Displaying 20 results from an estimated 400 matches similar to: "nested (hierarchical) anova"
2007 Jun 12
2
barplot and map overlay
Hi,
I wonder if it is possible with the graphics package to overlay one or several plots
(barplots, for example) over a map. Data for the map is in a data frame with the
latitude and longitude coordinates, and then:
> plot(map$long, map$lat, type ="l")
produces the map. I want to put each barplot in specific locations on the map, namely
at the center of "statistical
2000 Jan 04
0
multiple comparison function
Hi
I asked a while ago about multiple comparison tests for use with
multi--way ANOVAs. Thanks to all those who replied and gave me
some ideas and functions.
What I ended up doing was writing my own function for Tukey's
HSD test (ref: Zar's Biostatistics pg 186-190), as this was the
procedure I could best understand.
I've included my function here for those who may be interested.
2008 May 05
1
proportional test on epicalc library vs. Jerrold H. Zar.
Hi everyone,
I'm working with the Epical library, specicatly using the power test in
proportions. I think this test is not working like in the book:
Biostatistical Analysis (4th Edition): Jerrold H. Zar
In the example 23.25. (I attach this Pic) It's not the same answer.
Using the follow command don't give the same answer.
library(epicalc)
power.for.2p(0.75, 0.50, 50, 45, alpha =
2009 Jan 19
2
plotting arrows with different colors and varying head size
Dear list,
I would like to plot arrows with different colors according to arrow length, and also (if
possible) with head size proportional to arrow length. The idea is to make a quiver-like plot of
matlab with wind speed data.
So far, I´ve been able to use different colors, but I need to find a more efficient way to recode
arrow length intervals into colors. On the contrary, I can't define
2004 Apr 25
2
nonparametric multiple sample comparison
Hello all,
Here goes one of my first functions.
I want to make a nonparametric multiple sample comparison with unequal sample
sizes (see Zar?s Biostatistical Analysis, 3rd. Ed., pg. 201 Example 10.11, pg.
288 Example 11.10). In the real world, I want to compare samples of fish
length captured with different fishing gears.
After using the Kruskal-Wallis test I want to check the differences
2009 Feb 12
0
Comparing slopes in two linear models
Hi everyone,
I have a data frame (d), wich has the results of mosquitoes trapping in
three different places.
I suspect that one of these places (Local=='Palm') is biased by low
numbers and will yield slower slopes in the variance-mean regression over
the areas. I wonder if these slopes are diferents.
I've looked trought the support list for methods for comparing slopes and
found the
2001 Mar 22
0
[Fwd: FW: Biostats text/software]
[This was filtered (looking like spam)
and manually approved by your list maintainer, MM ]
EvolDir wrote:
> Colleagues,
>
> A few days ago I posted a message inquiring what folks were using for
> teaching biostats. I received a stunning 38 replies offering various
> opinions, some quite surprising, along with links to web pages, pointers for
> coverage, commentaries on
2009 Aug 10
1
manipulating text to generate different formulas to use in nls()
Hello,
In doing a series of non-linear estimations of a function which is a sum of a varying number
of sinusoids, I would like to "autogenerate" the arguments needed by nls() depending on that
number.
For example, when there are two sinusoids:
> nls( y ~ mu + A1 * cos(2*pi*f1*x - P1) + A2 * cos(2*pi*f2*x - P2), data = some.xy.data,
start = list( mu=some.value0,
2013 Dec 03
1
[LLVMdev] Please update LDC references on LLVM website
On 03.12.2013 14:30, Rafael Espíndola wrote:
> Can you send a patch?
Hi Rafael, the patch is attached.
@Mikael, Tim
Thanks for the help. I really needed only the link to the repo.
Regards,
Kai
>
> On 2 December 2013 06:44, Kai Nacke <kai at redstar.de> wrote:
>> Hi!
>>
>> I like to submit some updates to the LLVM website regarding the LDC
>> compiler. All
2001 Sep 20
0
G-test : log-likelihood ratio test
I've written a g.test() aka log-likelihood ratio test function for my
opwn use. It's something I've seen requested (and looked to find
myself) on this list a few times.
It has the same basic syntax as chisq.test().
It does both goodness of fit tests and tests of independence.
