Displaying 20 results from an estimated 700 matches similar to: "Correct statistical inference for linear regression models without intercept in R"
2016 Oct 24
3
typo or stale info in qr man
man for `qr` says that the function uses LINPACK's DQRDC, while it in
fact uses DQRDC2.
```
The QR decomposition of the matrix as computed by LINPACK or LAPACK.
The components in the returned value correspond directly to the values
returned by DQRDC/DGEQP3/ZGEQP3
```
2010 Sep 05
3
simple ts() object question
Dear Community,
say, I have an annual ts() object sampled from 1960 to 1969 like:
ta<-ts(1:10, start=1960, frequency=1)
How can I extract the value from the year 1965?
I mean, not by:
ta[6]
but by something like:
ta[1965]
where I'm directly referring to the year of the observation?
Thank you in advance!
--
View this message in context:
2003 May 12
1
Zeitreihen problem
Hallo!
I lese gro?e Zeitreihen in R ein z.B. mit:
> disc<-read.table("F:/R/DATA/discount_rate_usa.txt")
disc hat dann folgende Struktur:
> disc[1:5]
V1 V2
1 01/03/1955 1.5
2 01/04/1955 1.5
3 01/05/1955 1.5
4 01/06/1955 1.5
5 01/07/1955 1.5
ich will das disc als Zeitreihe erkannt wird und will z.B 01/03/1955 in ein
Datum verwandeln, aber es wird als
2010 Feb 02
0
Recommendations on nonparametric statistical inference textbooks
Could somebody recommend some good nonparametric statistical inference
textbooks for a beginner? And what are pros and cons of each book?
Nonparametric statistical methods by Hollander seems to be more
difficult for a beginner, but is great as a reference, right? Are
there any books that are easier to learn than Hollander's?
Also, I see some books in the wiki page. I don't find the
2012 Jul 26
0
plsdof 0.2-3: Degrees of Freedom and Statistical Inference for Partial Least Squares
Dear R users,
we proudly announce the latest release of our R package plsdof: Degrees
of Freedom and Statistical Inference for Partial Least Squares.
Features include:
* Degrees of Freedom estimates for Partial Least Squares (PLS) Regression
* Model selection for PLS based on various information criteria and on
cross-validation
* approximate confidence intervals and significance tests for PLS
2012 Jul 26
0
plsdof 0.2-3: Degrees of Freedom and Statistical Inference for Partial Least Squares
Dear R users,
we proudly announce the latest release of our R package plsdof: Degrees
of Freedom and Statistical Inference for Partial Least Squares.
Features include:
* Degrees of Freedom estimates for Partial Least Squares (PLS) Regression
* Model selection for PLS based on various information criteria and on
cross-validation
* approximate confidence intervals and significance tests for PLS
2010 Nov 13
2
interpretation of coefficients in survreg AND obtaining the hazard function for an individual given a set of predictors
Dear R help list,
I am modeling some survival data with coxph and survreg (dist='weibull') using
package survival. I have 2 problems:
1) I do not understand how to interpret the regression coefficients in the
survreg output and it is not clear, for me, from ?survreg.objects how to.
Here is an example of the codes that points out my problem:
- data is stc1
- the factor is dichotomous
2012 Mar 26
4
reading header in txt file and making histogram
Dear all
I am a BEGINNER and have R on my Mac. I saved my excel file as .txt file, I
have just one column with first row as the column name. My file when read by
R looks like this. After reading the table I try to make a histogram by
hist(dbh), it says object dbh not found. What am I doing wrong? thanks
dbh
1 11.53
2 16.05
3 7.36
4 16.05
5 8.66
6 12.74
7 22.93
8 7.55
9
2010 Nov 15
1
interpretation of coefficients in survreg AND obtaining the hazard function
1. The weibull is the only distribution that can be written in both a
proportional hazazrds for and an accelerated failure time form. Survreg
uses the latter.
In an ACF model, we model the time to failure. Positive coefficients
are good (longer time to death).
In a PH model, we model the death rate. Positive coefficients are
bad (higher death rate).
You are not the first to be confused
2010 Nov 16
1
Re : interpretation of coefficients in survreg AND obtaining the hazard function for an individual given a set of predictors
Thanks for sharing the questions and responses!
Is it possible to appreciate how much the coefficients matter in one
or the other model?
Say, using Biau's example, using coxph, as.factor(grade2 ==
"high")TRUE gives hazard ratio 1.27 (rounded).
As clinician I can grasp this HR as 27% relative increase. I can
relate with other published results.
