Displaying 20 results from an estimated 1000 matches similar to: "reading contigency tables"
2006 Mar 30
2
Unbalanced Manova
Dear all,
I need to do a Manova but I have an unbalanced design. I have
morphological measurements similar to the iris dataset, but I don't have
the same number of measurements for all species. Does anyone know a
procedure to do Manova with this kind of input in R?
Thank you very much,
Naiara.
--------------------------------------------
Naiara S. Pinto
Ecology, Evolution and Behavior
1
2006 Jan 24
1
polr (MASS)
Hello all,
I am trying to use polr (the ordered logistic model from MASS) but I am
getting the following error message:
Error in if (all(pr > 0)) -sum(wt * log(pr)) else Inf :
missing value where TRUE/FALSE needed
My response variable is a factor with 3 levels and I have 2 independent
variables. I am not sure if I guessed the starting parameters right, which
I imagine could be a source of
2006 Jan 21
1
" 'x' must be numeric"
Hello all,
I am importing data from a txt file and try to get a histogram, I get the
message: "Error in hist: 'x' must be numeric".
When I use mode R returns "List".
However when I use srt I get:
`data.frame': 456 obs. of 1 variable:
$ V1: num 0.6344 0.4516 0.0968 0.7634 0.7957 ...
My file consists of one column only (no headers) and I can't figure out
why
2005 Oct 04
1
Rcmdr and scatter3d
Hi folks,
I'd like to use scatter3d (which is in R commander) to plot more than one
dataset in the same graph, each dataset with a different color. The kind
of stuff you would do with "holdon" in Matlab.
I read a recent message that was posted to this list with a similar
problem, but I couldn't understand the reply. Could someone give me one
example? How do you plot subgroups
2007 Dec 18
1
Random forests
Dear all,
I would like to use a tree regression method to analyze my dataset. I
am interested in the fact that random forests creates in-bag and
out-of-bag datasets, but I also need an estimate of support for each
split. That seems hard to do in random forests since each tree is
grown using a subset of the predictor variables.
I was thinking of setting mtry = number of predictor variables,
2006 Nov 13
1
random forest regression
Dear all,
I am doing a regression in ramdomForest, using the option "sampsize" reduce
the number of records used to produce the randomForest object.
The manual says "For classification, if sampsize is a vector of the length
the number of strata, then sampling is stratified by strata, and the
elements of sampsize indicate the numbers to be drawn from the strata". I
need my
2008 Mar 09
1
sampsize in Random Forests
Hi all,
I have a dataset where each point is assigned to a class A, B, C, or
D. Each point is also assigned to a study site. Each study site is
coded with a number ranging between 1-100. This information is stored
in the vector studySites.
I want to run randomForests using stratified sampling, so I chose the option
strata = factor(studySites)
But I am not sure how to control the number of
2008 Jul 04
1
synthax for R CMD INSTALL
Dear all,
I am trying to install rgdal from source on a Mac OS 10.4.11. I installed
GDAL and PROJ as frameworks so the installation does not work unless I
explicitly state where the GDAL and PROJ libraries are. I tried:
R CMD INSTALL rgdal_0.5-25
--configure-args=--with-proj-include=/Library/Frameworks/PROJ.framework/unix/include
--with-proj-lib=/Library/Frameworks/PROJ.framework/unix/lib
but I
2012 Feb 07
1
Grub options for dom0
Hello guys,
I am setting up dom0. I have read that is recommended restricting one
cpu for dom0. In the xen wiki there''s a list of grub parameters
http://wiki.xen.org/wiki/Xen_Hypervisor_Boot_Options
but it seems deprecated?
http://groups.google.com/group/ganeti/browse_thread/thread/a18979bdd00f6461
Do you guys use this option (maxcpus) as shown here as well?
2003 Oct 13
2
contigency tables
Hello everybody,
Can anyone tell me how I could analyze data that are at a contigency table form? I already found function cfa in the cfa package but I still don't understand how I could use this function in order to elaborate a contigency table. Every answer is welcome!
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2011 Nov 29
0
Inlcudung classes in de contigency table + dataoverflow
Hello Everybody,
I'm making a contigency table with a dataset which looks like:
Class Size Member1 Members2 Members3 etc.
1 2 A B 0
2 3 C D A
3 3 B A D
4 3 D
2002 Jan 30
1
mosaicplot(formula, data)--- bugged?
