Displaying 20 results from an estimated 8000 matches similar to: "The 'subset matching' challenge"
2013 Jan 23
1
New Book: Statistical Psychology with R [in French]
Dear useRs,
French reading people among you might be interested by the following book:
Noel, Y. (2013). Psychologie statistique avec R [Statistical psychology
with R, in French], coll. PratiqueR, Paris: Springer.
http://www.springer.com/psychology/book/978-2-8178-0424-8
This book provides a detailed presentation of all basics of statistical
inference for psychologists, both in a fisherian
2010 Aug 13
1
Lattice: Superimposing histograms with different colors and transparency effects
Dear users,
I would like to plot several histograms superimposed on the same panel
with different colors, with superimposed polygons appearing with
transparency effects. I also want estimated densities to appear on the
same plot. For several reasons, including that I like it, I want to use
the lattice package.
I have several questions regarding the use of the 'histogram' function
with a
2012 Jan 03
3
An R interface to Model Building
Hello all,
To anyone who is interested, I'm trying to learn a bit more about
developing applications in R with user interfaces. I've been playing
around with gWidgets to develop a model building interface.
I'd appreciate any comments, suggestions, or guidance on how to better
structure my R code and organize the programming task. In addition,
any suggestions for features and
2010 Sep 14
2
Object oriented programming in R.
Hello everyone.
I would like to create many objects with R. Does R support objects?
The number of objects needed is not predetermined and it is a parameter
specified by the user.
If the user selects to create many objects like 100, would it be possible to
handle each one by some index?
I would like to thank you in advance for your help.
Best Regards
Alex
[[alternative HTML version
2011 Sep 01
1
Hysteresis modeling and simulation
Can anyone suggest a package or code for modeling a hysteresis process in R?
I'm currently modeling a certain dataset with a GAM using mgcv, something
like
gam(y~ s(x, by=z) + z, family = Gamma(link=log),data=data)
and getting fits with about 9 estimated degrees of freedom in the smooth for
each value of z. FWIW, z is a treatment applied to a system which should
have made an improvement,
2010 Apr 09
6
How to run Shapiro-Wilk test for each grouped variable?
I want to run Shapiro-Wilk test for each variable in my dataset, each
grouped by variable groupFactor.
I have these working commands:
> data.n<-names(data) # put names into a vector called data.n
> by(eval(parse(text=(paste("data",data.n[3],sep="$")))), data$factor, shapiro.test) #run shapiro.test
but I must to change the variable number manualy. How to automate
2012 Jan 19
4
Bayesian data analysis recommendations
Dear all,
I am trying to learn Bayesian inference and Bayesian data analysis, I
am new in the field. Would any experts on the list recommend any good
sites or materials for beginners?
My approach is to learn and understand the theory first, then program
on my own using R, though I see there are already packages.
appreciate any help, thanks in advance!
2008 May 04
2
Ancova_non-normality of errors
Hello Helpers,
I have some problems with fitting the model for my data...
-->my Literatur says (crawley testbook)=
Non-normality of errors-->I get a banana shape Q-Q plot with opening
of banana downwards
Structure of data:
origin wt pes gender
1 wild 5.35 147.0 male
2 wild 5.90 148.0 male
3 wild 6.00 156.0 male
4 wild 7.50 157.0 male
5 wild 5.90
2011 Nov 26
4
SPSS -> R
I'm an SPSS user trying to make the transition to R.
Can someone help me translate the following SPSS code into R?:
GLM Total_tp1 Total_tp2 WITH Age Sex
/WSFACTOR=Time 2 Repeated
/METHOD=SSTYPE(3)
/CRITERIA=ALPHA(.05)
/WSDESIGN= Time
/DESIGN= Age Sex Age*Sex.
Also. can anyone recommend any resources to help SPSS users learn to things in R?
Thanks,
-kristi
[[alternative HTML
2008 Jun 09
2
Comparing two groups of proportions
Hi,
I have a seemingly common problem but I can't find a proper way to approach
it. Let's say we have 5 samples (different size) of IC circuits coming from 5
production lines (A, B, C, D, E). We apply two different non-destructive QA
procedures to each sample, producing to sets of binary outcomes (passed:
no/yes). So, we have two groups of proportions:
QA1 QA2
no/yes no/yes
A
2011 Nov 23
2
SPSS F-test on change in R square between hierarchical models
Hi,
I am wondering if anyone knows how to perform an F-test on the change in R
square between hierarchical models in R? SPSS provides this information and
a researcher that I am working with is interested in getting this
information. Alternatively, if someone knows how I can calculate the test
statistic (SPSS calls it F-change?) and dfs that would be helpful as well.
The output and the test I am
2003 May 12
1
Plotting expressions with indicies
Hello,
I would like to plot a series of math symbols on a graph with ordered indicies
: expression(delta[1]) expression(delta[2]) etc.
Is there a mean to write this in a for loop ?
for(i in 1:6) text(i,i,expression(delta[i]))
does not work ('i' is not evaluated).
Thanks in advance,
Y. Noel
2011 Nov 28
5
window manager interface commands for linux
How can i replicate this in Linux:
source(file.choose())
I've tried source(tkgetOpenFile()) but with no luck
2012 Mar 12
3
Idea/package to "linearize a curve" along the diagonal?
Hi,
I am trying to normalize some data. First I fitted a principal curve
(using the LCPM package), but now I would like to apply a
transformation so that the curve becomes a "straight diagonal line" on
the plot. The data used to fit the curve would then be normalized by
applying the same transformation to it.
A simple solution could be to apply translations only (e.g., as done
after a
2004 May 13
5
code for functions in base package
Is there any way that I can see the step by step code for functions in
the base package? For instance the dexp function. I am a student
working on writing my own function for something that is similar to
this dexp function and I would like to see the step by step code.
Brittany Laine
GTA WVU Statistics Department
331 Hodges
2003 Mar 31
2
point-biserial correlation
Dear list,
has anyone written a package/function in R for computing a point-
biserial resp. biserial correlation?
Thanks in advance
Bernd
2020 Jan 10
5
copying files to fill flash drives
Back in the days of DOS I had a program that I obtained from somewhere called FILL.
FILL would take the name of a directory and then start writing files from that directory onto a series of floppy disks in such a way that each disk was made as full as possible, but without modifying the files that it was writing.
So you might end up with disk 1 having files A B and D on them since D fitted but C
2006 Jan 04
7
Replacing backslashes with slashes
Hello,
I've seen this question asked in the archives but no clear reply or solution
provided. So, just to be sure it is not possible in R: Can I replace
backslashes with slashes in a string ?
I am writing a GUI for R with the Rpad library. I have a "browse" button for
data loading and Windows return a path string with backslashes. I need to
convert them into slashes to use the
2009 Dec 07
4
Subset sum problem.
Hi,
I'm quite new to the R-project. I was suggested to look into it because I am
trying to solve the "Subset sum" problem", which basically is:
Given a set of integers and an integer s, does any non-empty subset sum to s?
(See http://en.wikipedia.org/wiki/Subset_sum_problem)
I have been searching the web for quite some time now (which is how I
eventually discovered that my
2010 Jun 04
7
Wrong symbol rendering in plots (Ubuntu)
Hi I am having problems with the rendering of scientific symbols (mu and
degree) in my plots. Whenever I use these symbols they are rendered
changed (mu is changed to the proportionality symbol and degree is
changed to something resembling a gamma) in the X-device. If I make a
pdf of the plot and open the file in Evince or Okular symbols are also
rendered wrong, however if I open the file