Displaying 20 results from an estimated 70 matches similar to: "Significances of Korrelations and Sweave"
2003 Nov 28
0
For those of you that uses syn Text Editor to edit .R files
Hi,
sorry to bother you, and that this is probably not the right list :-),
but I read that some of you might use syn as Editor
for .R files. I've released an unofficial Version of the syn Text Editor
with improved support for R (I'm the initial developer of this program,
btw.). syn is a Windows 32 Program (Win9x, NT4, 2000), but maybe it runs
also inside Wine, I didn't try it.
2013 Jun 15
2
quick Help needed
Hi,
i am new to this forum and not sure how it works,
I am trying to do deskriptive descripe my data in terms of gender:
head(scltotal)
pbnr dat dep dys sop ago mis age female messpunkt2
messpunkt1 tage eintrittsjahr
1 10023 1994-02-21 0.75 1.00 0.50 0.50 0.75 35 1 8817
8817 0 1994
2 10023 1994-05-25 0.75 1.00 0.50 0.50 0.75 35 1 8910
8817
2007 Aug 06
1
test the significances of two regression lines
R-help,
I'm trying to test the significance of two regression lines
, i.e. the significance of the slopes from two samples
originated from the same population.
Is it correct if I fit a liner model for each sample and
then test the slope signicance with 'anova'. Something like this:
lm1 <- lm(Y~ a1 + b1*X) # sample 1
lm2 <- lm(Y~ a2 + b2*X) # sample 2
anova(lm1, lm2)
2008 Jul 17
0
Re : float and double precision with C code
thank you for your quick answer,
I'm far of the digits capacity and my values are not the result of a computation. I'm developping a R package to acces a specific data source. And I need precision a few better. How can I do ?
When I try this In R console, this is correct and what I need :
> my_value <- 29.958334
> my_value == 29.958334
[1] TRUE
But I need to do the first
2012 Feb 08
2
remove NAs from list collectively
Hi,
I am importing dataframe from an Excel file (xlsx package).
The columns contain acutally measurements for single species and
the column-length is of variable. As it is imported as a dataframe the difference to the "longest" column is filled with NA.
To explain it with an example, my dataframe looks like:
A <- seq(1:10)
B <- c(seq(1:5),rep(NA,5))
C <- c(seq(1:7),rep(NA,3))
2008 Jul 17
0
Re : Re : float and double precision with C code
ok, sorry, my mistake was the C printf.
Thank you for your good answer
Regards
----- Message d'origine ----
De : JS Ubei <jsubei at yahoo.fr>
? : jim holtman <jholtman at gmail.com>
Cc : r-help at r-project.org
Envoy? le : Jeudi, 17 Juillet 2008, 15h25mn 07s
Objet : [R] Re : float and double precision with C code
thank you for your quick answer,
I'm far of the digits
2007 Apr 24
1
inner loop problem!?
Hi,
i have 656 attributes ind INTERVALL_VAR & 119 in GROUP
and this morning i'm little confused why the inner loop hang if it
arrive 656th column.
My Task is a t-test and correlation with all columns in INTERVALL_VAR
for all attributes in GROUP.
many thanks & regards,
christian
for( k in
1:length(GROUP)){
2006 Jan 06
1
lmer p-vales are sometimes too small
This concerns whether p-values from lmer can be trusted. From
simulations, it seems that lmer can produce very small, and probably
spurious, p-values. I realize that lmer is not yet a finished product.
Is it likely that the problem will be fixed in a future release of the
lme4 package?
Using simulated data for a quite standard mixed-model anova (a balanced
two-way design; see code for the
2007 Sep 03
0
some problems with "linebuffer"; was: Bug?
Johanna Hasmats wrote:
> Ok, attaching all files. You need to run it in the following order:
>
> parse.RData
>
> Korrelation.RData I have reduced this script to only include the error
> part.
>
>
> Input files are in the following order:
>
> oligo.prest.out for parse.RData to work. Produces the next input file
>
> oligolista for Korrelation.RData to
2005 Oct 05
1
Analyses of covariation with lme() or lm()
Hello all!
I have a problem that calls for a better understanding, than mine, of
how lme() uses the random part of the call.