I have been tinkering with mosaicplot() and friends as a way
of learning R. As part of this, I've written a pair.table()
method for mosaic matrices, and would like to extend mosaicplot
to work with loglin and logln (MASS) objects. I'm using
R 1.4.0 on Win 98.
I've been trying to figure out the formula interface, and think
there's a bug, but not sure how to find it, yet alone fix
2012 Sep 26
1
Creating x*y different contigency tables
Dear all,
I am trying to construct 25x31 different matrices of 2x2 dimension. Here
is the problem:
we have the following matrix
matrix(c(54+s0,
43+s1, 56-s0, 67-s1), nrow=2, ncol=2, byrow=T)
the values for s0 and s1 are c(0:24) and c(0:31), respectively.
I wrote the following code without the desired results
2013 Aug 18
1
How does R_UnboundValue and removing variables work?
Reading "R Internals" made me believe that R_UnboundValue was a placeholder
that would be skipped over in variable lookup. viz. the section of R
Internals "Hash tables" says "items are not actually deleted but have their
value set to R_UnboundValue.", which seems to align with what I read in
envir.c.
So, I reasoned, if I have a function that returns R_UnboundValue,
2002 Feb 08
2
bugs or imperfect implementation?
I am using R to teach, and here are a couple of things that I thought
would work didn't work.
1. I noticed the utility data(***,package=***) recently and like it
very much, but unless I type in the whole word "package" I'll get an
error in 1.4.0. For example, data(cats,package=MASS) works fine but
data(cats,pac=MASS) doesn't.
2. drop1 doesn't seem to be as smart as
2008 Sep 26
2
adjusting textsize and spacing in mosaic (vcd package)
I'm trying to find a way to change the font size in a mosaic plot (the
grid version, not the base graphics one).
Here's an example to demonstrate:
#Basic plot
library(vcd)
mosaic(HairEyeColor, shade = TRUE)
#Bad first guess: this stops the default cell colouring, and doesn't
change the font size
mosaic(HairEyeColor, shade = TRUE, gp=gpar(fontsize=16))
#This successfully changes
2008 Nov 16
3
chisq.test with simulate.p.value=TRUE (PR#13292)
Full_Name: Reginaldo Constantino
Version: 2.8.0
OS: Ubuntu Hardy (32 bit, kernel 2.6.24)
Submission from: (NULL) (189.61.88.2)
For many tables, chisq.test with simulate.p.value=TRUE gives a p value that is
obviously incorrect and inversely proportional to the number of replicates:
> data(HairEyeColor)
> x <- margin.table(HairEyeColor, c(1, 2))
>
2005 Nov 12
1
how to make automatically each level from data.frame to vector
Dear R-helpers,
Suppose I have dataset like this below:
data(HairEyeColor)
dfHEC <- as.data.frame(as.table(HairEyeColor))
my.dfHEC <- data.frame(Hair=rep(dfHEC$Hair,dfHEC$Freq),
Eye=rep(dfHEC$Eye,dfHEC$Freq),
Sex=rep(dfHEC$Sex,dfHEC$Freq))
my.dfHEC
my.dfHEC$Hair
my.dfHEC$Eye
my.dfHEC$Sex
and I know all levels for Hair, Eye and Sex.
In my case, I
2009 Dec 15
2
Diagonal Labels on "Beside" Bars in Barplot
My question is based on an example provided in the following:
Referencing:
Statistics with R
Vincent Zoonekynd
<zoonek at math.jussieu.fr>
6th January 2007
URL:
http://zoonek2.free.fr/UNIX/48_R/all.html
data(HairEyeColor)
a <- as.table( apply(HairEyeColor, c(1,2), sum) )
# Provided Example
barplot(a, beside = TRUE,
legend.text = attr(a, "dimnames")$Hair)
# I
2010 Sep 19
1
odds ratios for n-way tables: seeking an *apply-able method
I'm looking for a way to generalize the calculation of (log) odds
ratios for 2 x 2 x {strata} frequency
tables in vcd::oddsratio() to R x C x {strata} tables.
For an R x C table, F, odds ratios can be defined
in several ways; one simple way, particularly for tables with ordered
factors, is to calculate the
set of continuation odds ratios, based on the (R-1)x(C-1) set of 2x2
tables with