Folks:
I was wondering if you all would suggest some helpful RStudio
configurations that make recording a session via e.g. zoom the most useful
for students doing remote learning. Thoughts?
--j
--
Jonathan A. Greenberg, PhD
Randall Endowed Professor and Associate Professor of Remote Sensing
Folks:
Consider the following two use cases:
goodfunction <- function()
{
stop("Something went wrong..."
}
# vs.
badfunction <- function()
{
notgood()
}
Is there a way for me to test if the functions make use of a stop()
statement WITHOUT modifying the stop() output (assume I can't mod the
Folks:
Is there an easy function to open a finder window (on mac) or windows
explorer window (on windows) given an input folder? A lot of times I want
to be able to see via a file browser my working directory. Is there a good
R hack to do this?
--j
[[alternative HTML version deleted]]
R-helpers:
I'm trying to determine the frequency of characters for a matrix
applied to a single dimension, and generate a matrix as an output.
I've come up with a solution, but it appears inelegant -- I was
wondering if there is an easier way to accomplish this task:
# Create a matrix of factors
R-helpers:
I posted a message to the statet listserv, but I thought I'd ask here
as well since it is one of the major R developer environments-- has
anyone gotten the StatET plugin for Eclipse working with R 3.1.0 yet?
Any tricks? I did manage to get rj updated to 2.0 via:
#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---
Sent from my phone. Please excuse my brevity.
On April 8, 2014 8:00:03 AM PDT, Jonathan Greenberg j...@illinois.edu wrote:
R-helpers
R-helpers:
One of the minor irritations I have is copying paths from Windows
explorer, which look like:
C:\Program Files\R\R-3.0.3
and using them in a setwd() statement, since the \ is, of course,
interpreted as an escape character. I have to, at present, manually
add in the double slashes or
R-helpers:
Hopefully this is an easy one. Given a lookup table:
mylevels - data.frame(ID=1:10,code=letters[1:10])
And a set of values (note these do not completely cover the mylevels range):
values - c(1,2,5,5,10)
How do I convert values to a factor object, using the mylevels to
define the
through the rest of the session and could be
source()-ed in further sessions.
--
David.
On Mar 16, 2014, at 2:09 PM, Jonathan Greenberg wrote:
R-helpers:
I'm having some trouble with this one -- I figure because I'm a bit of
a noob with S3 classes... Here's my challenge: I want
R-helpers:
I'm having some trouble with this one -- I figure because I'm a bit of
a noob with S3 classes... Here's my challenge: I want to write a
custom predict statement that is triggered based on the presence and
class of a *newdata* parameter (not the object parameter). The
reason is I am
R-helpers:
I was curious if anyone developed a package/approach to installing
packages directly from the R-forge SVN subsystem (rather than waiting
for it to build)? I can, of course, SVN it command line but I was
hoping for an install.packages(svn://) sort of approach. Cheers!
--j
--
R-helpers:
I'm guessing this is an easy one for some of you, but I'm a bit
stumped. Given some arbitrary function (doesn't matter what it does):
myfunction - function(a,b,c)
{
return(a+b+c)
}
I want to test this function for the presence of the ellipses (...)
and, if they are missing, create a
)))
options(survey.multicore = FALSE)
if (is.null(getOption(survey.replicates.mse)))
options(survey.replicates.mse = FALSE)
}
environment: namespace:survey
On Sat, Jun 1, 2013 at 4:01 PM, Jonathan Greenberg j...@illinois.eduwrote:
R-helpers:
Say I'm developing a package that has a set
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf
Of William Dunlap
Sent: Friday, September 27, 2013 12:56 PM
To: Jonathan Greenberg; r-help
Subject: Re: [R] Error: C stack usage is too close to the limit when using
list.files()
Do
R-helpers:
I'm running a file search on my entire drive (Mac OS X) using:
files_found -
list.files(dir=/,pattern=somepattern,recursive=TRUE,full.names=TRUE)
where somepattern is a search pattern (which I have confirmed via a
unix find / -name somepattern only returns ~ 3 results).
