Displaying 20 results from an estimated 29 matches for "tvalues".
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2015 Aug 01
2
[LLVMdev] Strange code generation issue
Hi,
I am using the LLVM release_37 branch and have a strange issue.
Please see the two IR outputs I have saved below:
https://github.com/dibyendumajumdar/ravi/tree/master/ravi-tests/comp_issue
The original.ll is the code I am generating.
The aftercompiling.ll is the output from LLVM with opt level 0.
The issue is that LLVM is deciding to remove the blocks with labels
updatei and updatei.64
2015 Feb 23
2
[LLVMdev] Eliminating redundant loads
On 23 February 2015 at 11:22, David Jones <djones at xtreme-eda.com> wrote:
> You have not installed the DataLayout in the Module, as I had pointed out
> earlier.
>
Hi David,
I reported earlier that I tried this but there was no improvement.
Well I ran another test to be sure. The results are below. As you can
see the loads are still present.
; ModuleID =
2015 Feb 22
2
[LLVMdev] Eliminating redundant loads
Hi,
I am generating following code:
%base = getelementptr inbounds %ravi.CallInfo* %6, i32 0, i32 4, i32 0
%7 = load %ravi.TValue** %base
%8 = bitcast %ravi.TValue* %7 to i8*
%9 = bitcast %ravi.TValue* %5 to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %8, i8* %9, i32 16, i32 8, i1 false)
%10 = load %ravi.CallInfo** %L_ci
%base1 = getelementptr inbounds %ravi.CallInfo* %10, i32 0,
2015 Feb 23
3
[LLVMdev] Eliminating redundant loads
On 23 February 2015 at 01:29, Kamal Sharma <kgs1.rice at gmail.com> wrote:
> Hi Dibyendu,
>
> It would be very helpful if you could post the original source code or
> snippet.
> That way, one can investigate deeper to understand the problem.
>
> Regards,
> Kamal Sharma
>
Hi Kamal,
Sure. I guess I ought to create a test that one can look in isolation.
I am
2015 Feb 23
2
[LLVMdev] Eliminating redundant loads
On 22 February 2015 at 22:54, Hal Finkel <hfinkel at anl.gov> wrote:
>> I tried setting the module's DataLayout to the engine's DataLayout.
>> Don't see any improvement.
>> The memcpy() is to perform a struct assign, so I tried replacing that
>> with member by member store.
>> But even then the loads are not being eliminated so I guess the
>>
2015 Feb 22
2
[LLVMdev] Eliminating redundant loads
On 22 February 2015 at 20:58, David Jones <djones at xtreme-eda.com> wrote:
> Not sure if this is your problem, but it was mine:
>
> You must create (or obtain) a DataLayout *and install it into the Module*.
>
> It is possible to generate machine code for IR and not install the
> DataLayout into the Module. Rather, the DataLayout is used locally at the
> point where code
2008 Jan 19
1
How do we get two-tailed p-values for rlm?
...4.5204 25.8582 22.2181
oatoacData$erp 11.5963 5.3525 2.1665
Residual standard error: 83.29 on 36 degrees of freedom
(2 observations deleted due to missingness)
> i <- length(fitsum$coefficients) - dim(fitsum$coefficients)[1] + 1
> j <- length(fitsum$coefficients)
> tvalues <- fitsum$coefficients[i:j]
> pvalues <- pt(tvalues, df=fitsum$df[2])
> print(rbind(tvalues, pvalues))
[,1] [,2]
tvalues 22.21815 2.1664977
pvalues 1.00000 0.9815145
If I use the lower.tail=FALSE argument to pt, then I seem to get only the
p-values for anything &g...
2009 Mar 08
0
ARIMA second order differencing problem
Hi,
I have been using this site (
http://www.stat.pitt.edu/stoffer/tsa2/Rissues.htm) to help me with some
ARIMA modelling in R.
Unfortunately the methods mentioned do not appear to work with second order
differencing; arima(*, 2, *).
I have used some dummy data to illustrate my point.
When I use the xreg=... method, the estimate of intercept is *way* off. This
can be seen by the high s.e but I
2007 Jun 20
2
Extracting t-tests on coefficients in lm
I am writing a resampling program for multiple regression using lm(). I
resample the data 10,000 times, each time extracting the regression
coefficients. At present I extract the individual regression
coefficients using
brg = lm(Newdv~Teach + Exam + Knowledge + Grade + Enroll)
bcoef[i,] = brg$coef
This works fine.
