Displaying 20 results from an estimated 20000 matches similar to: "reference on p.adjust()"
2010 Jan 21
3
Anova unequal variance
I found this paper on ANOVA on unequal error variance. Has this be
incorporated to any R package? Is there any textbook that discuss the
problem of ANOVA on unequal error variance in general?
http://www.jstor.org/stable/2532947?cookieSet=1
2009 Nov 08
2
reference on contr.helmert and typo on its help page.
I'm wondering which textbook discussed the various contrast matrices
mentioned in the help page of 'contr.helmert'. Could somebody let me
know?
BTW, in R version 2.9.1, there is a typo on the help page of
'contr.helmert' ('cont.helmert' should be 'contr.helmert').
2009 Sep 26
1
Looking for a textbook that is more concise than Applied Linear Statistical Models (2004 version)
Hi,
I know this is a little bit offtopic on this list. But I can't find a
more appropriate forum that I can ask. If there is a high quality
forum on statistics textbook discussion, please let me know.
I am reading Applied Linear Statistical Models. One drawback that I
feel about this book is that it discuss many examples, which is to
distracting. Numbers are give in those examples. Comments
2009 Nov 05
4
The equivalence of t.test and the hypothesis testing of one way ANOVA
I read somewhere that t.test is equivalent to a hypothesis testing for
one way ANOVA. But I'm wondering how they are equivalent. In the
following code, the p-value by t.test() is not the same from the value
in the last command. Could somebody let me know where I am wrong?
> set.seed(0)
> N1=10
> N2=10
> x=rnorm(N1)
> y=rnorm(N2)
> t.test(x,y)
Welch Two Sample t-test
data:
2009 Sep 14
3
How to refer to the last a few rows?
Hi,
x=matrix(1:60,nr=6)
I can refer the last 2 rows by
x[5:6,]
If I don't know the total number of rows is 6, is there a way to refer
the last 2 rows?
Regards,
Peng
2009 Oct 17
2
Recommendation on a probability textbook (conditional probability)
I need to refresh my memory on Probability Theory, especially on
conditional probability. In particular, I want to solve the following
two problems. Can somebody point me some good books on Probability
Theory? Thank you!
1. Z=X+Y, where X and Y are independent random variables and their
distributions are known.
Now, I want to compute E(X | Z = z).
2.Suppose that I have $I \times J$ random number
2009 Aug 10
5
Example scripts for R Manual
Hi,
I am wondering if some experienced users would help put the
ready-to-run code of the examples in the manuals. It would help new
users learn R faster by putting all the examples in an ready-to-run R
script file. Can somebody help do so sometime and post the code along
with the pdf manuals?
http://cran.r-project.org/manuals.html
Regards,
Peng
2009 Dec 01
1
How to compute contrast where there are interaction terms in the linear model?
Could somebody recommend some textbook how to compute contrast when
there are interactions terms? "Applied Linear Regression Models"
(book) mentioned contrast, but I cannot extend it to the case where
there are interaction terms.
2010 Feb 03
5
How to export the examples in help(something) to a file?
Some examples in the help page are too long to be copied from screen.
Could somebody let me know some easy way on how to extract the example
to a file so that I can play with them?
2009 Dec 18
4
How to print to file?
I don't find a function to print a string to file. Would somebody let
me know what function I should use?
2009 Feb 05
1
Incorrect p value for binom.test?
I believe the binom.test procedure is producing one tailed p values
rather than the two tailed value implied by the alternative hypothesis
language. A textbook and SAS both show 2*9.94e-07 = 1.988e-06 as the
two tailed value. As does the R summation syntax from R below. It
looks to me like the alternative hypothesis language should be revised
to something like " ... greater than or equal
2009 Oct 14
1
reference on permutation test
I want learn permutation test and resampleing, etc. There are a few
references listed below. I'm wondering what is the best book on this
topic. Can somebody give me some advice. Thank you!
http://en.wikipedia.org/wiki/Resampling_%28statistics%29#Permutation_test
2012 Dec 30
4
[LLVMdev] git repository of the tutorial
Hi,
I'm learning the tutorial.
http://llvm.org/docs/tutorial/
I'm wondering if there is already a git repository of the examples in
the tutorial so that I don't have to copy the code from the webpage.
Thanks!
--
Regards,
Peng
2005 Sep 12
5
remedial stats education
In short:
I didn't take enough stats courses in college. Now I am working on scientific
research and I feel somewhat lost when it comes to designing the statistical
framework. I have looked through the books at:
http://www.r-project.org/doc/bib/R-books.html
I even tried to read [17] Julian J. Faraway. Linear Models with R. This book
is too advanced. It helped a little bit but I still
2009 Nov 08
1
ordered factor and unordered factor
I don't understand under what situation ordered factor rather than
unordered factor should be used. Could somebody give me some examples?
What are the implications of order vs. unordered factors? Could
somebody recommend a textbook to me?
2009 Nov 18
1
Cochran's Theorem
I want to understand ANOVA better. But a few textbook that I have do
not describe Cochran's Theorem in details. Could somebody recommend a
book for me?
2004 Aug 17
1
survdiff
Hello,
As I am quitte an ignorant user of R, excuse me for any wrongfull usage of
all the terms.
My question relates to the statistics behind the survdiff function in the
package survival.
My textbook knowledge of the logrank test tells me that if I want to compare
two survival curves, I have to take the sum of the factors: (O-E)^2/E of
both groups, which will give me the Chisq.
If I calculate
2019 Jan 28
2
How to generate .bc file using configure && make on Mac OS X?
>
> but doesn't emit optnone and nounwind attributes
>
s/nounwind/noinline
On Mon, Jan 28, 2019 at 11:35 AM Jakub (Kuba) Kuderski <
kubakuderski at gmail.com> wrote:
> As far as I understand, gllvm doesn't run LTO pipeline or any cross-module
> optimization, and the optimization level provided is only used to compile
> each Translation Unit separately.
> If you
2010 Jan 01
5
How to not to terminate read.table if the input file is empty?
read.table terminates the program if the input file is empty. Is there
way to let the program continue and return me a NULL instead of
terminating the program?
$ Rscript read_empty.R
> read.table("empty_data.txt")
Error in read.table("empty_data.txt") : no lines available in input
Execution halted
$ cat read_empty.R
read.table("empty_data.txt")
$ cat
2009 Sep 17
2
What does model.matrix() return?
Hi,
I don't understand what the meaning of the following lines returned by
model.matrix(). Can somebody help me understand it? What can they be
used for?
attr(,"assign")
[1] 0 1 2 2
attr(,"contrasts")
attr(,"contrasts")$A
[1] "contr.treatment"
attr(,"contrasts")$B
[1] "contr.treatment"
Regards,
Peng
> a=2
> b=3
> n=4