I keep
...
On Fri, Sep 27, 2013 at 2:36 PM, Ben Bolker bbol...@gmail.com wrote:
Jonathan Greenberg jgrn at illinois.edu writes:
R-helpers:
I'm running a file search on my entire drive (Mac OS X) using:
files_found -
list.files(dir=/,pattern=somepattern,recursive=TRUE,full.names=TRUE)
where
In the last week, SOMETHING on my system must have changed because
when trying to library() or install.packages() on R 3.0.1 x64 on a
Windows 2008 R2 server:
library(raster)
Error in normalizePath(path.expand(path), winslash, mustWork) :
path[1]=D:/Users/[UID]/Documents/R/win-library/3.0:
R-helpers:
One of my intrepid students came up with a solution to a problem where
they need to write a function that takes a vector x and a scalar d,
and return the indices of the vector x where x %% d is equal to 0 (x
is evenly divisible by d). I thought I had a good handle on the
potential
For matrices, colMeans/rowMeans are quick, vectorized functions. But
say I have a higher dimensional array:
moo - array(runif(400*9*3),dim=c(400,9,3))
And I want to get the mean along the 2nd dimension. I can, of course,
use apply:
moo1 - apply(moo,c(1,3),mean)
But this is not a vectorized
Folks:
I apologize for the cross-posting between r-help and r-sig-hpc, but I
figured this question was relevant to both lists. I'm writing a
function to be applied to an input dataset that will be broken up into
chunks for memory management reasons and for parallel execution. I am
trying to
, Jonathan Greenberg j...@illinois.edu
wrote:
Folks:
I apologize for the cross-posting between r-help and r-sig-hpc, but I
figured this question was relevant to both lists. I'm writing a
function to be applied to an input dataset that will be broken up into
chunks for memory management reasons
: namespace:survey
On Sat, Jun 1, 2013 at 4:01 PM, Jonathan Greenberg j...@illinois.edu
wrote:
R-helpers:
Say I'm developing a package that has a set of user-definable options
that
I would like to be persistent across R-invocations (they are saved
someplace). Of course, I can
R-helpers:
Say I'm developing a package that has a set of user-definable options that
I would like to be persistent across R-invocations (they are saved
someplace). Of course, I can create a little text file to be written/read,
but I was wondering if there is an officially sanctioned way to do
R-helpers:
I'm trying to retrieve the contents of a directory from an ftp site
(ideally, the file/folder names as a character vector):
ftp://e4ftl01.cr.usgs.gov/MOTA/MCD12C1.005/;
# (MODIS data)
Where I get the following error via RCurl:
require(RCurl)
url -
Roger:
Doh! Just realized I had that error in the code -- raw_data is the same as
mydata, so it should be:
mydata - read.csv(singular.csv)
plot(mydata$predictor,mydata$response)
# A big cloud of points, nothing too weird
summary(mydata)
# No NAs:
# Xresponse predictor
Quantreggers:
I'm trying to run rq() on a dataset I posted at:
https://docs.google.com/file/d/0B8Kij67bij_ASUpfcmJ4LTFEUUk/edit?usp=sharing
(it's a 1500kb csv file named singular.csv) and am getting the following
error:
mydata - read.csv(singular.csv)
fit_spl - rq(raw_data[,1] ~
Given an arbitrary set of character vectors:
myvect1 - c(abc,3,4)
myvect2 - c(2,3,4)
I would like to develop a function that will convert any vectors that can
be PROPERLY converted to a numeric (myvect2) into a numeric, but leaves
character vectors which cannot be converted (myvect1) alone. Is
Yep, type.convert was exactly what I was looking for (with as.is=TRUE).
Thanks!
