Displaying 20 results from an estimated 30000 matches similar to: "Source awareness?"
2010 Jun 24
8
Install package automatically if not there?
Hi fans,
is it possible for a script to check if a library has been installed?
I want to automatically install it if it is missing to avoid scripts
to crash when running on a new machine...
Ralf
2010 Jul 29
2
Reset R environment through R command
Is it possible to remove all variables in the current environment
through a R command.
Here is what I want:
x <- 5
y < 10:20
reset()
print(x)
print(y)
Output should be NULL for x and y, and not 5 and 10:20.
Can one do that in R?
Best,
Ralf
2010 Mar 02
16
Three most useful R package
Hi R-fans,
I would like put out a question to all R users on this list and hope
it will create some feedback and discussion.
1) What are your 3 most useful R package? and
2) What R package do you still miss and why do you think it would make
a useful addition?
Pulling answers together for these questions will serve as a guide for
new users and help people who just want to get a hint where to
2010 Sep 21
5
Combined plot: Scatter + density plot
Hi,
in order to save space for a publication, it would be nice to have a
combined scatter and density plot similar to what is shows on
http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=78
I wonder if anybody perhaps has already developed code for this and is
willing to share. This is the reproducible code for the histogram
version obtained from the site:
def.par <-
2010 Oct 06
5
Create variable by name
Can one create a variable through a function by name
createVariable <- function(name) {
outputVariable = name
name <- NULL
}
after calling
createVariable("myVar")
I would like to have a variable myVar initialized with NULL in my
environment. Is this possible?
Ralf
2010 Aug 04
3
Output (graphics and table/text)
Hi R Users,
I need to produce a simple report consisting of some graphs and a
statistic. Here simplification of it:
# graphics output test
a <- c(1,3,2,1,4)
b <- c(2,1,1,1,2)
c <- c(4,7,2,4,5)
d <- rnorm(500)
e <- rnorm(600)
op <- par(mfrow=c(3,2))
pie(a)
pie(b)
pie(c)
text(ks.test(d,e))
obviously, the ks.test does not make it to the output. How can this be
archived by a)
2010 May 06
3
Intersection list
How can I create intersections of vectors?
a <- c(1,2,3)
b <- c(1,5,6)
the intersected list c should contain c(1)...
Ralf
2010 Jul 29
3
Statistical mailing list
I am looking for a mailing list for general statistical questions that
are not R related. Do you have any suggestions for lists that are busy
and helpful and/or lists that you use and recommend?
Thanks in advance,
Ralf
2010 Sep 22
3
Extracting bins and frequencies from frequency table
Dear R users,
I would like to great a frequency table from raw data and then access
the classes/bins and
their respective frequencies separately. Here the code to create the
frequency tables:
x1 <- c(1,5,1,1,2,2,3,4,5,3,2,3,6,4,3,8)
t1 <- table(x1)
print(t1[1])
Its easy to plot this, but how do I actually access the frequencies
alone and the bins alone?
Basically I am looking to get:
2010 Aug 04
4
Adding collumn to existing data frame
Hi experts,
I am trying to write a very flexible method that allows me to add a
new column to an existing data frame. This is what I have so far:
add.column <- function(df, new.col, name) {
n.row <- dim(df)[1]
length(new.col) <- n.row
names(new.col) <- name
return(cbind(df, new.col))
}
df <- NULL
df <- data.frame(a=c(1,2,3))
df
# corect: added NA to new collumn
df <-
2010 Jun 24
4
Simple qqplot question
I am a beginner in R, so please don't step on me if this is too
simple. I have two data sets datax and datay for which I created a
qqplot
qqplot(datax,datay)
but now I want a line that indicates the perfect match so that I can
see how much the plot diverts from the ideal. This ideal however is
not normal, so I think qqnorm and qqline cannot be applied.
Perhaps you can help?
Ralf
2010 Jul 09
3
Non-parametric regression
I have two data sets, each a vector of 1000 numbers, each vector
representing a distribution (i.e. 1000 numbers each of which
representing a frequency at one point on a scale between 1 and 1000).
For similfication, here an short version with only 5 points.
a <- c(8,10,8,12,4)
b <- c(7,11,8,10,5)
Leaving the obvious discussion about causality aside fro a moment, I
would like to see how
2010 May 11
3
Smoothing Techniques - short stepwise functions with spikes
R Friends,
I have data from which I would like to learn a more general
(smoothened) trend by applying data smoothing methods. Data points
follow a positive stepwise function.
| x
x
| xxxxxxxx xxxxxxxx
| x x
|xxxx xxx xxxx
| xxxxxxxxxxxxxxxxx
|
|
2010 Jul 05
1
Profiler for R ? (HFWUtils package)
> Message: 21
> Date: Mon, 5 Jul 2010 02:26:29 -0400
> From: Ralf B <ralf.bierig at gmail.com>
> To: "r-help at r-project.org" <r-help at r-project.org>
> Subject: [R] Profiler for R ?
>
> Hi,
>
> is there such a thing as a profiler for R that informs about a) how
> much processing time is used by particular functions and commands and
> b) how
2010 May 08
2
Machine Learning and R
Hi all,
I am looking for a good book that covers Machine Learning as a whole
and provides examples in R while not over focusing on the math (such
as in 'Elements of Statistical Learning') but rather on descriptions
and examples. I am relatively new to R and ML and, while solving
problems with R, I want to learn the main concepts, techniques and
problem categories. Can anybody here
2010 Sep 23
3
Length of vector without NA's
Hi,
this following code:
x<-c(1,2,NA)
length(x)
returns 3, correctly counting numbers as well as NA's. How can I
exclude NA's from this count?
Ralf
2010 Jul 09
3
Plotting text in existing plot?
I would like to plot some text in a existing plot graph. Is there a
very simple way to do that. It does not need to be pretty at all (just
maybe a way to center it or define a position within the plot). ( ? )
Ralf
2010 Jul 11
2
Fast string comparison
What is the fastest way to compare two strings in R?
Ralf
2010 Nov 08
2
Rserve alternative?
The Rserve documentation at
http://rosuda.org/Rserve/doc.shtml#start
states that even when making multiple connections to the Rserve,
Windows won't separate workspaces physically and share environments,
which will obviously cause problems and should therefore not be used.
Are there any alternatives for the windows platform?
Ralf
2010 Sep 27
2
rimage package problems
Hi all,
I tried to install the rimage in order to get to the function
?read.jpeg. However, I get this error, independent what mirror I
choose:
install.packages("rimage")
--- Please select a CRAN mirror for use in this session ---
Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
package ?rimage? is not available
>
Does anybody know what happend with the