Displaying 20 results from an estimated 10000 matches similar to: "how to fit y=m*x"
2007 Sep 06
2
bridge on DIVA card and how to see it
In the capi.conf file, there is a bridge option that allow to "native
bridging (CAPI line interconnect) if available", and I found this in the
capi-user mailing list :
--------------------------------
I suggest you put bridge=yes into each interface.
Then, when Asterisk bridges two channels, it looks for
the possibility to do a native bridge (call the bridge code of
the channel
2010 Sep 27
1
Fitting with error on data
As this forum proved to be very helpful, I got another question...
I'd like to fit data points on which I have an error, dx and dy, on each x
and y. What would be the common procedure to fit this data by a linear model
taking into account uncertainty on each point? Would weighting each point by
1/sqrt(dx2+dy2) (and taking dx and dy as relative errors) in a lm() fit do
the job? I would like to
2012 Jul 03
2
EM algorithm to find MLE of coeff in mixed effects model
I have a general question about coefficients estimation of the mixed model.
I simulated a very basic model: Y|b=X*\beta+Z*b +\sigma^2* diag(ni);
b follows
N(0,\psi) #i.e. bivariate normal
where b is the latent variable, Z and X are ni*2 design matrices, sigma is
the error variance,
Y are longitudinal data, i.e. there are ni
2017 Jun 14
3
about fitting a regression line
Hi R users,
I have some data points (Xi, Yi), and they may follow such a pattern Yi =
cCOS(Xi) + d, how to find the c and d in R? which function to use? Also,
how to get the R2 and p value for this correlation? Thanks for any kind of
help.
[[alternative HTML version deleted]]
2007 Sep 12
2
Problems with Asterisk behind a firewall
Hi all,
I have set up Asterisk and I am able to register with my SIP provider and receive calls.
When I try to register with Asterisk from outside I can place calls but tthe other person can't hear me.
Have opened port 5060 UDP as well as port 10000 to 20000 UDP. Any ideas?
Thanks,
Christian
2013 May 16
2
R looping help
Hey I'm not really sure what I should put on here, but I am having trouble
with my R code. I am trying to get the p-values, R^2s etc for a number of
different groups of variables that are all in one dataset.
This is the code:
#Stand counter
st<-1
#Collections
stands<-numeric(67)
slopes<-numeric(67)
intercepts<-numeric(67)
mses<-numeric(67)
rsquares<-numeric(67)
2014 Dec 19
2
[PATCH v1] cover: armv7: celt_pitch_xcorr: Introduce ARM neon intrinsics
Hi,
Optimizes celt_pitch_xcorr for ARM NEON floating point.
Changes from RFCv3:
- celt_neon_intr.c
- removed warnings due to not having constant pointers
- Put simpler loop to take care of corner cases. Unrolling using
intrinsics was not really mapping well to what was done
in celt_pitch_xcorr_arm.s
- Makefile.am
Removed explicit -O3 optimization
- test_unit_mathops.c,
2006 Mar 01
1
a strange problem with integrate()
Dear all,
I am stuck on the following problem with integrate(). I have been out of
luck using RSiteSearch()..
My function is
g2<-function(b,theta,xi,yi,sigma2){
xi<-cbind(1,xi)
eta<-drop(xi%*%theta)
num<-exp((eta + rep(b,length(eta)))*yi)
den<- 1 + exp(eta + rep(b,length(eta)))
result=(num/den)*exp((-b^2)/sigma2)/sqrt(2*pi*sigma2)
2014 Dec 10
2
[RFC PATCH v3] cover: armv7: celt_pitch_xcorr: Introduce ARM neon intrinsics
Hi,
Optimizes celt_pitch_xcorr for floating point.
Changes from RFCv2:
- Changes recommended by Timothy for celt_neon_intr.c
everything except, left the unrolled loop still unrolled
- configure.ac
- use AC_LINK_IFELSE instead of AC_COMPILE_IFELSE
- Moved compile flags into Makefile.am
- OPUS_ARM_NEON_INR --> typo --> OPUS_ARM_NEON_INTR
Viswanath Puttagunta (1):
armv7:
2011 Feb 04
3
uniroot
Hi,
I am using the uniroot function in order to carry out a bivariate Monte
Carlo simulation using the logistics model.
I have defined the function as:
BV.FV <- function(x,y,a,A)
(((x^(-a^-1)+y^(-a^-1))^(a-1))*(y^(a-1/a))*(exp(-((1^(-a^-1)+y^(-a^-1))^a)+y^-1)))-A
and the procedure is as follows:
Randomly generate values of A~(0,1), y0 = -(lnA)^-1
Where: A=Pr{X<xi|Y=yi-1} and a is the
2014 Dec 07
3
[RFC PATCH v2] cover: armv7: celt_pitch_xcorr: Introduce ARM neon intrinsics
From: Viswanath Puttagunta <viswanath.puttagunta at linaro.org>
Hi,
Optimizes celt_pitch_xcorr for floating point.
