Dear all,
I am familiar with obtaining the value corresponding to a chosen
probability via the quantile function.
Now I am facing the opposite problem I have a value an want to know it's
corresponding percentile in the distribution. So is there a function for
this as well?
Thank you for your
03.03.12 14:33, schrieb peter dalgaard:
On Mar 3, 2012, at 13:37 , drflxms wrote:
Dear all,
I am familiar with obtaining the value corresponding to a chosen
probability via the quantile function.
Now I am facing the opposite problem I have a value an want to know it's
corresponding percentile
Dear all,
I created a bivariate normal distribution:
set.seed(138813)
n-100
x-rnorm(n); y-rnorm(n)
and plotted a scatterplot of it:
plot(x,y)
Now I'd like to add the 2D-standard deviation.
I found a thread regarding plotting arbitrary confidence boundaries from
Pascal Hänggi
03.03.12 15:54, schrieb drflxms:
Dear all,
I created a bivariate normal distribution:
set.seed(138813)
n-100
x-rnorm(n); y-rnorm(n)
and plotted a scatterplot of it:
plot(x,y)
Now I'd like to add the 2D-standard deviation.
I found a thread regarding plotting arbitrary confidence
in the package)
for a simple way of showing a confidence region for bivariate data on
a plot (a 68% confidence interval is about 1 SD if you just want to
show 1 SD).
On Sat, Mar 3, 2012 at 7:54 AM, drflxms drfl...@googlemail.com wrote:
Dear all,
I created a bivariate normal distribution:
set.seed
:
On Mar 3, 2012, at 17:01 , drflxms wrote:
# this is the critical block, which I still do not comprehend in detail
z - array()
for (i in 1:n){
z.x - max(which(den$x x[i]))
z.y - max(which(den$y y[i]))
z[i] - den$z[z.x, z.y]
}
As far as I can tell, the point
=c(1,2,1),plot.dens=TRUE,
xlab=X, ylab=Y)
}
Am 03.03.12 19:56, schrieb David Winsemius:
On Mar 3, 2012, at 12:34 PM, drflxms wrote:
Thanx a lot Greg for the hint and letting me not alone with this!
Tried ellipse and it works well. But I am looking for something more
precise. The ellipse
/v1 +x2^2/v2 is chi
squared distributed with 2 degrees of freedom.
So if you really want to you can try to approximate the contours in
some other way, but any decent approach will just converge to the
ellipse.
On Sat, Mar 3, 2012 at 1:26 PM, drflxms drfl...@googlemail.com wrote:
Wow, David
, schrieb peter dalgaard:
On Mar 3, 2012, at 20:25 , drflxms wrote:
Once you go into two dimensions, SD loses all meaning, and adding
nonparametric density estimation into the mix doesn't help, so just stop
thinking in those terms!
This makes me really think a lot! Is plotting the 0,68
. Should be equivalent in theory.
Felix
Am 03.03.12 22:13, schrieb peter dalgaard:
On Mar 3, 2012, at 20:25 , drflxms wrote:
Once you go into two dimensions, SD loses all meaning, and adding
nonparametric density estimation into the mix doesn't help, so just stop
thinking in those terms
Dear R colleagues,
for a statistics tutorial I want to develop a nice 3d-graphic of the
well known target comparison/analogy of accuracy and precision (see i.e.
http://en.wikipedia.org/wiki/Accuracy_and_precision for a simple hand
made 2d graphic).
The code for a really beautiful graphic is
Am 08.01.12 13:52, schrieb Vincent Zoonekynd:
On 7 January 2012 19:48, drflxms drfl...@googlemail.com wrote:
as I am dealing with complex confusion matrices, I wonder whether there
might be a way to colour text/tabular data in R. I.e. imagine
highlighting the true positive values or certain
Am 07.01.12 21:12, schrieb Michael Friendly:
On 1/7/2012 5:48 AM, drflxms wrote:
Hi everybody,
as I am dealing with complex confusion matrices, I wonder whether there
might be a way to colour text/tabular data in R. I.e. imagine
highlighting the true positive values or certain classes
Hi Andrew,
I am aware, that this is an R-mailing list, but for such tasks (I deal a
lot with huge genomic datasets) I tend to use awk and sed for
preprocessing of data, in case I run into performance problems.
Otherwise for handling of strings in R I recommend stringr library, but
I don't know
Hi everybody,
as I am dealing with complex confusion matrices, I wonder whether there
might be a way to colour text/tabular data in R. I.e. imagine
highlighting the true positive values or certain classes in a table.
I know how to colour text in graphical output as well as how to sweave
or
Dear R colleagues,
consider my data.frame named df with 3 columns - being level,
prevalence and sensitivity - and 7 rows of data (see dump below).
df -
structure(list(level = structure(1:7, .Label = c(0, 1, 10,
100, 1010, 11, 110), class = factor), prevalence =
structure(c(4L,
2L, 3L, 5L, 6L,
) .OO#. .OO#. rocks...1k
---
Sent from my phone. Please excuse my brevity.
drflxms drfl...@googlemail.com wrote:
Dear R colleagues,
consider my data.frame named df with 3 columns - being level
Dear R colleagues,
as result of a function a huge list is generated. From this result list
I'd like to extract information.
