Displaying 20 results from an estimated 1000 matches similar to: "proportional chance criteria"
2009 Jan 31
1
thurston case 5
Hi, I hope some one can help. I need to compute Thurston's case 5 on a large
set of data. I have gotten as far as computing the proportional preference
matrix but the next math is beyond me.
Here us my matrix
0.500 0.472 0.486 0.587 0.366 0.483 0.496 0.434
0.528 0.500 0.708 0.578 0.633 0.554 0.395 0.620
0.514 0.292 0.500 0.370 0.557 0.580 0.615 0.329
0.413 0.422 0.630 0.500 0.783 0.641 0.731
2004 Aug 13
3
Tutorials on R
Hi !!
Is there a good tutorial for the R language ? I really find it hard to
find methods in R.
Thanks and Cheers ../Murli
2004 Nov 04
2
biplot drawing conc ellipses
Is there an option to draw concentration ellipses in biplots ? It seems
really nice to summarize large number of points of each group.
Cheers../ Murli
2007 Oct 04
5
combining vectors on unequal length
If I have two vectors
X<-1:10
Y<-1:5
When I combine them using cbind, the shorter one is repeated and both are made of the same length. Is there a methods that does this without duplicating the shorter one. I want to use this to store the data back to a file.
Thanks ../Murli
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2009 May 06
1
Kerberos and 2008 AD troubles
I've been trying to get Kerberos to work for the last couple of days so
that we can use SSO. I can't seem to get past a roadblock and Google
doesn't seem to provide any answers. I've got Samba connected to the AD
and running. I can wbinfo everything and can login to the machine using
PAM with the pam_winbind modules just fine. I can get user tickets just
fine. When I try to get ssh
2007 Jun 26
3
inter-rater agreement index kappa
Is there a function that calculates the inter-rater agreement index
(kappa) in R?
Thanks ../Murli
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2007 Aug 01
5
t-distribution
If I have a calculated t can I get the probability associated with it
using an R function by giving it the df and t? I know I can do the whole
calculation using t.test() or get the t-distribution using qt(). If
t=1.11 and df =9 can I get the probability?
Thanks../Murli
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2009 Jul 14
4
Trig functions strange results
I am trying to calculate coordinate transformations and in the process of debugging my code using debug I found the following
Browse[1]> direction[i]
[1] -1.570796
Browse[1]> cos(direction[i])
[1] 6.123032e-17
Browse[1]> cos(-1.570796)
[1] 3.267949e-07
Browse[1]> direction[i]
[1] -1.570796
Browse[1]> cos(direction[i])
[1] 6.123032e-17
Browse[1]> cos(-1.570796)
[1] 3.267949e-07
2006 Sep 06
2
biplot label size
Which is the parameter that is used to decrease the size of ylabs
plotted in biplot? I tried playing with cex and cex.lab I am not getting
it right
pc <- princomp(USArrests)
biplot(pc, xlabs = rep("", nrow(USArrests)),ylabs=(colnames(USArrests)))
Thanks../Murli
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2007 Mar 18
1
multcomp
I used the multcomp package sometime back for doing multiple
comparisons. I see that it has been updated and the methods like simint
are no longer supported. When I run the program it prompts to me to use
glht. How do I get the lower and upper conf int and the pValues using
glht? Does anyone have an example?
Thanks ../Murli
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2007 Jul 27
2
manipulating arrays
Can I insert an element in an array at a particular position without
destroying the already existing element?
X<-c(1,2,3,4,5)
I want to insert an element between 1 and 2.
Thanks ../Murli
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2009 Jul 24
2
computing the radius of an arc
Hi!!
I am interesting in computing the radius of an arc that best approximates a curve. Is there an R function that I can use to draw an arc?
Nothing useful came up when I searched help.search. Does anyone have any suggestion to do this?
Thanks ../Murli
2009 May 29
2
strsplit
I am trying split a string and use one part of it to label graphs. I am using strsplit for that. While I am able to split it, how do I access the separated parts.
> filName<-"chrI_2223"
>part<- strsplit(filName,"\\_")
> part
[[1]]
[1] "chrI" "2223"
> part[1]
[[1]]
[1] "chrI" "2223"
I looked up the help archive but did
2005 Feb 10
5
sample
I am trying to sample a subset from a matrix using sample.
The size of the matrix is 20X 1532. It works fine with this,
but when I transpose the matrix and try to sample it, it returns
null.
pick.set<-sample(tissue.exp.t,5,replace=FALSE,prob=NULL)
Is there something that I am missing here ?
Thanks ../Murli
2006 Jul 24
2
running jobs in background
Can I run jobs in the background and the check the status of it from
time to time in Windows version of R?
Thanks ../Murli
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2007 Aug 07
5
small sample techniques
If my sample size is small is there a particular switch option that I need to use with t.test so that it calculates the t ratio correctly?
Here is a dummy example?
รก =0.05
Mean pain reduction for A =27; B =31 and SD are SDA=9 SDB=12
drgA.p<-rnorm(5,27,9);
drgB.p<-rnorm(5,31,12)
t.test(drgA.p,drgB.p) # what do I need to give as additional parameter here?
I can do it manually but
2003 Mar 07
2
Interesting VoIP device
There was some talk a couple of weeks ago about voip devices w/ ethernet
and fxo/fxs configurations. I found this while out and about and
thought it might be interesting.
Configurable fxo/fxs with dual ethernet.
http://www.tekdigitel.com/website/htmlPages/content/products/product_introductions/introduction_to_V-SERVER_iGATE_Dual_Ethernet.htm
--
Karl Putland <karl at
2004 Nov 02
2
lda
Hi !!
I am trying to analyze some of my data using linear discriminant analysis.
I worked out the following example code in Venables and Ripley
It does not seem to be happy with it.
============================
library(MASS)
library(stats)
data(iris3)
ir<-rbind(iris3[,,1],iris3[,,2],iris3[,,3])
ir.species<-factor(c(rep("s",50),rep("c",50),rep("v",50)))
2006 Feb 01
0
Fwd: Feb BYU RUG meeting 1 week notice
The BYU Ruby Users Group will be holding its February meeting
on Wednesday the 8th at 7PM. We''re meeting in room 120 of the
Talmage Math & Computer Building (TMCB) -- see
http://map.byu.edu/Map.html for a map of campus if you need it.
Eric Hodel is making a trip in from Seattle to talk about all
kinds of deep Ruby things. He is a former presenter at RubyConf
(RubyConf 2003
2008 Mar 02
2
listing components of an object
Is there a method to list the components of an object, instead of looking at the help for that method? Let me be more clear with an example
data(iris)
## tune `svm' for classification with RBF-kernel (default in svm),
## using one split for training/validation set
obj <- tune(svm, Species~., data = iris,
ranges = list(gamma = 2^(-1:1), cost = 2^(2:4)),