On Thu, Mar 21, 2013 at 1:31 PM, Prof Brian Ripley rip...@stats.ox.ac.ukwrote:
On 21/03/2013 18:20, Jonathan Greenberg wrote:
Given an arbitrary set of character vectors:
myvect1 - c(abc,3,4)
myvect2 - c
,
Rui Barradas
Em 01-02-2013 22:24, Jonathan Greenberg escreveu:
R-helpers:
Say I have a list:
myvariables - list(a=1:10,b=20)
Is there a way to load the list components into the environment as
variables based on the component names? i.e. by applying this theoretical
function
R-helpers:
Say I have a list:
myvariables - list(a=1:10,b=20)
Is there a way to load the list components into the environment as
variables based on the component names? i.e. by applying this theoretical
function to myvariables I would have the variables a and b loaded into the
environment
-
project.org] On Behalf Of Jonathan Greenberg
Sent: Tuesday, January 22, 2013 11:42 PM
To: r-help
Subject: [R] Adding a line to barchart
R-helpers:
I need a quick help with the following graph (I'm a lattice newbie):
require(lattice)
npp=1:5
names(npp)=c(A,B,C,D,E)
barchart
R-helpers:
I need a quick help with the following graph (I'm a lattice newbie):
require(lattice)
npp=1:5
names(npp)=c(A,B,C,D,E)
barchart(npp,origin=0,box.width=1)
# What I want to do, is add a single vertical line positioned at x = 2 that
lays over the bars (say, using a dotted line). How do
Folks:
Say I have a set of histogram breaks:
breaks=c(1:10,15)
# With bin ids:
bin_ids=1:(length(breaks)-1)
# and some data (note that some of it falls outside the breaks:
data=runif(min=1,max=20,n=100)
***
What is the MOST EFFICIENT way to classify data into the histogram bins
(return the
R-helpers:
I'm sure this question has been asked and answered through the ages, but
given there are some new textbooks out there, I wanted to re-pose it. For
a course that will cover the application of R for general computing and
spatial modeling, what textbook would be best to introduce
The code base is a bit too complicated to paste in here, but the gist of my
question is this: given I have a function
myfunction - function(x)
{
# Do something A
# Do something B
# Do something C
}
Say #Do something B returns this error:
Error in cat(list(...), file, sep, fill, labels, append) :
1Kb in size.
Hope this helps,
Rui Barradas
Em 27-09-2012 20:17, Jonathan Greenberg escreveu:
Folks:
Asked this question some time ago, and found what appeared (at first) to be
the best solution, but I'm now finding a new problem. First off, it seemed
like ff as Jens suggested worked
the
filesystem can handle). However, length appears to be restricted
by .Machine$integer.max (I'm on a 64-bit windows box):
.Machine$integer.max
[1] 2147483647
Any suggestions on how to solve this problem for much larger file sizes?
--j
On Thu, May 3, 2012 at 10:44 AM, Jonathan Greenberg j
R-folks: Sorry for the cross-posting, but I wanted to share a link to
a (fairly long) blog post I created which tries to take the mystery
out of getting R setup for doing high performance/parallel computing
if you have to compile R from scratch:
R-folks. Sorry for the cross-posting, but I wanted to share a link to
a (fairly long) blog post I created which tries to take the mystery
out of getting R setup for doing high performance/parallel computing
if you have to compile R from scratch:
()
*Gesendet:* Donnerstag, 03. Mai 2012 um 00:23 Uhr
*Von:* Jonathan Greenberg j...@illinois.edu
*An:* r-help r-help@r-project.org, r-sig-...@r-project.org
*Betreff:* [R-sig-hpc] Quickest way to make a large empty file on disk?
R-helpers:
What would be the absolute fastest way to make a large empty file
R-helpers:
What would be the absolute fastest way to make a large empty file (e.g.
filled with all zeroes) on disk, given a byte size and a given number
number of empty values. I know I can use writeBin, but the object in
this case may be far too large to store in main memory. I'm asking
, Jonathan Greenberg wrote:
Thanks all (particularly to you, Berend) -- I'll push forward with these
solutions and integrate them into my code. I did come across geigen while
rooting around in the CCA code but its not formally documented (it just
says for internal use or something along those
Thanks all (particularly to you, Berend) -- I'll push forward with these
solutions and integrate them into my code. I did come across geigen while
rooting around in the CCA code but its not formally documented (it just
says for internal use or something along those lines) and as you found
out
int* ldvl,
double* vr, const int* ldvr,
double* work, const int* lwork, int* info);
Any ideas?
