Displaying 20 results from an estimated 1000 matches similar to: "Again on Data Mining"
2014 Sep 30
2
[LLVMdev] Behaviour of NVPTX intrinsic
I have written test.ll as below and ran 'opt' on it as
" opt -std-compile-opts test.ll -S -o -" . But the output shows that there
is code motion around the barrier intrinsics.
test.ll
-------
; ModuleID = 'test.bc'
define void @test(i16* %I_0, i16* %I_1, i16* %I_2, i16* %I_3, i16* %O_0) {
entry:
%T_0 = load volatile i16* %I_0
%T_1 = load volatile i16* %I_1
%T_2 =
2009 Oct 01
1
Help for 3D Plotting Data on 'Irregular' Grid
Dear All,
Here is what I am trying to achieve: I would like to plot some data in 3D.
Usually, one has a matrix of the kind
y_1(x_1) , y_1(x_2).....y_1(x_i)
y_2(x_1) , y_2(x_2).....y_2(x_i)
...........................................
y_n(x_1) , y_n(x_2)......y_n(x_i)
where e.g. y_2(x_1) is the value of y at time 2 at point x_1 (see that
the grid in x is the same for the y values at all times).
2008 Aug 04
2
Multivariate Regression with Weights
Hi all,
I'd like to fit a multivariate regression with the variance of the error term porportional to the predictors, like the WLS in the univariate case.
y_1~x_1+x_2
y_2~x_1+x_2
var(y_1)=x_1*sigma_1^2
var(y_2)=x_2*sigma_2^2
cov(y_1,y_2)=sqrt(x_1*x_2)*sigma_12^2
How can I specify this in R? Is there a corresponding function to the univariate specification lm(y~x,weights=x)??
2010 Jan 26
3
Problem with "nls" function
Dear R users,
I have a response variable in a csv file called "y" and a matrix of
predictor variables in a csv file called "mat". I have used the function
"nls" I have specified the nonlinear relation between these variable.The
code I have witten is called Rprog which begins with the phrase:
L.minor.m1<-nls(Y~a ....etc..
The program when I execute the program, I
2014 Feb 08
0
[PATCH v2] arm: Use the UAL syntax for instructions
This is required in order to build using the built-in assembler
in clang.
---
I squashed the two changes since it would break the normal gcc
build otherwise.
---
celt/arm/arm2gnu.pl | 2 ++
celt/arm/celt_pitch_xcorr_arm.s | 18 +++++++++---------
2 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/celt/arm/arm2gnu.pl b/celt/arm/arm2gnu.pl
index eab42ef..5c24758 100755
---
2005 May 18
1
dse VAR models
Hi,
Can anyone tell me how to construct a simple VAR(1) time series with two
variables using the dse package? I would like to end up with two time series
y_1t = \phi_11 y_1,t-1 + \phi_12 y_2,t-1 + e_1t
y_2t = \phi_21 y_1,t-1 + \phi_22 y_2,t-1 + e_2t
Best regards,
Sam.
2006 Dec 14
3
Model formula question
Hi all,
I'm not familiar with R programming and I'm trying to reproduce a
result from a paper.
Basically, I have a dataset which I would like to model in terms of
successive increments, i.e. (y denote empirical values of y)
y_1 = y1,
y_2 = y1 + delta1,
y_3 = y1 + delta1 + delta2.
...
y_m = y1 + sum_2^m delta j
where delta_j donote successive increments in the y-values, i.e.
delta
2017 Dec 11
1
OT -- isotonic regression subject to bound constraints.
Well, I could argue that it's not *completely* OT since my question is
motivated by an enquiry that I received in respect of a CRAN package
"Iso" that I wrote and maintain.
The question is this: Given observations y_1, ..., y_n, what is the
solution to the problem:
minimise \sum_{i=1}^n (y_i - y_i^*)^2
with respect to y_1^*, ..., y_n^* subject to the "isotonic"
2014 Feb 07
3
[PATCH 1/2] arm: Use the UAL syntax for ldr<cc>h instructions
This is required in order to build using the built-in assembler
in clang.
---
celt/arm/celt_pitch_xcorr_arm.s | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/celt/arm/celt_pitch_xcorr_arm.s b/celt/arm/celt_pitch_xcorr_arm.s
index 09917b1..3c4b950 100644
--- a/celt/arm/celt_pitch_xcorr_arm.s
+++ b/celt/arm/celt_pitch_xcorr_arm.s
@@ -309,7 +309,7 @@
2006 Dec 14
0
Model formula
Hi there,
I've sent this e-mail to the list twice but didn't get it back from
the list. Have it reach list members?
cheers,
Ronaldo
---------- Forwarded message ----------
From: Ronaldo Prati <rcprati at gmail.com>
Date: 14/12/2006 11:59
Subject: Model formula question
To: r-help at stat.math.ethz.ch
Hi all,
I'm not familiar with R programming and I'm trying to
2007 Feb 02
1
multinomial logistic regression with equality constraints?
