Displaying 20 results from an estimated 1000 matches similar to: "Cohen's kappa, unequal score ranges"
2009 Jul 07
1
ReShape to create Time from Observations?
Here is a couple of very simple data.frames:
X<-data.frame(A=1:10, B=0, C=1, Ob1=1:10, Ob2=2:11, Ob3=3:12,
Ob4=4:13, Ob5=3:12, Ob6=2:11)
Y<-data.frame(A=1:20, B=0, C=1, D=5, Ob1=1:10, Ob2=2:11, Ob3=3:12,
Ob4=4:13, Ob5=3:12, Ob6=2:11, Ob7=5:9)
Z<-data.frame(A=1:30, B=0, C=1, D=6, E=1:2, Ob1=1:10, Ob2=2:11,
Ob3=3:12, Ob4=4:13, Ob5=3:12, Ob6=2:11, Ob7=1:10, Ob8=3:12)
Each row in the
2006 Apr 28
1
Where do I find Cohen´s kappa???
Hello,
I?m looking for a way to measure the goodness of fit of my model with Cohen?s Kappa (scaling between 0 and 1).
The kappa function does not give the results I?m looking for. Heres the code:
z<-glm(x~y,binomial)
kappa(z, exact = T)
Does anyone know more?
many thanks
Christian
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2008 Sep 09
1
write dataframes
Hi,
After manipulate my data I have ended up with 5 different data frames
with different number of observations but the same
number of variables (columns)
An example, if I write str(object1), I see this,
data.frame': 47 obs. of 3 variables:
$ ORF : Factor w/ 245 levels "YAL038W","YAL054C",..: 10 19 38 39 44
45 50 51 59 60 ...
$ mRNA : num 0.891 1.148 1.202
2006 Oct 02
2
R function to compute kappa statistics for two vector
Dear R-user,
Did anybody know how to calculate the kappa statistics of two vectors for
the agreement? for example:
a<-c(0,1,0,0,1,0)
b<-c(0,1,1,0,0,1)
I know the percent of agreement is 3/6, but how to get the kappa?
[[alternative HTML version deleted]]
2007 Mar 27
1
basic handling of data.frame
Hello,
I'm new to R but wan't to use it to compute the statistics of my medical study.
The study includes several parameters for a number of patients. Each
parameter was assessed by a number of readers, once with a special
condition, once without.
Now I have a data.frame with colums like:
PatientID, ReaderID, SpecialCond(yes/no), Parameter1, Parameter2.....
the rows are not sorted, and
2007 Mar 22
3
Cohen's Kappa
Hi,
im little bit confused about Cohen's Kappa and i should be look into the
Kappa function code. Is the easy formula really wrong?
kappa=agreement-chance/(1-chance)
many thanks
christian
###############################################################################
true-negativ:7445
false-positive:3410
false-negativ:347
true-positiv:772
classification-aggrement:68,6%
2008 Sep 07
1
cohen's kappa
Dear all,
I have a question on Cohen's kappa:
Assume I have two datasets, one has 500 objects, 10 methods and the other,
1000 different objects, 20 different methods. Could I compare between the
two datasets to conclude the 10 methods are more "concordant" than the 20
ones by looking at some output, for example, cohen.kappa{concord} ?
One more, could anyone explain in brief,
2010 May 25
1
Cohen's Kappa for beginners
Hi,
I've got two vectors with ratings from two coders, like this:
x<-c("red", "yellow", "blue", "red") #coder number 1
y<-c("red", "blue", "blue", "red") #coder number 2
I want to find Cohen's Kappa using the wkappa function in the psych
package. The only example in the docs is using a matrix, which
2010 Aug 03
2
multiple R sessions from one working directory using GNU screen
Dear all,
I am using GNU screen to run multiple R sessions from one working
directory in order to split task, however I noticed that dataset is not
synchronized e.g. if I have two sessions R1 and R2, and I remove an
object from R1, R2 doesn't change as expected or change at random.
I have tried to save.image(), q() and then restart both sessions, but it
does not help.
Any suggestions?
2016 Apr 28
0
Snowfall - Error in checkForRemoteErrors(val) with sfClusterApplyLB()
Hello,
I'm trying to run a code that uses the snowfall package. Here is the structure of my code.
sfInit(parallel=T, cpus = 5, slaveOutfile="ErrorMessage.txt")
sfExportAll()
sfLibrary(rgdal)
sfLibrary(raster)
sfLibrary(sp)
sfLibrary(rgeos)
sfLibrary(snowfall)
system.time( sfClusterApplyLB(1:10, function(k) {
sfCat(paste("Iteration ", k),
2014 Oct 23
2
[LLVMdev] compiler-rt with MSVC 2013
compiler-rt libs must be built with /MT, so the MSVS build is doing
the wrong thing here.
