Displaying 20 results from an estimated 700 matches similar to: "Newbie data organisation/structures question..."
2007 May 07
1
TukeyHSD fails on my data
Howdo folks,
So I have my data (attached). There are two columns I'm interested in;
"algname" and "dur". I'd like to know how dur changes with algname.
algname is nominal and there are 7 possibilities. There are two more
nominal independents, "task" and "id", so my model is:
dur ~ algname+task+id
From the research I've done, a TukeyHSD
2009 Aug 19
2
lmer with random slopes for 2 or more first-level factors?
I have data from a design in which items are completely nested within
subjects. Subject is the only second-level factor, but I have
multiple first-level factors (IVs). Say there are 2 such independent
variables that I am interested in. What is the proper syntax to fit a
mixed-effects model with a by-subject random intercept, and by-subject
random slopes for both the 2 IVs?
I can
2009 Feb 10
2
Mixed ANCOVA with between-Ss covariate?
Hi all,
I have data from an experiment with 3 independent variables, 2 are
within and 1 is between. In addition to the dependent variable, I have
a covariate that is a single measure per subject. Below I provide an
example generated data set and my approach to implementing the ANCOVA.
However the output confuses me; why does the covariate only appear in
the first strata? Presumably it should
2011 Feb 03
2
how to read the "Sum Sq" - column from summary.aov()
Dear R-Users,
I have a trivial problem, but extensive googling and ??'ing did not solve it: I want to obtain the sums of squares from a summary.aov() object for later use. Example:
> DV <- rnorm(100)
> IV1 <- as.factor(rep(c("male", "female"), times = 50))
> IV2 <- as.factor(rep(c("young", "old"), times = 50))
>
>
2009 Nov 06
2
Adjusting Yaxis (ylim) limits on a plotMeans(DV, IV1, IV2, error.bars="se")
Hello everyone,
I have tried to look for this everywhere and so far have no luck. I have a
plotMeans(DV, IV1, IV2, error.bars="se") graph that plots my data
(DV-continuous, IVs are factors, IV1 - two levels, IV2-four levels). I am
trying to increase a scale of my y-axis (to be consistent with my other
graphs), but unfortunately nothing works with "plotMeans" function, which
2013 Jun 23
1
2SLS / TSLS / SEM non-linear
Dear all, I try to conduct a SEM / two stage least squares regression with
the following equations:
First: X ~ IV1 + IV2 * Y
Second: Y ~ a + b X
therein, IV1 and IV2 are the two instruments I would like to use. the
structure I would like to maintain as the model is derived from economic
theory. My problem here is that I have trouble solving the equations to get
the reduced form so I can run
2012 May 19
3
anovas ss typeI vs typeIII
Hi all,
I have been struggling with ANOVAs on R. I am new to R, so I created a simple data frame, and I do some analyses on R just to learn R and then check them on SPSS to make sure that I am doing fine. Here is the problem that I've run into:
when we use the aov function, it uses SS Type I as default (on SPSS it is Type III). Then I used the Anova function under cars package using the
2015 Sep 03
2
[RFC] New pass: LoopExitValues
On Wed, Sep 2, 2015 at 5:36 AM, James Molloy <james at jamesmolloy.co.uk> wrote:
> Hi,
>
> Coremark really isn't a good enough test - have you run the LLVM test suite
> with this patch, and what were the performance differences?
For the test suite single source benches, the 235 tests improved
performance, 2 regressed and 705 were unchanged. That seems very
optimistic.
2005 Jul 07
1
multivariate regression using R
Does anyone know if there is a way to run multivariate linear regression
in R? I tried using the lm function (e.g., lm(dv1, dv2~iv1+iv2+iv3),
but got error messages. Is my syntax wrong, or do I need a particular
package?
Thanks,
Jeff--
________________________________________________________
Jeffrey J. Lusk, Ph.D.
Postdoctoral Research Associate
Department of Forestry &
2010 Oct 08
1
MANCOVA
Hi,
I have been using R to do multiple analyses of variance with two
covariates, but recently found that the results in SPSS were very
different. I have check several books and web resources and I think
that both methods are correct, but I am less familiar with R, so I was
hoping someone could offer some suggestions. Oddly simple ANOVA is the
same in SPSS and R. Including covariates improves the
2008 Jun 22
1
two newbie questions
# I've tried to make this easy to paste into R, though it's probably
so simple you won't need to.