Changes from RFCv1:
- Rebased on top of commit
aad281878: Fix celt_pitch_xcorr_c signature.
which got rid of ugly code around CELT_PITCH_XCORR_IMPL
passing of "arch" parameter.
- Unified with --enable-intrinsics used by x86
- Modified algorithm to be more
2014 Dec 07
2
[RFC PATCH v2] cover: armv7: celt_pitch_xcorr: Introduce ARM neon intrinsics
Hi,
Optimizes celt_pitch_xcorr for floating point.
Changes from RFCv1:
- Rebased on top of commit
aad281878: Fix celt_pitch_xcorr_c signature.
which got rid of ugly code around CELT_PITCH_XCORR_IMPL
passing of "arch" parameter.
- Unified with --enable-intrinsics used by x86
- Modified algorithm to be more in-line with algorithm in
celt_pitch_xcorr_arm.s
Viswanath Puttagunta
2011 Jan 27
1
Minor typo in influence.measures.Rd ?
Dear list,
There is, I believe, a minor typo in the example section of
influence.measures.Rd. In the final example the word `does` appears
where I suspect `dose` is required:
I couldn't remember exactly what format patches should be in, so here is
one as diff would produce:
Index: devel/src/library/stats/man/influence.measures.Rd
2010 Mar 04
2
which coefficients for a gam(mgcv) model equation?
Dear users,
I am trying to show the equation (including coefficients from the model
estimates) for a gam model but do not understand how to.
Slide 7 from one of the authors presentations (gam-theory.pdf URL:
http://people.bath.ac.uk/sw283/mgcv/) shows a general equation
log{E(yi )} = ?+ ?xi + f (zi ) .
What I would like to do is put my model coefficients and present the
equation used. I am an
2017 Jun 14
0
about fitting a regression line
Start with the lm() function; i.e., see
?lm
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
On 6/14/17, 3:40 PM, "R-help on behalf of lily li" <r-help-bounces at r-project.org on behalf of chocold12 at gmail.com> wrote:
Hi R users,
I have some data points (Xi, Yi), and they may follow such a
2011 Dec 02
1
1.6x speedup for requal() function (in R/src/main/unique.c)
Hi,
FWIW:
/* Taken from R/src/main/unique.c */
static int requal(SEXP x, int i, SEXP y, int j)
{
if (i < 0 || j < 0) return 0;
if (!ISNAN(REAL(x)[i]) && !ISNAN(REAL(y)[j]))
return (REAL(x)[i] == REAL(y)[j]);
else if (R_IsNA(REAL(x)[i]) && R_IsNA(REAL(y)[j])) return 1;
else if (R_IsNaN(REAL(x)[i]) && R_IsNaN(REAL(y)[j])) return 1;
2009 Oct 27
1
Poisson dpois value is too small for double precision thus corrupts loglikelihood
Hi - I have a likelihood function that involves sums of two possions:
L = a*dpois(Xi,theta1)*dpois(Yi,theta2)+b*(1-c)*a*dpois(Xi,theta1+theta3)*dpois(Yi,theta2)
where a,b,c,theta1,theta2,theta3 are parameters to be estimated.
(Xi,Yi) are observations. However, Xi and Yi are usually big (>
20000). This causes dpois to returns 0 depending on values of theta1,
theta2 and theta3.
My first
2010 Apr 27
1
TikzDevice and texi2dvi
Dear All,
I am starting to use the tikzDevice package, but I am experiencing some
(minor problems).
If I try to run the script at the end of the email, I get the following
error
Error in tools::texi2dvi("normal.tex", pdf = T) :
Running 'texi2dvi' on 'normal.tex' failed.
Messages:
sh: /usr/bin/texi2dvi: not found
How do I install the missing texi2dvi?
I found some
2005 Aug 23
6
priority of operators in the FOR ( ) statement
Dear All,
I spent an entire evening in debugging a small, fairly simple program in R
- without success. It was my Guru in Bayesian Analysis, Thomas Fridtjof,
who was able to diagonose the problem. He said that it took a long time
for him also to locate the problem.
This program illustrates in some ways the shortcomings of the error
messages that R responds with. In this case, it was quite
2008 Jul 23
3
Constrained coefficients in lm (correction)
Dear list,
In my previous email, the model I'd like to estimate is
rea=a*st+b*mod+error, where a+b=1 and a,b>0. My apologies for the
misunderstanding.
Thanks for all your help,
Jorge
On Wed, Jul 23, 2008 at 3:35 PM, Jorge Ivan Velez <jorgeivanvelez@gmail.com>
wrote:
>
> Dear list,
>
> I have a data set which looks like myDF (see below) and I'd like to
>