Displaying 20 results from an estimated 1000 matches similar to: "Computing inverse cdf (quantile function) from a KDE"
2012 Aug 02
2
ggplot does not show in knitr
Hello,
I'm having some issues getting a ggplot figure to show up in the knitr
output, when placed in a loop.
Specifically, I have a loop inside a knitr chunk :
```{r fitting, warning=FALSE, fig.width=10, fig.height=10, fig.keep='high'}
for (t in 1:T)
{
# do a regression of tgt.vals ~ predictors and compute coeffs and
fitted values (fit.vals / fit.adj.vals)
plot(
2012 Aug 31
1
Histogram to KDE
Hello,
I wanted to know if there was way to convert a histogram of a data-set to a
kernel density estimate directly in R ?
Specifically, I have a histogram [bins, counts] of samples {X1 ...
XN} of a quantized variable X where there is one bin for each level of X,
and I'ld like to directly get a kde estimate of the pdf of X from the
histogram. Therefore, there is no additional quantization of
2003 Apr 03
5
cdf function: inverse to quantile?
Is there a function in R for calculating empirical cumulative distribution
functions, i.e. the inverse of the quantile function? Perhaps in some
library? I''d hate to have to re-invent the wheel.
David Edwards, Biostatistics,
Novo Nordisk A/S, Bagsværd, Denmark.
DEd@novonordisk.com <mailto:DEd@novonordisk.com>
Tlf: +45 44 42 62 35. Fax: +45 44 42 14 80
[[alternate HTML version
2003 May 08
2
approximation of CDF
Hi all,
is there any package in R capable of smooth approximation of CDF
basing on given sample?
(Thus, I am not speaking about ecdf)
In particular, I expect very much that the approximation should
subject to the property:
f(x0)<=f(x1) for x0<x1, where x0 and x1 belong to range of
the sample given.
Polynomial approximation could be OK for me as well.
P.S.
2009 Apr 17
1
Monotone Transformation
Hi, I am trying to use R to mimic what I did in SAS.
proc transreg data=x ;
model identity(GSI)=monotone(group1);
output out=d2 pprefix=M;
run;
Accroding to SAS documentation, the MONOTONE transfomation algorithm comes
from (Kruskal 1964, secondary approach to ties). I have tried ace. it does
provide some kind of monotone transformation, but it is not what I expected.
Here is how
2002 Dec 19
1
newbie question on dist
hi,
i have just begun using R, so please bear with me.
i am trying to use cmdscale and display the result. i read the data
using read.table(), calculate the proximity matrix using dist() and
the display the result using the cmdscale(). this is very fine.
in addition, i want the display to distinguish between two classes
of records in my data. i have my data records marked as "1" or
2010 Jul 26
12
how to generate a random data from a empirical distribition
hi, this is more a statistical question than a R question. but I do want to
know how to implement this in R.
I have 10,000 data points. Is there any way to generate a empirical
probablity distribution from it (the problem is that I do not know what
exactly this distribution follows, normal, beta?). My ultimate goal is to
generate addition 20,000 data point from this empirical distribution created
2004 May 28
2
Simple list manipulation question
I have a list of vectors
$A
"AB" "BC" "CD"
$B
"GF" "HG" "FH" "FJ"
and I want to convert it into a dataframe of form
A AB
A BC
A CD
B GF
B HG
B FH
B FJ
Just can't quite come up with a nice "R" solution for it.
Thanks,
Sean
2009 Mar 19
1
[LLVMdev] sample-code for alias-analysis
Hi,
i need a sample-code, for which the llvm alias-analysis finds a *must-aliases*.
I have tried codes like followings. In all cases, i see just *may-aliases* when i use "opt -aa-eval -print-all-alias-modref-info foo.bc":
Regards
Raad
1 ==========================================
void foo() {
int i = 2;
int& r = i;
}
2 ===========================================
void
2011 Feb 14
3
CDF of Sample Quantile
I need to calculate the probability that a sample quantile will exceed a
threshold given the size of the iid sample and the parameters describing the
distribution of each observation (normal, in my case). I can compute the
probability with brute force simulation: simulate a size N sample, apply R's
quantile() function on it, compare it to the threshold, replicate this MANY
times, and count the
2017 Feb 09
3
Ancient C /Fortran code linpack error
> > On 9 Feb 2017, at 16:00, G?ran Brostr?m <goran.brostrom at umu.se> wrote:
> >
> > In my package 'glmmML' I'm using old C code and linpack in the optimizing procedure. Specifically, one part of the code looks like this:
> >
> > F77_CALL(dpoco)(*hessian, &bdim, &bdim, &rcond, work, info);
> > if (*info == 0){
> >
2010 Nov 02
1
Libvirt and LXC
(oops accidentally sent to -owners)
Hi, i'm trying to start a LXC guest on a F14 computer .. followed the
examples in http://libvirt.org/drvlxc.html, but got stuck when
starting it ..
