Displaying 20 results from an estimated 1000 matches similar to: "Comprehensive New Learning Resource for R"
2011 Oct 17
2
special language character in a pie chart
Dear List Members,
I am working on a below piece of code: Initially have created pie
charts with Enlish labels to present the data for Czech Republic, now
however I need to print the label with original Czech fonts.
When I copy paste from Word, certain fonts get 'simplified' distorting
original spelling. How can solve this problem? Is there a package I
can download which will support
2011 Dec 01
2
References for book "R In Action" by Kabacoff
I know this is not really an R question - it is a query about a recent book
on R ("R In Action") by Robert Kabacoff, (Manning Publications 2011).
There are many references to interesting topics in R in the book, BUT, I do
not find a bibliography/list of references in the book!
Does anybody know if there are errata for the book available some place?
Thanks,
Ravi
--
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2007 Dec 07
0
Studentized maximum modulus distribution
Can anyone tell me how to calculate quantiles of the studentized maximum modulus distribution using R?
Thanks!
__________________
Rob Kabacoff, Ph.D.
www.statmethods.net
[[alternative HTML version deleted]]
2007 Feb 07
1
FOSDEM: Lodging and presentations
Hi all,
Since it looks like I''ll be attending FOSDEM, I now need to find some
lodging, and if possible I''d like to line up a presentation or four.
Someone in the community offered to let me crash with them if I came
to the conference (someone with the nick of ''robk'' on IRC, I think),
so I''d like to take that person up on it if possible.
2012 Mar 04
1
rpart package, text function, and round of class counts
I run the following code:
library(rpart)
data(kyphosis)
fit <- rpart(Kyphosis ~ ., data=kyphosis)
plot(fit)
text(fit, use.n=TRUE)
The text labels represent the count of each class at the leaf node.
Unfortunately, the numbers are rounded and in scientific notation rather
than the exact number of examples sorted by that node in each class.
The plot is supposed to look like
2009 Oct 14
1
Announcement: New R book--50% off today only
Hi all,
This is Steven with Manning Publications. I wanted to announce the
launch of a new R book: R in Action by Rob Kabacoff. Rob was recently
interviewed for this piece on Teradata about the growth of R into new
fields and the future of R. The book gives thorough coverage of the R
environment with dozens of practical examples of its uses.
We're doing a one day 50% off deal on the
2012 Sep 10
1
Memory errors using lmer
Hello R List,
I'm trying to run a linear mixed effects analysis on fairly large datasets with lmer (from the lme4 package) on a 32-bit Windows machine running XP with 3 GB of RAM. It's not working. (details below)
I've researched the ff and bigmemory packages, but it appears they won't handle the mixed mode dataset I'm analyzing. It has some character fields for the
2008 Mar 06
2
Principle component analysis function
Dear All,
In a package, I want to use PCA function. The structure I used follow this
page: http://www.statmethods.net/advstats/factor.html.
fit<-principle(mydata, nfactors=9, rotation=TRUE)
or:
result<-PCA(mydata)
But I don't known why R language in my computer noticed: "not found
principle", "not found PCA".
I download and installed
2013 Jun 27
1
corrgram with two datasets
Hi,
I would like to display inter-parameter scatter plots like those with the corrgram package (see upper triangle here: http://www.statmethods.net/advgraphs/images/corrgram2.png ), just that I would like to plot two datasets instead of one. Say one with black and one with red dots. Or a merged dataset where an indicator column is used to assign different colors to particular dots - with still
2010 Apr 21
1
Can I compare two clusters without using their distance-matrix (dist()) ?
Hello all,
I would like to compare the similarity of two cluster solutions using a
validation criteria (such as Hubert's gamma coefficient, the Dunn index the
corrected rand index and so on)
I see (from here:http://www.statmethods.net/advstats/cluster.html) that
the function cluster.stats() in the fpc package provides a mechanism
for comparing 2 cluster solutions - *BUT* - it requires me to
2010 May 03
1
rpart, cross-validation errors question
I ran this code (several times) from the Quick-R web page (
http://www.statmethods.net/advstats/cart.html) but my cross-validation
errors increase instead of decrease (same thing happens with an unrelated
data set).