But now I want to extract the t tests on these coefficients. I cannot
2018 Feb 04
1
Unexpected behaviour from read.table
I?ve been struggling with seemingly ?corrupt? data.frames for a few days, and believe I?ve narrowed the problem down to some odd behaviour from read.table
I receive a tab delimited file from an external provider where strings are encoded as =?content?. Not sure why, perhaps as most users open it in Excel.
My specific issue is that trailing spaces in any of the strings are causing strange results
2007 Jul 17
1
A simple question
Hi all,
I am a newbie of R, and have a very simple question. When I run the
following t test
result = t.test(weight ~ group)
If I want to get the t value, I can do
tvalue = result$statistic
with tvalue being the following:
t
1.191260
However, if I just want the number 1.191260, not the character "t",
how can I achieve that?
Thank you very much,
Gang
2012 May 10
1
Error t value matrix
Hi all,
I want to make the following:
I want to run a linear regression on each column of a matrix "estima" on
the correspondent column on the matrix "estima2".
You see I want to regress estima[,1] on estima2[,1] this way to all
columns....
At the same time I want to make a regression adding each time a new
observation.
You see, the first regression will regress only one
2009 Mar 24
4
multiple paired t-tests
Hi R users,
I have a very large data set that has two conditioning variables for the
test I want to perform.
A toy set can be simulated:
type<-sample(1:3,100,replace=TRUE)
class<-sample(1:20,100,replace=TRUE)
value<-rnorm(100)
data<-cbind(type,class,value)
(though type and class are alphanum)
I want to perform the three pair-wise t-tests between types for each
class in data.
Can
2009 Nov 04
1
vglm(), t values and p values
Hi All,
I'm fitting an proportional odds model using vglm() from VGAM.
My response variable is the severity of diseases, going from 0 to 5 (the
severity is actually an ordered factor).
The independent variables are: 1 genetic marker, time of medical observation,
age, sex. What I *need* is a p-value for the genetic marker. Because I have ~1.5
million markers I'd rather not faffing
2012 Aug 27
2
Assigning colors on low p-values in table
Hi all R-users,
I?m trying to assign colors on those p-value in my table output that fall
above a certain critical value, let?s say a p-value >0.05.
My table looks like this:
Assets ADF-Level P-Value
ADF-First D P-Value ADF-Second D P-Value
[1,] Liabilities -2.3109 0.1988 -3.162
0.025 -6.0281
2013 Oct 18
1
No P.values in polr summary
Hi everyone,
If I compute a "Ordered Logistic or Probit Regression" with the polr
function from MASS package. the summary give me : coefficients, Standard
error and Tvalue.. but not directly the p.value.
I can compute "manualy" the Pvalue, but Is there a way to directly obtain
the pa.value, and I wonder why the p.valeu is not directly calculated, is
there a reason?
exemple
2009 Jan 14
5
How to compute p-Values
Hello.
How can I compute the Bootstrap p-Value for a one- and two sided test, when I have a bootstrap sample of a statistic of 1000 for example?
My hypothesis are for example:
1. Two-Sided: H0: mean=0 vs. H1: mean!=0
2. One Sided: H0: mean>=0 vs. H1: mean<0
I hope you can help me
Thanks in advance
Regards,
Andreas
2004 Oct 27
1
writing lm summary to file?
Hi,
I want to write the summary from a regression. I am doing this because I do not see a way of get the std error, tvalues from the coefficients diagnostic. n$coef does not give this only get the intercept and slope. I tried to use write and write.table and got error in both cases. I jumped thru the hoops below to no avail. Also note, this is in windows. I used to use unix, and do not recall this problem, but only...
2006 Jun 20
2
glm beta hypothesis testing
In summary.glm I'm trying to get a better feel for the z output. The
following lines can be found in the function
1 if (p > 0) {
2 p1 <- 1:p
3 Qr <- object$qr
4 coef.p <- object$coefficients[Qr$pivot[p1]]
5 covmat.unscaled <- chol2inv(Qr$qr[p1, p1, drop = FALSE])
6 dimnames(covmat.unscaled) <- list(names(coef.p), names(coef.p))
2011 Mar 10
1
Help writing a Scheffe Contrast function for R
Hello,
As a new user of R (less than a month) I have got my hands on several books and am pouting through the net looking for help in gaining understanding of this powerful tool. I am becoming more proficient with using basic functions to conduct basic statistics. I am now looking to learn how to write code. After a few small worthless functions I decided to try to create a function that was