Displaying 20 results from an estimated 28 matches for "cjpauw".
2011 Jan 21
5
User input in R program
HI Everybody
Does anyone know of documentation about different ways of obtaining user
input in R. I have used readline() but I wondered is there are sophisticated
packages that does things like validate answers or generate selection
lists.
bets regards
Christaan
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2009 May 14
4
Duplicates and duplicated
Hi everybody.
I want to identify not only duplicate number but also the original number
that has been duplicated.
Example:
x=c(1,2,3,4,4,5,6,7,8,9)
y=duplicated(x)
rbind(x,y)
gives:
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
x 1 2 3 4 4 5 6 7 8 9
y 0 0 0 0 1 0 0 0 0 0
i.e. the second 4 [,5] is a duplicate.
What I want is
2011 Aug 12
1
Extract named regions from an Excel file using XLConnect?
Hi Everybody
In R, the XLConnect package can read and write named region to and from
Excel. In order to read a named region with the readNamedRegion function you
need to know it's name. You can check is a name exists with existsName, but
you still have to know the name. Is there a way to actually get a list of
the named regions in XLConnect sinilar to getRanges in the xlsx package.
On that
2010 Dec 16
1
Is there a join() function in R ? OR: simulating "Combining ggplot2 and Google Maps" by David Kahle
Hi everybody
Im on R version 2.11.1 on Mac OS X
I am working through David Kahle's example of using ggplot2 with Rgooglemaps
(found here:
https://github.com/hadley/ggplot2/wiki/Crime-in-Downtown-Houston,-Texas-:-Combining-ggplot2-and-Google-Maps).
Excellent page by the way. I have downloaded the data and the code and want
to learn how to do this by first simulating David's results and
2011 Jun 01
3
Identifying sequences
Hallo Everybody
Consider the following vector
a=1:10
b=20:30
c=40:50
x=c(a,b,c)
I need a function that can tell me that there are three set of continuos
sequences and that the first is from 1:10, the second from 20:30 and the
third from 40:50. In other words: a,b, and c.
regards
Christiaan
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2009 Jun 17
1
Horisontal line in xtable
Hi everyone (Pardon the incorrect terminology of my previous post: "vertical
line...).
I have created a function that uses xtable to print table of frequencies and
percentages with a heading and some sample information (the sample size and
missing values). The function and example data is below.
I want a horisontal line that separates the results from the sample
information i.e. a
2009 Jun 10
1
by and by: using two indices in by() or tapply()
Hi everyone
I want to apply a function by two indices.
I have a number of surveyors submitting questionnaires. I want to check the
time of the first submission for the day for each surveyor and also see a
NA is no submission was done on a particular day.
This generates a sample of the data:
2009 Jan 14
2
runs.test in by() statement
Hi everybody
I am a recent convert from SAS so please excuse me if this is all very
obvious:
I want to use the runs test {runs.test() in package tseries} to test the
randomness of a certain variable in a survey for each interviewer. I tried
to us the by() statement but it doesn't seem to work with runs.test() as the
function.
Here is what I have: Consider a data frame with two variables and
2009 Jun 10
2
isolating Hour and minute form date and time
Hi everybody. I have a dataframe that contains a factor with the date
information in the format like in the example below:
"2009/05/12 11:22:31 AM"
I have been able to convert it to POSIXt using strptime
Now I want to print only the date as one vector and the time in another
vector but they must be real date and time classes so that i can use them in
calculations
to reconstruct my
2013 Oct 16
1
Extract a predictors form constparty object (CHAID output) in R
I have a large dataset (questionnaire results) of mostly categorical
variables. I have tested for dependency between the variables using
chi-square test. There are an incomprehensible number of dependencies.