Yates' and Williams' corrections are implemented.
I've put some examples from Sokal & Rohlf
2005 Jun 03
1
Reading biplot function's source code
Hi everybody,
Excuse me for this silly question, but after searching the
help archives I'm still unable to find my way to read the
source code of the "biplot" function in R.
I have installed the mvbutils package, and tried:
> fixr(biplot)
which only gives me:
function (x, ...)
UseMethod("biplot")
with no further details....
I'd like to read the code to see if
2005 Jan 21
1
Webmin Module for Asterisk (and thirdlane)
Same here.
I called them yesterday plus email and still no reply.
-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of
brett-asterisk@worldcall.net
Sent: Friday, January 21, 2005 10:28 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Webmin Module for Asterisk (and
2011 Nov 15
0
Quantstrat; error with applyStrategy()
I'm testing out quantstrat using a simple one-indicator strategy.
The error I get after applyStrategy(...) is
Error in .xts(e, .index(e1), .indexCLASS = indexClass(e1), .indexFORMAT = indexFormat(e1), :
index length must match number of observations
In addition: Warning messages:
1: In match.names(column, colnames(data)) :
all columns not located in roc_15 for STOXX.Open STOXX.High
2010 Jan 19
4
coping with a warning in if()
Hi,
I'm sure this one is very easy....
I am trying to write a function where one of its arguments has two posible (strings) values,
defaulting to one of them if none is specified. My problem is that when evaluating the function
the following warning is produced:
"the condition has length > 1 and only the first element will be used"
I've read the help page of if() but I
2003 Jan 07
0
Your Enterprise Java/J2EE Architect Requirement
Good morning and Happy New Year 2003!
Let it be prosperous for both you and me!
Below you see a very short version of my CV as of January 2003
for your kind consideration and update.
Word, TXT, and PDF version of the complete CV are available upon request.
Enjoy the economic recovery!
Make it a great day:
ZAR
=================================================================
ZAR PETKOV,
2005 May 02
2
Nonparametric Tukey-type multiple comparisons "Nemenyi" test
I am trying to do a Nonparametric Tukey-type multiple comparison
post-hoc test to determine which groups are significantly different. I
have read the dialogue on this topic from the R-help, and am still not
clear why no statistical packages include this test as an option? Is it
not an appropriate test to conduct on non-normally distributed data? Is
the only option to calculate it by hand
2003 Apr 15
1
About kruskal.test
Hi,
I'm newbie in R package,
but i'm extremely gratefull for these list!
is there possible to make kruskal.test
summarize the sum of ranks??
e.g
#####
z<-c(1.2,3.4,0,0,0,0,0)
ranks(z) # like in octave package
ans=
6 7 3 3 3 3 3
sum(ranks(z))
ans= 28
###
then apply multiple comparisions for many other data
SE<-sqrt(n*(n*k)*(n*k+1)/12) # according Zar,JH. Bioestatistical
2004 Nov 04
1
Specifying error terms in aov and lme
I need to specify error terms properly in a mixed-effects anova model. I
know you can add error terms in aov using Error and can specify random
factors in lme but I am not sure how these get treated.
When making the calculations for fixed and random factors, are the correct
error terms used and how can you get aov or lme to use different error
terms for fixed and random effects?
I'm
2000 Nov 01
3
triangular matrix
How I make the below matrix
| a^0 0 0 ... 0 |
| a^1 a^0 0 ... 0 |
| a^2 a^1 a^0 ... 0 |
| . |
| . |
| . |
| a^n a^(n-1) a^(n-2) ... a^0 |
with no loops, where "a" is a constant?
========================================================================
C?zar de Freitas
Depto. de Estat?stica - UFPE
Recife - Pernambuco - Brasil
2002 Apr 15
1
simple Q: required sample size & usage of power.t.test()
Hi community,
Seems I am too stupid:
I try to calculate with power.t.test() an example from the statistics textbook [Jerrold H. Zar, Biostatistical Analysis, 2nd edition, Prentice Hall, 1984, Chapter 8, Exercise 8.4, (page 120)]:
-------
A sample of size 18 has a mean of 13.55cm and a variance of 6.4512cm^2.
(a) Calculate the 95% confidence interval for the population mean.
(b) How large a