03:07:23.706: debug : virCgroupNew:542 : New group /
03:07:23.707: debug : lxcControllerRun:563 : Setting up private /dev/pts
03:07:23.711: debug : lxcControllerRun:589 : Mouting 'devpts' on
2003 Dec 15
1
distribution of second order statistic
Hi,
I am getting some weird results here and I think I am missing something.
I am trying to program a function that for a set of random variables
drawn from uniform distributions plots that distribution of the second
order statistic of the ordered variables. (ie I have n uniform
distributions on [0, w_i] for w_i different w_j and i=1..n. I want to
plot the distribution of the second order
2018 Dec 07
3
Implement VLIW Backend on LLVM (Assembler Related Questions)
Hello,
I want to implement LLVM backend for a specific VLIW hardware. I am working
on defining its instruction set, and assembly language.
The hardware has two pipelines, int and float. Each pipeline can do 3
operations/cycle, 3 operations forms an instruction.
One of the Integer Instruction looks like this:
add Ri, Rj, Rk; add Rl, Rm, Rn; add Ro, Rp, Rq
An int instruction and a float
2003 Sep 09
2
Computing a CDF or many quantiles
Given f, a pdf over a finite interval, is there any existing R function that
can efficiently tabulate the cumulative distribution function for f, or
produce all N+1 quantiles of the form i/N? "Efficiently" here means better
than doing repeated integrations for each point.
2017 Feb 10
1
Ancient C /Fortran code linpack error
> On 10 Feb 2017, at 14:53, G?ran Brostr?m <goran.brostrom at umu.se> wrote:
>
> Thanks to all who answered my third question. I learned something, but:
>
> On 2017-02-09 17:44, Martin Maechler wrote:
>>
>>>> On 9 Feb 2017, at 16:00, G?ran Brostr?m <goran.brostrom at umu.se> wrote:
>>>>
>>>> In my package 'glmmML'
2012 Jul 24
4
Integrate(dnorm) with different mean and standard deviation help
I'm trying to provide different parameters to the integrate function for various probability functions. I'm using dnorm as the simplest example here. For instance integrate(dnorm, -1.96, 1.96) produces the correct answer for a normal distribution with mean 0 and standard deviation 1. I've tried two ways to use mean=2.0 and standard deviation 1, but with no luck. The examples follow.
2009 May 30
1
Spatiotemporal correlation function
Hi,
I'm trying to compute the spatiotemporal correlation matrix by using Delta Kronecker products of spatial and temporal correlation matrix in R, but didn't find any delta Kronecker's operator in R. The operators in matrix such as multiplication, addition, eigen values/vector and etc is easily to find and used.
Could someone help me, please?
Cheers.
Firdaus
2016 Jul 15
2
FSD sequence not working on Ubuntu 16.04 LTS
Hi Charles,
On Wednesday, July 13, 2016 11:40:09 PM Charles Lepple wrote:
> On Jul 12, 2016, at 5:27 PM, Ivan Adzhubey <iadzhubey at rics.bwh.harvard.edu>
> wrote:
> > I have recently installed NUT 2.7.3.1 on a freshly installed Ubuntu 16.04
> > LTS (64-bit) system, connected via USB cable to APC Smart-UPS 1500 (SMT
> > model). I am trying to make this configuration
2007 Jul 21
2
X11() dies in remote background
this is not a problem with R but a request for related advice.
i am trying to run a lengthy batch job from my home.
the OS is ...
Linux jedi.bwh.harvard.edu 2.4.22-openmosix1smp #1 SMP Fri Sep 5 01:05:37 CEST
2003 i686 athlon i386 GNU/Linux
i start the job and put it in the background. while i am connected, all is
well. eventually my ISP shuts down the connection if i do not do any
input.