Think of the list i.e. as an object named listResult with the
following form:
[[a]]
[1] [2] [3] [4] [5]
[[b]]
[1] [2] [3] [4] [5]
[[c]]
[1] [2] [3] [4] [5]
where
identical(A$a,A[[1]])
TRUE
If this doesn't work, please clarify what exactly the object you have is and
what you are trying to get out of it and I'll give a more concrete answer.
On Tue, Sep 13, 2011 at 4:11 AM, drflxms drfl...@googlemail.com wrote:
Dear R colleagues,
as result of a function
Dear colleagues,
I have really heavy problems in sorting the results of a table according
to certain features of the levels in the table.
Prerequisites:
It all starts with a fairly simple data set, which stores observations
of 21 observers (horizontally from 1 to 21; 21 is
Dear R colleagues,
I face a seemingly simple problem I couldn't find a solution for myself
so far:
I have to sum the digits of numbers. Example: 1010 -2 100100110 - 4
Unfortunately there seems not to be a function for this task. So my idea
was to use sum(x) for it. But I did not figure out how
Dimitris Rizopoulos:
one way is using function strsplit(), e.g.,
x - c(100100110, 1001001, 1101, 00101)
sapply(strsplit(x, ), function (x) sum(x == 1))
I hope it helps.
Best,
Dimitris
On 3/4/2011 2:18 PM, drflxms wrote:
Dear R colleagues,
I face a seemingly simple problem I
Dear R colleagues,
as a result of my calculations regarding the inter-observer-variability
in bronchoscopy, I get a confusion matrix like the following:
0 1 1001 1010 11
0609 11 54 36 6
1 1 260 2
1014 008 4
1004 000 0
1000 23
Dear community,
unfortunately I did not manage load the rJava package receiving the following
error-message:
library(rJava)
Error in inDL(x, as.logical(local), as.logical(now), ...) :
kann shared library 'C:/Programme/R/2.8.1/library/rJava/libs/rJava.dll' nicht
laden:
LoadLibrary failure:
, drflxms wrote:
Dear community,
unfortunately I did not manage load the rJava package receiving the
following
error-message:
library(rJava)
Error in inDL(x, as.logical(local), as.logical(now), ...) : kann
shared library 'C:/Programme/R/2.8.1/library/rJava/libs/rJava.dll' nicht
laden
Dear R-colleagues,
another question from a newbie: I am creating a lot of simple
pivot-charts from my raw data using the reshape-package. In these charts
we have medical doctors judging videos in the columns and the videos
they judge in the rows. Simple example of chart/data.frame input with
two
of S Poetry and A Guide for the Unwilling S User)
drflxms wrote:
Dear R-colleagues,
another question from a newbie: I am creating a lot of simple
pivot-charts from my raw data using the reshape-package. In these charts
we have medical doctors judging videos in the columns and the videos
Hello Chibisi,
I am not shore whether I completely understand your needs: Do you want
to build a webpage which relies on a content management system (cms)? Do
you want to collect data (i.e. survey) which later on shall be analysed
using R? Or shall it be a webpage with an interactive R GUI? What
that is the way it would be done), before it gets
displayed on the web page.
Kind Regards
Chibisi
On Wed, Sep 3, 2008 at 11:39 AM, drflxms [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
Hello Chibisi,
I am not shore whether I completely understand your needs: Do you want
hope it helps.
Best,
Dimitris
Quoting drflxms [EMAIL PROTECTED]:
Dear R-colleagues,
this is a question from a R-newbie medical doctor:
I am evaluating data on inter-observer-reliability in endoscopy. 20
medical doctors judged 42 videos filling out a multiple choice survey
for each
Dear R-colleagues,
this is a question from a R-newbie medical doctor:
I am evaluating data on inter-observer-reliability in endoscopy. 20
medical doctors judged 42 videos filling out a multiple choice survey
for each video. The overall-data is organized in a classical way:
observations (items
Hi Christoph,
perfect! Your code worked out of the box (copy and paste ;-). I had
expected at least some lines of code, but this is really easy!
So once you get used to command line, this is much more flexible (and
comfortable!) than all these coloured windows. Can't tell you how happy
I am,
Hello all,
beside saying again thank you for your help, I'd like to present the
final solution of my problem and the results of the kappa-calculation:
election.2005 - c(16194,13136,3494,3838,4648,4118)
#data obtained via genesis-database of Statistisches Bundesamt
www.destatis.de
#simply cut of
: Friday, August 22, 2008 12:41 PM
To: drflxms; r-help@r-project.org
Subject: Re: [R] simple generation of artificial data with
defined features
I don't think that the election data is the right data to
demonstrate Kappa, you need subjects that are classified by 2
or more different raters
-Sarnowski
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of drflxms
Sent: Friday, August 22, 2008 6:12 AM
To: r-help@r-project.org
Subject: [R] simple generation of artificial data with
defined features
Dear R-colleagues,
I am quite a newbie to R
Dear R-colleagues,
I am quite a newbie to R fighting my stupidity to solve a probably quite
simple problem of generating artificial data with defined features.
I am conducting a study of inter-observer-agreement in
child-bronchoscopy. One of the most important measures is Kappa
according to
36 matches
Mail list logo