Why does this happen?
Am I doing something wrong?
# Classification Tree with rpart
library(rpart)
# grow tree
fit <- rpart(Kyphosis ~ Age + Number + Start,
2010 Jun 16
1
Mean variance plot of a data frame
Hello,
I have a data frame that looks like
Position, Relevance
0, 0.151531117072265
0, 0.245532564696541
0, 0.285207130323724
0, 0.302718099889669
0, 0.308213700400889
0, 0.341562706518953
0.0151515151515152, 0.368991215730364
0.0263157894736842, 0.256406702156839
0.0263157894736842, 0.344003157058329
0.0303030303030303, 0.200307950418176
0.0303030303030303, 0.558093143666938
0.04,
2013 Jul 02
1
Recursive partitioning on censored data
I am interested in applying a "classification tree" analysis where the
response variable is a censored variable (survival data).
I've discovered the package 'party' through this page:
http://www.statmethods.net/advstats/cart.html. However, as my sample is not
very big I would like to apply 'bootstrap' and use 'random forests', but
with my censored response
2010 Apr 09
1
Problem with Loops
Hello,
I am trying to write a script with the end goal of graphing power (y) as a
result of sample size (x) at a variety of effects sizes. I am new to loops,
and I think my problem is there. Here's the script, which is modified from
the script found at the bootom of
http://www.statmethods.net/stats/power.html. ANy help would be much
appreciated!mtesche at ualberta.ca
library(pwr)
2017 Aug 02
3
How to concatenate in R
Hi,
I have 6 excel files, I want to concatenate all and create one excel files, How to program that in R.(I need the code)
Kind regards,
SUBRAT SWAIN
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2011 May 18
1
Grouped bar plot
Hi,
I am trying to produce a grouped bar plot from a data.frame and I'm
having difficulties figuring out how to do so. My data is 500 rows by
4 columns and basically looks like so:
> head(x)
V1 V2 V3 V4
1 XOM 0.2317915 0.1610068 1.6941637
2 AAPL 0.6735488 0.7433611 0.1594102
3 GE 1.2554160 0.9237384 1.6767711
4 IBM 1.6296938 0.3730387 0.5858115
5 CVX
2012 Jul 04
2
Difference between two-way ANOVA and (two-way) ANCOVA
Hi!
as my subject says I am struggling with the different of a two-way ANOVA and
a (two-way) ANCOVA.
I found the following examples from this webpage:
http://www.statmethods.net/stats/anova.html
# One Way Anova (Completely Randomized Design)
fit <- aov(y ~ A, data=mydataframe)
# Randomized Block Design (B is the blocking factor)
fit <- aov(y ~ A + B, data=mydataframe)
# Two Way
2011 Sep 08
1
"rpart" or "tree" function issue
I am trying to create a classification tree using either tree or rpart
functions but when it comes to plotting the results the formatting I get is
different than what I see in all the tutorials (like
http://www.youtube.com/watch?v=9XNhqO1bu0A or
http://www.youtube.com/watch?v=m3mLNpeke0I&feature=related or
http://www.statmethods.net/advstats/cart.html "tree for kyphosis"). I am
2010 May 05
2
OLS Regression diagnostic measures check list - what to consider?
Hello dear R help list,
I wish to compile a check-list for diagnostic measures for OLS regression.
My question:
Can you offer more (or newer) tests/measures for the validity of a linear
model then what is given here:
http://www.statmethods.net/stats/rdiagnostics.html
This resource gives a list of measures to test for:
OUTLIERS, INFLUENTIAL OBSERVATIONS, NON-NORMALITY, NON-CONSTANT ERROR
2012 Jul 19
2
Line chart with a double matrix
Hello,
I have a double matrix that I want to represent in a line chart. Although I
have seen some examples I still don't manage to get it. My data is this (a
double matrix called mymatrix) :
Blogs Wikis Redes Etiq. SPC LMS
Menor de 30 57.14 28.57 14.29 28.57 57.14 28.57
de 31 a 40 63.83 61.70 29.79 17.02 59.57 70.21
de 41 a 50 72.64 70.75 47.17 20.75 55.66 75.47
Mayor de