I'm interested in doing multinomial logistic regression with equality
constraints on some of the parameter values. For example, with
categorical outcomes Y_1 (baseline), Y_2, and Y_3, and covariates X_1
and X_2, I might want to impose the equality constraint that
\beta_{2,1} = \beta_{3,2}
that is, that the effect of X_1 on the logit of Y_2 is the same as the
effect of X_2 on the
2012 Sep 20
1
Gummy Variable : Doubt
Hi,
I have a system in which I analyze 2 subjects and 1 variable, so I have
2 models as follow:
y ~ x_1[, 1] + x_2[, 1] + x_1[, 2] + x_2[, 2]
Where
x_1[, i] = cos(2 * pi * t / T_i)
x_2[, i] = sin(2 * pi * t / T_i)
i = 1, 2
Data have two columns: t and y.
As you can see, I have a multiple components model, with rithm and
without trends, and I have a fundamental
2013 Feb 25
3
Empirical Bayes Estimator for Poisson-Gamma Parameters
Dear Sir/Madam,
I apologize for any cross-posting. I got a simple question, which I thought
the R list may help me to find an answer. Suppose we have Y_1, Y_2, ., Y_n ~
Poisson (Lambda_i) and Lambda_i ~Gamma(alpha_i, beta_i). Empirical Bayes
Estimator for hyper-parameters of the gamma distr, i.e. (alpha_t, beta_t)
are needed.
y=c(12,5,17,14)
n=4
What about a Hierarchal B ayes
2008 Aug 13
1
The standard deviation of measurement 1 with respect to measurement 2
Hi,
I have two (different types of) measurements, say X and Y, resulting from
the same set of experiments. So X and Y are paired: (x_1, y_1), (x_2, y_2),
...
I am trying to calculate the standard deviation of Y with respect to X. In
other words, in terms of the scatter plot of X and Y, I would like to divide
it into bins along the X-axis and for each bin calculate the standard
deviation along
2011 Feb 13
1
calculate phase/amplitude of fourier transform function in R
I did a fourier transform on a function in time domain to get the following
functions in frequency domain (in latex):
$Y_1[\omega] = \frac{1}{1-\phi_1 e^{-jw}}$
$Y_2[\omega] = \frac{1}{1-(\phi_1 + \phi_2)e^{-jw} +\phi_1\phi_2e^{-2jw}}$
How do I find the spectrum of this function for given $\phi_1$ and $\phi_2$
coefficients and in the discretization interval $w = [-\pi:.1*\pi: \pi]$?
Then, how
2003 Nov 10
1
ts package function filter: mismatch between function action and help (PR#5017)
Dear people,
I'm running
RedHat 9.0
and
R : Version 1.7.1 (2003-06-16)
from the help file
# Usage:
#
# filter(x, filter, method = c("convolution", "recursive"),
# sides = 2, circular = FALSE, init)
# init: for recursive filters only. Specifies the initial values of
# the time series just prior to the start value, in reverse
# time
2013 Mar 21
0
how to remove changed_attributes from yaml response
Hi,
I am using attr_accessor attributes in model class and assigning the
values to attr_accessor dynamically in controller. And am sending the
data object to display in Yaml format. I am getting the response along
with changed_attributes but I don''t want changed_attributes details in
my response.
build Model code
class Test < ActiveRecord::Base
attr_accessor: t_1, t_2, t_3, t_4
end
2005 Sep 15
1
Coefficients from LM
Hi everyone,
Can anyone tell me if its possibility to extract the coefficients from the
lm() command?
For instance, imagine that we have the following data set (the number of
observations for each company is actually larger than the one showed...):
Company Y X1 X2
1 y_1 x1_1 x2_1
1 y_2 x1_2 x2_2
1 y_3 x1_3 x2_3
(...)
2 y_4 x1_4 x2_4
2 y_5 x1_5 x2_5
2 y_6 x1_6 x2_6
(...)
n y_n x1_n x2_n
n
2009 Jan 04
0
Rattle 2.4.0 (Data Mining GUI using R)
Version 2.4.0 of Rattle has been released to CRAN.
The rattle package (http://rattle.togaware.com) is a multi platform
(GNU/Linux, Mac/OSX, MS/Windows) GTK based GUI for data mining (for
exploring data and building descriptive and predictive models). It has
undergone a lot of development over the past year. A companion book
introducing data mining using Rattle is under development, with a
draft
2009 Jan 04
0
Rattle 2.4.0 (Data Mining GUI using R)
Version 2.4.0 of Rattle has been released to CRAN.
The rattle package (http://rattle.togaware.com) is a multi platform
(GNU/Linux, Mac/OSX, MS/Windows) GTK based GUI for data mining (for
exploring data and building descriptive and predictive models). It has
undergone a lot of development over the past year. A companion book
introducing data mining using Rattle is under development, with a
draft