2014-10-23 12:52 GMT-07:00 Aaron Ballman <aaron at aaronballman.com>:
> On Thu, Oct 23, 2014 at 3:42 PM, Aaron Ballman <aaron at aaronballman.com> wrote:
>> On Thu, Oct 23, 2014 at 3:38 PM, Aaron Ballman <aaron at aaronballman.com> wrote:
>>> On Thu, Oct 23, 2014 at 2:57
2006 Dec 11
1
cohen kappa for two-way table
Greetings,
I am a bit confused by the results returned by the functions:
cohen.kappa {concord}
classAgreement {e1071}
when using a two-way table.
for example, if I have an matrix A, and a similar matrix B (same
dimensions), then:
matrix A and B can be found:
http://casoilresource.lawr.ucdavis.edu/drupal/files/a_40.txt
http://casoilresource.lawr.ucdavis.edu/drupal/files/b_40.txt
A <-
2006 Aug 10
1
logistic discrimination: which chance performance??
Hello,
I am using logistic discriminant analysis to check whether a known
classification Yobs can be predicted by few continuous variables X.
What I do is to predict class probabilities with multinom() in nnet(),
obtaining a predicted classification Ypred and then compute the percentage
P(obs) of objects classified the same in Yobs and Ypred.
My problem now is to figure out whether P(obs) is
2014 Oct 23
2
[LLVMdev] compiler-rt with MSVC 2013
On Thu, Oct 23, 2014 at 3:38 PM, Aaron Ballman <aaron at aaronballman.com> wrote:
> On Thu, Oct 23, 2014 at 2:57 PM, Aaron Ballman <aaron at aaronballman.com> wrote:
>> On Thu, Oct 23, 2014 at 2:46 PM, Timur Iskhodzhanov <timurrrr at google.com> wrote:
>>> 2014-10-23 11:34 GMT-07:00 Aaron Ballman <aaron at aaronballman.com>:
>>>> On Thu, Oct
2019 Feb 25
2
Making LLD PDB generation faster
That's good news. For having debug info, you could try adding /Z7 on the cmake cmd-line, such as -DCMAKE_CXX_FLAGS="/Z7". Or use the 'RelWithDebInfo' target instead of 'Release' and add -DCMAKE_CXX_FLAGS="/Ob2" (because that target uses /Ob1 as a default).
Can you please send a patch on Phabricator if you fix the LLVM_ENABLE_PDB issue with Clang? The goal
2019 Feb 25
3
Making LLD PDB generation faster
Can you please try using Ninja instead?
cmake -G Ninja f:/svn/llvm -DCMAKE_BUILD_TYPE=Release -DLLVM_OPTIMIZED_TABLEGEN=true -DLLVM_EXTERNAL_LLD_SOURCE_DIR=f:/svn/lld -DLLVM_TOOL_LLD_BUILD=true -DLLVM_ENABLE_LLD=true -DCMAKE_C_COMPILER="C:/Program Files/LLVM/bin/clang-cl.exe" -DCMAKE_CXX_COMPILER="C:/Program Files/LLVM/bin/clang-cl.exe" -DCMAKE_LINKER="C:/Program
2002 Oct 17
1
manova with Error?
Let's say I have a within-subject experiment with 2 observables, obs1 and ob2 and 2 independent factors, fac1 and fac2.
I can do
summary( aov( obs1~fac1*fac2 + Error(Subject/(fac1*fac2)) ) )
summary( aov( obs2~fac1*fac2 + Error(Subject/(fac1*fac2)) ) )
to test the 2 observables separately.
> summary( fit<-manova( cbind(obs1,obs2)~fac1*fac2 + Error(Subject/(fac1*fac2)) ) )
gives
2011 Jul 27
1
Converting F-value from ANOVA to cohen's d in meta-analysis (metafor-package)
Dear R-experts!
Running a meta-analysis (using the magnificent metafor-package), I use
cohen's d as a main outcome measure in a random-effects model.
For most of the samples cohen's d is derived form a comparison of two groups
(A & B). However some studies report results from an ANOVA (one-factor with
three levels: C,D,E) whereas two groups (C,D) correspond to one group in the
other
2019 Feb 25
2
Making LLD PDB generation faster
I think its a huge bug that it doesn't raise any errors or warnings
about it. But I will open a ticket on cmake, they should be using
clang-cl.exe and lld-link.exe if T="llvm" probably set host to 64 bit
as well.
On Mon, Feb 25, 2019 at 3:34 PM Zachary Turner <zturner at google.com> wrote:
>
> I don’t think changing the compiler or linker is supported with the vs
2019 Feb 25
5
Making LLD PDB generation faster
Times for lld compiled with LTO:
Input File Reading: 1430 ms ( 3.3%)
Code Layout: 486 ms ( 1.1%)
PDB Emission (Cumulative): 41042 ms ( 94.6%)
Add Objects: 33117 ms ( 76.4%)
Type Merging: 25861 ms ( 59.6%)
Symbol Merging: 7011 ms ( 16.2%)
TPI Stream Layout: 996 ms ( 2.3%)
Globals Stream Layout: