Displaying 20 results from an estimated 5000 matches similar to: "computing a p-value for a one-way ANOVA given only means and std dev of 5 factor levels"
2003 Nov 15
0
FW: computing a p-value ...
Thanks to Rolph Turner and Jason Turner ...
I guess I was too excited about getting back on the list after an absense of
several years ... I'll be a little more thoughtful about the problem before
posting next time, and a little less trigger-happy with the "Send" e-mail
button.
Never-the-less, much appreciated.
- Mohamed
-----Original Message-----
From: Rolf Turner
2000 Jul 28
0
RJava and Orca...
It's cool, it's exciting, and much thanks to Duncan. He announced
RJava yesterday (or this morning?) on the R-devel list, and it's
really worth it.
http://www.omegahat.org/RSJava
for more details.
But it does mean that we can run Orca code directly within R, (without
Thomas' socket connections) (and also means that we really need a
"stop" button, since killing
2013 Apr 12
1
[LLVMdev] Problem with Store of i8 in a global address
Hi,
I am creating a new backend for a custom microcontroller.
In order to create the backend I am modifying from Mips backend.
My architecture has a store instruction with direct address mode. It
accepts two arguments: source register and address (immediate). This
instruction is not available in Mips, but it is in Hexagon, so I copied
from Hexagon the following, adapting it to my registers:
-
2012 May 03
1
Proposal: model.data
Greetings:
I'm still working on functions to make it easier for students to
interpret regression predictions. I am working out a scheme to
more easily create "newdata" objects (for use in predict functions).
This has been done before in packages like Zelig, Effects,
rms, and others. Nothing is "exactly right," though. Stata users keep
flashing their "predicted
2010 Jul 30
4
Programming Statistical Functions
Hello,
I'm new in R. I'm meteorological modeller and i will calculate some
statistics for my model results.
These statistis are the follow:
ANB: Average Normalized Absolute BIAS
MNB: Mean Normalized BIAS
MNE: Mean Normalised Error
STDE: Standard Deviation of Error
FB: Fractional BIAS
MG: Geometric Mean BIAS
VG: Geometric Variance
SKVAR: Skill Variance
RMSE: Root Mean Square Error
NMSE:
2004 Aug 06
2
Hello
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2016 Sep 09
2
defaults for FP contraction [e.g. fused multiply-add]: suggestion and patch to be slightly more aggressive and to make Clang`s optimization settings closer to having the same meaning as when they are given to GCC [at least for "-O3"]
Dear all,
In the process of investigating a performance difference between Clang & GCC when both compile
the same non-toolchain program while using the "same"* compiler flags, I have found something
that may be worth changing in Clang, developed a patch, and confirmed that the patch has its
intended effect.
*: "same" in quotes b/c the essence of the problem is that the
2013 Mar 03
2
Kolmogorov-Smirnov: calculate p value given as input the test statistic
Dear all,
I calculate the test statistic for the KS test outside R, and wish to use R
only to calculate the corresponding p-value.
Is there a way for doing this? (as far as I see, ks.test() requires raw
data as input). Alternatively, is there a way to provide the ks.test() the
two CDFs (two samples test) rather than the (x, y) data vectors?
Thanks in advance,
Rani
2007 Mar 19
1
-std=c99 and inline semantics
Hi,
I noticed that with the GCC trunk (4.3.0), the semantics of "extern
inline" have reversed.
The net result is that R will build without the usual-stdc=gnu99 but it
won't with it.
Many multiple definitions result otherwise.
Marcus
2013 Dec 05
1
p value for mu: anova()
Hello
I have run an anova analysis for the fallowing model: H_obs=mu+REGION+MANAGEMENT + e
When I run it in ASRelm I get the p-value for mu, and, of course also for the two dependent variables (REGION and MANAGEMENT)
When I run it in R, I do not get the pvalue for mu.
Can some one help me to understand why? and if it is possible to estimate the pvalue for mu in anova() in R?
I attach the
2009 Apr 14
1
Help with ANOVA p-values
Hi
I have done ANOVA on a dataset (See Below) but am having problems retreiving the p-value. I am assuming that Pr(>F) is the p-value but cannot get this value or in fact any other value (e.g. DF) from the summary.Any suggestions??
