Displaying 20 results from an estimated 500 matches similar to: "Fractional Factorial - Wrong values using lm-function"
2018 Apr 27
1
Introducing HardCloud @ FCCM 2018
Hi,
HardCloud (www.hardcloud.org) is an extension to the OpenMP 4.X standard
that seeks to ease the task of offloading IP-cores to FPGA accelerators in
CPU-FPGA architectures. This is achieved by two new clauses [use] and
[module] shown in the example below:
#pragma omp target device(HARP | HARPSIM | Catapult) map(to: X) map(from: Y)
#pragma omp parallel for use(hrw) module(loopback) check
2006 Aug 24
1
how to constrast with factorial experiment
Hello, R users,
I have two factors (treat, section) anova design experiment where
there are 3 replicates. The objective of the experiment is to test if
there is significant difference of yield between top (section 9 to 11)
and bottom (section 9 to 11) of the fruit tree under treatment. I
found that there are interaction between two factors. I wonder if I
can contrast means from levels of
2008 Jan 08
1
using lapply()
useR's,
I am trying to find a quick way to change some values in a list that are
subject to a condition to be NA. Consider the 3x1 matrix:
delta <- matrix(c(2.5,2.5,1), nrow = 1)
And consider the list named v that has 3 elements
> v
v[[1]]
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12]
[,13] [,14]
[1,] 4.25 3.25 2.25 1.25 0.25 0.75 1.75 2.75 3.75 4.25
2010 Oct 14
7
undefined method?
I''m trying to learn rails as I go along, and having a bit of trouble.
There is an undefined method cropping that I don''t know why rails
thinks should be there.
Firstly, I''m using rails 3, ruby 1.9.2
I have a controller with an index action This part works fine, but i
am trying to add a comment form to the page that is rendered by that
index action.
Supposing my
2012 Feb 02
9
Modelo senoidal de datos temporales de radiación y prueba de Thom
Hola a todos:
Estoy intentado realizar un modelo senoidal de unos datos de radiación
solar con el fin de afrontar el relleno de la serie y aplicar la prueba
de Thom para verificar su homogeneidad [0].
De momento me encuentro con los siguientes problemas:
1- ¿Existe la prueba de Thom en R? ¿O debo crearme mi propia función?
2- Para la realización del modelo senoidal estoy siguiendo los pasos
2008 Oct 03
1
NA's in segmented
I am trying to fit a very simple broken stick model using the package
"segmented" but I have hit a roadblock.
> str(data)
'data.frame': 18 obs. of 2 variables:
$ Bin : num 0.25 0.75 1.25 1.75 2.25 2.75 3.25 3.75 4.25 4.75 ...
$ LnFREQ: num 5.06 4.23 3.50 3.47 2.83 ...
I fit the lm easily:
> fit.lm<-lm(LnFREQ~Bin, data=id07)
But I keep getting an error
2003 Dec 01
0
No subject
Want to hold up a bank in Latin?
"Catapultam habeo. Nisi pecuniam omnem mihi dabis, ad caput tuum saxum
immane mittam."
(I have a catapult. Give me all the money, or I will fling an enormous rock
at your head.)
"Lawyers are like chemical weapons. Everybody gets screwed if they're let
out."
2005 Feb 07
3
syslinux/isolinux capabilities
I'm wondering if it's possible to use isolinux on a bootable CDR to boot an
ISO9660 disk image off of the CDR's filesystem. I'm trying to make a multi-boot
CD which is capable of booting both floppy images and smaller ISO9660 images
(such as the debian netinst or DSL - damnsmall linux), and I am wondering if
isolinux is capable of doing this (or something similar to this -
2008 Jun 15
1
Help finding the mode and maximum for a specified 'window' of time series data
I am relatively new to R, so apologize up front for my long question,
particularly if there is too much or too little information.
I have a large time series data set where each subject's behavior was
originally coded on .25s intervals for 3min task. I am trying to determine
if the findings are different depending on the coding interval (i.e. Compare
.25s to 1s to 5s to 10s).
I also need to
2009 May 20
1
stationarity tests
How can I make sure the residual signal, after subtracting the trend extracted through some technique, is actually trend-free ?
I would greatly appreciate any suggestion about some Stationarity tests.
I'd like to make sure I have got the difference between ACF and PACF right.
In the following I am citing some definitions. I would appreciate your thoughts.