# I have some data (there are many more variables, but this is a
reasonable approximation of it)
# here's a fabricated data frame that is similar in form to mine:
my.df <- data.frame(replicate(10, round(rnorm(100, mean=3.5, sd=1))))
var.list <- c("dv1",
2015 Sep 01
2
[RFC] New pass: LoopExitValues
On Mon, Aug 31, 2015 at 5:52 PM, Jake VanAdrighem
<jvanadrighem at gmail.com> wrote:
> Do you have some specific performance measurements?
Averaging 4 runs of 10000 iterations each of Coremark on my X86_64
desktop showed:
-O2 performance: +2.9% faster with the L.E.V. pass
-Os size: 1.5% smaller with the L.E.V. pass
In the case of Coremark, the benefit comes mainly from the matrix
2014 Feb 19
2
[LLVMdev] better code for IV
Hi Andrew,
The issue below refers to LSR, so I'll appreciate your feedback. It also refers to instruction combining and might impact backends other than X86, so if you know of others that might be interested you are more than welcome to add them.
Thanks, Anat
_____________________________________________
From: Shemer, Anat
Sent: Tuesday, February 18, 2014 15:07
To: 'llvmdev at
2005 Apr 29
2
Automating plot labelling in custom function in lapply() ?
Dear List,
Consider the following example:
dat <- data.frame(var1 = rnorm(100), var2 = rnorm(100),
var3 = rnorm(100), var4 = rnorm(100))
oldpar <- par(mfrow = c(2,2), no.readonly = TRUE)
invisible(lapply(dat,
function(x) {
plot(density(x),
main = deparse(substitute(x))) }
)
)
2008 Sep 25
2
levelplot/heatmap question
Hello!
I have data containing a large number of probabilities (about 60) of nonzero
coefficients to predict 10 different independent variables (in 10 different
BMA models). i've arranged these probabilities in a matrix like so:
(IV1) (IV2) (IV3) ...
p(b0) p(b0) p(b0)
p(b1) p(b1) p(b1)
p(b2) p(b2) p(b2)
...
where p(b1) for independent variable 1 is p(b1 !=
2005 Aug 16
4
as.character and a formula
Dear list,
given this formula:
> fmla <- formula(y1 ~ spp1 + spp2 + spp3 + spp5)
> fmla[[3]]
spp1 + spp2 + spp3 + spp5
is this the intended behaviour of as.character:
> as.character(fmla[[3]])
[1] "+" "spp1 + spp2 + spp3" "spp5"
? Where does the extra "+" come from?
> as.character(fmla)
[1] "~"
2001 Jan 31
2
New TransGaming Patch
This worked with:
Wine CVS from Jan 29th + Transgaming patch
XFree 4.0.2
NVidia drivers 0.9.6
Had to turn off DGA, and force wine to manage created windows, otherwise I
get a glXMakeCurrent error when it tries to set the current GLX rendering
context.
The frame rate isn't quite windows, but the demo is certainly playable.
Good luck,
Dan
"Chris Howells"
2001 Feb 08
2
Installling more than one wine version (fwd)
On Thu, 8 Feb 2001, Rick Moulton wrote:
> It seems that Corel Office 2000 for linux will not run on any version of
> wine later that the 1022999 ver.. Seems Any newer version causes an
> "ERROR no 6 and stuff about not being able to find "wordperfect" or
> quattropro executuables, and also saying it is a wine error.
> My question, is there a way to install
2012 Nov 05
6
err: Could not request certificate when I run "puppet device"
1. I get the following error when I run “puppet device’
err: Could not request certificate: Could not write
/var/opt/lib/pe-puppet/devices/certname/ssl/private_keys/certname.pem to
privatekeydir: Permission denied -
/var/opt/lib/pe-puppet/devices/certname/ssl/private_keys/certname.pem
Any thought?
Thanks,
--
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2020 Oct 05
1
Simultaneous Equation Model with Dichotomous Dependent Variables
Hello everyone!
I am currently working with a time series panel data set measuring six dependent variables:
4 of which are binary and 2 of which are count data.
I am interested in constructing a model to measure if the dependent variables influence one another.
For example: DV1~ DV2 + IV1+IV2+ Controls and DV2~ DV1 + IV1+ IV2+ Controls
(where IV stands for independent variable, not