I have tried
sum<-summary(zzz.aov)
> sum$Pr(>F)
Error: unexpected '>' in "sum$Pr(>"
> sum$"Pr(>F)"
NULL
>
2009 Feb 13
2
how to obtain p values from an ANOVA result
Hi all,
I'm tryint to turn my ANOVA result from anova(model) in to p values. The
default output is:
term ; Df ; Deviance ; resid Df; Resid. Dev
Is there a way to add p values to this output so the significance of the
terms can be easily determined?
Thanks in advance.
Richie
[[alternative HTML version deleted]]
2009 Apr 28
2
Why there is no p-value from likelihood ratio test using anova in GAM model fitting?
Hello, everybody,
There is the first time for me to post a question, because I really cannot
find answer from books, websites or my colleagues. Thank you in advance for
your help!
I am running likelihood ratio test to find if the simpler model is not
significant from more complicated model. However, when I run LRT to compare
them, the test did not return F value and p-value for me. What's the
2008 May 08
2
anova p value extraction
hello all,
Quick question, how do I get the p value out of the anova?
Thanks,
Paul
> pb<-aov(as.numeric(diff[5,16:33]) ~ grF)
> summary(pb)
Df Sum Sq Mean Sq F value Pr(>F)
grF 3 2.7860e+10 9.2867e+09 4.2236 0.02534 *
Residuals 14 3.0783e+10 2.1988e+09
---
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 '
2011 Oct 06
1
anova.rq {quantreg) - Why do different level of nesting changes the P values?!
Hello dear R help members.
I am trying to understand the anova.rq, and I am finding something which I
can not explain (is it a bug?!):
The example is for when we have 3 nested models. I run the anova once on
the two models, and again on the three models. I expect that the p.value
for the comparison of model 1 and model 2 would remain the same, whether or
not I add a third model to be compared
2005 Jan 31
2
Automatically Extracting F- and P- vals from ANOVA
Dear R community,
I'm currently using R to analyze functional Magnetic Resonance Imaging
data. Each analysis involves running ~120,000 repeated-measures
ANOVAs.
I would like to know if there is any automatic way to access the F-
and P-value data that are associated with each of these 120,000
ANOVAs.
For example, if the summary output (for the 1st ANOVA of 120,000)
shows the following value
2009 Sep 04
3
Using anova(f1, f2) to compare lmer models yields seemingly erroneous Chisq = 0, p = 1
Hello,
I am using R to analyze a large multilevel data set, using
lmer() to model my data, and using anova() to compare the fit of various
models. When I run two models, the output of each model is generated
correctly as far as I can tell (e.g. summary(f1) and summary(f2) for the
multilevel model output look perfectly reasonable), and in this case (see
below) predictor.1 explains vastly more
2012 May 08
2
mgcv: inclusion of random intercept in model - based on p-value of smooth or anova?
Dear useRs,
I am using mgcv version 1.7-16. When I create a model with a few
non-linear terms and a random intercept for (in my case) country using
s(Country,bs="re"), the representative line in my model (i.e.
approximate significance of smooth terms) for the random intercept
reads:
edf Ref.df F p-value
s(Country) 36.127 58.551 0.644
2003 Jan 07
2
Extracting means for given strata from dissimilarity object
Is there a way of extracting mean distance or dissimilarity for a given
strata from a 'dist' or 'dissimilarity' object, e.g. extract mean distances
for each species in Anderson's iris data?
data(iris)
iris.dist<-dist(iris[,1:4])
then what?
Mikkel Grum, PhD
Genetic Diversity Scientist
International Plant Genetic Resources Institute (IPGRI)
Sub-Saharan Africa Group
***
2010 Jan 11
1
K-means recluster data with given cluster centers
K-means recluster data with given cluster centers
Dear R user,
I have several large data sets. Over time additional new data sets will be created.
I want to cluster all the data in a similar/ identical way with the k-means algorithm.
With the first data set I will find my cluster centers and save the cluster centers to a file [1].
This first data set is huge, it is guarantied that cluster