ACF(k) estimates the correlation
2020 Nov 03
2
Group with RWX acl cannot delete as file/dir owned by user with RWX
Thank you for any help with this:
Using xattr so that I can manage a domain joined Samba server share
with AD permissions. The underlying OS file perms are 777 and I have
set the share with -R a+w to make sure that permissions for owner and
group are the same. Getfacl returns:
# file: deleteme.txt
# owner: root
# group: group_access
user::rwx
group::rwx
group:group_access:rwx
mask::rwx
2006 Nov 17
2
effects in ANCOVA
Dear R users,
I am trying to fit the following ANCOVA model in R2.4.0
Y_ij=mu+alpha_i+beta*(X_ij-X..)+epsilon_ij
Particularly I am interested in obtaining estimates for mu, and the effects
alpha_i
I have this data (from the book Applied Linear Statistical Models by Neter
et al (1996), page 1020)
y<-c(38,43,24,39,38,32,36,38,31,45,27,21,33,34,28)
2012 Mar 28
1
CI with confint
Hello all,
I'm trying to use confint from the MASS package to compute confidence
intervals for an nls object. When I plot the results, however, they don't
make sense - lines cross over the fitted model or just don't match the
data. Code is :
Thanks for help
dat<-data.frame(a,b)
with(dat, plot(a,b))
model<-(nls(b~(1/exp(a*x))*n, data=dat, start=list(x=.001,n=20),
2006 Aug 11
1
x tick labels - sparse?
Hi,
I'm stuck on creating a plot with x tick labels for every Nth tick
mark - how is that done? I don't see a simple solution to this in
help(plot) or help(par) and what I've tried is not working, eg, the
following does not work, although it seems intuitive to me that it
should work:
x <- seq(-100,1000,25)
y <- x * x
% find all the x values that are multiples of 100
tmp <-
2009 Aug 13
1
R code to reproduce (while studying) Bates & Watts 1988
Hi R users,
I'm here trying to understand correlated residuals in nonlinear estimation.
I'm reading/studying the book Bates, D. M. and D. G. Watts, (1988),
/Nonlinear regression analysis and its applications/, Wiley, NY. pages
92-94, trying to reproduce the figures and to find out the code in R to
perform the necessary calculations.
I also consulted Pinheiro and Bates, but without
2017 Oct 05
4
dealing with a messy dataset
dear R-users,
I am facing a quite regular and basic problem when it comes to dealing
with datasets, but I cannot find any satisfying answer so far.
I have a messy dataset of galaxies like that :
And XVIII 000214.5+450520 0.69 17 9 0.00 -8.7 26.8 6.44
6.78 < 6.65 -44 0.5 MESSIER031 0.6 1.54
PAndAS-03 000356.4+405319 0.10 17 0.00 -3.6 27.8
4.38
2008 Mar 20
3
Break up a data frame
Hi R users,
I have a dataframe in the below format
xyz 01/03/2007 15.25 USD
xyz 01/04/2007 15.32 USD
xyz 01/02/2008 23.22 USD
abc 01/03/2007 45.2 EUR
abc 01/04/2007 45.00 EUR
2006 Aug 29
0
how to contrast with factorial experiment
Hello, R experts,
If I understand Ted's anwser correctly, then I can not contrast the
mean yields between sections 1-8 and 9-11 under "Trt" but I can
contrast mean yields for sections 1-3 and 6-11 because there exists
significant interaction between two factors (Trt:section4,
Trt:section5). Could I use the commands below to test
the difference between sections 1-3 and 6-11 ?
2003 Dec 11
4
Probelm with read.table
Hi All,
I have the following text file (mytextfile.txt)
738307 527178 714456 557955
#N/A 17.42 6.22 4.73
#N/A 17.3 6.23 4.75
#N/A 17.29 6.17 4.7
#N/A 17.07 6.12 4.6
#N/A 17.27 6.19 4.7
#N/A 17.72 6.4 4.78
#N/A 17.12 6.19 4.75
#N/A 17.07 6.15 4.65
#N/A 17.03 6.07 4.64
#N/A 17.38 6.13 4.7
#N/A 17.38 6.13 4.7
#N/A 17.38 6.13 4.7
#N/A 17.38 6.13 4.7
#N/A
2004 Feb 06
3
quantile function
I am trying to `cut' a continuous variable into contiguous classes
containing approximately an equal number of observations. I thought
quantile() was the appropriate function to use in order to find the
breakpoints, but I end up with classes of different sizes - see
example below. Does anybody have an explanation for that? And what is
the `recommended' way of computing what I am looking