I used the chaid() function in the CHAID package to detect
interactions and separate out (what I hope to be) the underlying
structure of these dependencies for each variable. What typically
2011 Mar 14
1
Math characters in column heading using latex() in Hmisc
Hi Everybody
I want to print a latex table containing math characters in the column
heading
These are the formulae I want to use as column headings. It prints OK from
TeX
$\sum_{i}\sum_{j}C_{P,i,j,y}\times\mathit{FC}_{i}$, $XU_{alt,y}$, $n$,
$\bar{C}_{P,y}$
My plan was to create a character vector with these and later rbind the
values to them. When I create the vector like:
2009 Oct 07
1
merging dataframes with an unequal number of variables
Hallo Everyone
I have the kind of problem that one should never have because one must
always plan well and communicate with your team. But now I haven't so here
is my problem.
I have data coming in on a daily basis from surveys in 10 towns. The
questionnaire has 62 variables but some of the regions have used older
versions of the questionnaire that have a few variables less. I want to
combine
2010 Jun 08
2
duplicated() and unique() problems
Hi everybody
I have found something (for me at least) strange with duplicated(). I will
first provide a replicable example of a certain kind of behaviour that I
find odd and then give a sample of unexpected results from my own data. I
hope someone can help me understand this.
Consider the following
# this works as expected
ex=sample(1:20, replace=TRUE)
ex
duplicated(ex)
ex=sort(ex)
ex
2011 Jan 22
0
how to call BayesX in R to see the graph
...ease the maximum number of iterations. Which you tried to do, but
didn?t succeed in, as the above warnings shows. The argument is called
?iter.max?, not ?max.iter?.
--
Karl Ove Hufthammer
------------------------------
Message: 10
Date: Fri, 21 Jan 2011 14:26:26 +0200
From: christiaan pauw <cjpauw@gmail.com>
To: r-help@r-project.org
Subject: [R] User input in R program
Message-ID:
<AANLkTimZc98GJtTyJ2a6Pn-1v-Sd6vK4sv2BOkQsdppP@mail.gmail.com>
Content-Type: text/plain
HI Everybody
Does anyone know of documentation about different ways of obtaining user
input in R. I have use...
2009 Jun 17
0
vertical line in xtable
Hi everyone
I have created a function that uses xtable to print table of frequencies and
percentages with a heading and some sample information (the sample size and
missing values). The function and example data is below.
I want a vertical line that separates the results from the sample
information i.e. a vertical line on the bottom of the line second from last
2010 Jan 15
1
Sampling from a Postgres database
Hi Everybody
Is there a way in which one can use the RPostgreSQL package to take a sample
from a table in Postgres database without having to read the whole table
into R
regards
Christiaan
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2010 Jul 13
0
RJSONIO install problem
Hi everybody
I am trying to install RJSONIO from source in on Mac OS X 10.5.8. I used the
Package Installer.
The message and sessionInfo is attached below
Can someone help me to understand the error message and maybe give hint
towards solving the problem
thanks in advance
Christiaan
Message:
The downloaded packages are in
2009 Oct 20
1
RPgSQL installation problem
Hi everybody
I am trying to install RPsSQL and get the following error message:
When I do ./configure form the untarred source directory I get
loading cache ./config.cache
checking for crypt in -lcrypt... no
No crypt function found
When I use the Package installer in R I get
install.packages("/Users/christiaanpauw/tmp/RPgSQL/", , NULL, type =
"source")
Warning in
2009 Oct 27
0
Installing RPostgreSQL from source on Mac OS X
Hi Everybody
I use R2.9.2 on Mac OS X 10.5.2. I tried to install RPostgreSQL from source
on CRAN via the package installer. Apparently the program cannot find my C
compiler gcc . Here is the output message
trying URL '
http://cran.za.r-project.org/src/contrib/RPostgreSQL_0.1-6.tar.gz'
Content type 'application/x-gzip' length 141399 bytes (138 Kb)
opened URL
2011 May 30
0
Question of the XLConnect package
Hi Everybody
I have started to learn how to use the XLConnect package and I think it is
going to be very helpful to help me to operate between Excel users.
Is there a function that can export a dataframe to a Excel sheet and
automatically create a named region for every column (excluding the column
heading) that correspond to the column name? If this is possible one can
then also create formulae