The dataset consists of eleven field trials (Trial) with three
replicates (Block) and four fertiliser treatments (Treat). Analysing for
example yield with lme() is easy:
m1 <- lme(Yield ~ Treat, data=data,
random =~1| Trial/Block)
giving estimates of
2008 Mar 06
1
kruskal wallis post hoc test in R
Hello,
I need nemenyi-test or any other post-hoc test for kruskal-wallis, but I
just can't find out how to implement this in R.
My data set is nitrite concentrations in four different groups which I
intend to compare. The kruskal-wallis-test showed significance, but I
still don't know between which groups these significances are.
Can anybody help me with this?
Thanks
2010 Feb 23
1
how to assess the significance of regression between a set of response and predictor variables
Dear list,
I have been using multivariate multiple regression (MMR) in the form
lm(Y~X) where Y and X are matrices of response and predictor variables.
I know that summary(mlm.object) would give the usual lm statistics for
each response variable separately and that anova.mlm(mlm.object) will
give the analysis of variance table of the mlm object. However,
anova.mlm (also manova(mlm.object))
2005 Oct 07
1
The mathematics inside lme()
Hello all!
Consider a dataset with a grouping structure, Group (factor)
Several treatments, Treat (factor)
Some sort of yield, Yield (numeric)
Something, possibly important, measured for each group; GroupCov (numeric)
To look for fixed effects from Treat on Yield, a first attempt could be:
m1 <- lm(Yield ~ Treat)
which gives, in a symmetric situation, the same estimated fixed effects as:
2011 Nov 15
2
Models with ordered and unordered factors
Hello;
I am having a problems with the interpretation of models using ordered or
unordered predictors.
I am running models in lmer but I will try to give a simplified example
data set using lm.
Both in the example and in my real data set I use a predictor variable
referring to 3 consecutive days of an experiment. It is a factor, and I
thought it would be more correct to consider it ordered.
Below
2010 Jun 06
1
Why did TukeyHSD not work when I used it for post-hoc for 2way within-subjects anova?
Dear R people,
I have a couple of questions about post-doc analyses for 2 by 2 within
subjects ANOVA. I conducted a psycholinguistic study that combined a 2 by 2
design and a latin square design. Specifically, I had 32 items each of which
generated 4 conditions. Participants saw each of the 32 items only once: 8
in Condition A, 8 in B, 8 in C, and 8 in D. The table below serves as an
example.
2004 Sep 08
1
Problem playing file with G729A
Hi,
I tried to play the standard demo-echotest file !.
It works when i use an ip-phone (like x-lite or kphone), but as far as i
use an PSTN Gateway (from an VOIP Provider) to call my phone - i get the
following error:
Sep 8 14:58:33 NOTICE[-182461520]: channel.c:1691 ast_set_write_format:
Unable to find a path from GSM to G729A
Sep 8 14:58:33 WARNING[-182461520]: file.c:779 ast_streamfile:
1999 Dec 13
1
file-permition samba vrs novell !
hi there !
I want to change a novell-netware server to a samba server, and
there i have a big problem with the file-permitions !
we use a big database-system. the clients searches for the
programs and for the data's on the same drive, so i must have one
share with different rights (rwx ... for data and rx for programs)
the directory structure is the following:
vol1\
\flex31d
2005 Nov 30
0
nls and weighting
I posted this a week ago on r-devel but to no avail and hope this not
considered cross-posting:
===============================cut===============================
hi everybody,
which each release I hope that the section
"weights: an optional numeric vector of (fixed) weights. When present,
the objective function is weighted least squares. _not yet
2012 Oct 17
0
How to optimize or build a better random forest?
Hello Everyone!
It's been a while since I last posted a question! Hope everyone has been
doing well!
~~~ CONTEXT ~~~
I have recently entered a beginner-level competition on kaggle. The
goal of the competition is to build a model that predicts who did/did not
survive on the Titanic.
I decided to use random forests as I have been wanting to learn the
algorithm and the competition
2002 Dec 15
2
Interpretation of hypothesis tests for mixed models
My question concerns the logic behind hypothesis tests for fixed-effect
terms in models fitted with lme. Suppose the levels of Subj indicate a
grouping structure (k subjects) and Trt is a two-level factor (two
treatments) for which there are several (n) responses y from each
treatment and subject combination. If one suspects a subject by
treatment interaction, either of the following models seem