling you to
> use it in recent versions of R.
Maybe
On Fri, 16 Nov 2007, sj wrote:
> All,
>
> I am working with a large data set (~ 450,000 rows by 34 columns) I am
> trying to fit a regression model (I have tried to use several procedures psm
> (Design package) lm, glm). However whenever I try to fit the model I get the
> following error:
>
>
> Er
Spencer,
There have been a lot of discussions on these boards re working with
large datasets in R, so looking through those will probably inform you
better than I'll be able to. So with that said...
I have been trying to work with very large datasets as well (genetic
datasets... maybe we're in th
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