With survreg the Weibull model gives a
2005 Nov 29
0
sensitivity tests fo causal inference
Hi all,
Following up on Holger's email last week:
Does anyone know if there exists a library that implements the sensitivity
tests for hidden bias for matched pairs and unmatched groups as proposed in
Rosenbaum's Observational Studies (2002: ch.4)?
Thanks.
Best,
jens
2012 Dec 07
0
Conditional inference forest error: levels in factors do not match
#Conditional inference forest ("Party" package) error message states
that levels in factors of new data do not match original data, but they
do...
#create conditional inference forest
oc_listed.fit1 <- cforest(Listed~
HabMode,controls=cforest_unbiased(ntree=500), data=oc.complete)
#use predict function for subset of data
#this works correctly
2018 Feb 22
0
[WORKSHOP] Computational Aspects of Simulation and Inference for Stochastic Processes and the YUIMA Project
Computational Aspects of Simulation and Inference for Stochastic Processes and the YUIMA Project
This two-day workshop is aimed at presenting the latest results on simulation and inference for stochastic processes and their current and prospect implementation within the YUIMA R package.
Dates:
March 27 (Tue) 9:15-12:15, 14:45-17:45
March 28 (Wed) 9:15-12:15, 14:45-17:45
Location:
2018 Mar 17
1
GSoC 2018 - FUNCTION ATTRIBUTE INFERENCE
Hi Guys!
I'm Praveen Velliengiri, studying third year Msc Data Science at PSG
COLLEGE OF TECHNOLOGY.
I would like to participate in GSoC 2018 under LLVM Organization. I went
through the GSoC Project ideas page and the LLVM mailing list. I really
liked the *FUNCTION ATTRIBUTE INFERENCE *project. I'm starting to make
initial studies for the project. I'm new to LLVM i don't know
2018 Mar 21
1
GSoC 2018 Function Attribute Inference
Hello all !
As you (Nuno Lopes) suggested I went through the basics of interprocedural
analysis. I'm new to LLVM and Compilers in general. I have looked
llvm/lib/Transforms/IPO/FuntionAttrs.cpp and InferFunctionAttrs.cpp. As I'm
new to compiler technology I find difficult to come up with new ideas with
respect to function attributes. I would love to hear any additional
resources like
2007 Apr 24
1
[LLVMdev] Instruction pattern type inference problem
Christopher Lamb wrote:
> A strategy that we have had luck with in the past is the concept of a
> "vector boolean" type, which is the result of a comparison between two
> vectors. It's then necessary to perform a reduction (and, or) on the
> elements in order to produce a scalar boolean value that's suitable for
> a branch. This also allows stuff like letting
2007 Apr 23
1
[LLVMdev] Instruction pattern type inference problem
On Apr 23, 2007, at 5:06 PM, Chris Lattner wrote:
> On Sun, 22 Apr 2007, Christopher Lamb wrote:
>> I have a back end which has both scalar and vector registers that
>> alias each other. I'm having a problem generating the ISel from
>> tablegen that appears only when a vector register class is declared
>> to contain integer vectors. At that moment tablegen
2009 Jun 04
2
[LLVMdev] TableGen Type Inference
Can someone explain why TableGen can't figure this out?
VCVTDQ2PS128rm: (set:isVoid VR128:v4f32:$dst, (sint_to_fp:v4f32
(bitconvert:isInt (ld:v4i32 addr:iPTR:$src)<<P:Predicate_memop>>)))
llvm/tblgen: In VCVTDQ2PS128rm: Could not infer all types in pattern!
The pattern as written looks like this:
[(set VR128:$dst, (v4f32 (sint_to_fp (bc_memopv4i32 addr:$src))))]
I'm
2009 Jun 05
0
[LLVMdev] TableGen Type Inference
How is bc_memopv4i32 defined? The bitconvert in the tablegen
output is marked isInt, which means it's the node that didn't get
inferred.
Dan
On Jun 4, 2009, at 1:06 PM, David Greene wrote:
> Can someone explain why TableGen can't figure this out?
>
> VCVTDQ2PS128rm: (set:isVoid VR128:v4f32:$dst, (sint_to_fp:v4f32
> (bitconvert:isInt (ld:v4i32
2009 Jun 05
1
[LLVMdev] TableGen Type Inference
On Friday 05 June 2009 17:41, Dan Gohman wrote:
> How is bc_memopv4i32 defined? The bitconvert in the tablegen
> output is marked isInt, which means it's the node that didn't get
> inferred.
def bc_memopv4i32 : PatFrag<(ops node:$ptr), (bitconvert
(memopv4i32 node:$ptr))>;
-Dave