--j
On Fri, Apr 20, 2012 at 1:37 AM, Berend Hasselman b...@xs4all.nl wrote:
On 19-04-2012, at 20:50, Jonathan Greenberg wrote:
Folks:
I'm trying to port some code from python over to R
)
LAPACK's documentation is:
http://www.netlib.org/lapack/double/dggev.f
--j
On Fri, Apr 20, 2012 at 11:58 AM, Jonathan Greenberg j...@illinois.eduwrote:
So I am a complete noob at doing this type of linking. When I write this
statement (all the input values are assigned, but I have to confess I
$GENEIGENVALUES=(Rdggev_out$ALPHAR+Rdggev_out$ALPHAI)/Rdggev_out$BETA
return(Rdggev_out)
}
On Fri, Apr 20, 2012 at 12:01 PM, Jonathan Greenberg j...@illinois.eduwrote:
Incidentally, if you want to test this out:
A
[,1] [,2] [,3]
[1,] 1457.738 1053.181 1256.953
[2,] 1053.181
My apologies:
When reviewing my initial email I made a typo -- what I needed was dggev,
not dgeev. I have confirmed that my function reproduces the scipy outputs
I mentioned in my first email. The function is part of lapack. I'm not an
R noob, I just haven't dealt with external Fortran or C
Folks:
I'm trying to port some code from python over to R, and I'm running into a
wall finding R code that can solve a generalized eigenvalue problem
following this function model:
http://docs.scipy.org/doc/scipy/reference/generated/scipy.linalg.eig.html
Any ideas? I don't want to call python
R-helpers:
I'd like to be able to store all the file information from an ftp site
(e.g. file and foldernames) through an R command. Any ideas how to do
this? Here's an example site to use:
ftp://e4ftl01.cr.usgs.gov/MOTA/MCD15A3.005
--j
--
Jonathan A. Greenberg, PhD
Assistant Professor
wrote:
A couple of ways.
using Rcurl you can use the curlOption of dirlistonly.
otherwise you can read the page and parse. I've got some code around here
to do that.
Steve
On Mon, Apr 9, 2012 at 11:27 AM, Jonathan Greenberg j...@illinois.edu
wrote:
R-helpers:
I'd like to be able
:45 PM, steven mosher mosherste...@gmail.com wrote:
Ya I hit the same error with my code that reads directories.
I'll try some other stuff . I think I hit this error before I with usgs.
On Mon, Apr 9, 2012 at 11:40 AM, Jonathan Greenberg j...@illinois.edu
wrote:
Steven:
Thanks -- I seem
R-helpers:
It looks like http://finzi.psych.upenn.edu/search.html has stopped
spidering the mailing lists -- this used to be my go-to site for
searching for R solutions. Are there any good replacements for this?
I want to be able to search both functions and mailing lists at the
same time.
R-helpers:
I'm curious what support R has for parallel writes to a binary file?
If I want to use snow to have each node write different rows of a
flat binary file (possibly out of sequence), are there any
tricks/issues I should be aware of?
--j
--
Jonathan A. Greenberg, PhD
Assistant Professor
R-helpers:
I'm trying to install a package from r-forge, and I'm wondering if
there is a way to force R to install a package, even if the package
requires a certain version of R (short of modifying the DESCRIPTION
file)? Cheers!
--j
--
Jonathan A. Greenberg, PhD
Assistant Professor
Department
wrote:
On 30/03/2012 12:05 PM, Jonathan Greenberg wrote:
R-helpers:
I'm trying to install a package from r-forge, and I'm wondering if
there is a way to force R to install a package, even if the package
requires a certain version of R (short of modifying the DESCRIPTION
file)? Cheers!
You
R-helpers:
Say I have two lists of arbitrary elements, e.g.:
list1=list(c(1:3),R is fun!,c(3:6))
list2=list(c(10:5),c(5:3),c(13,5),I am so confused)
I would like to produce a single new list that is composed of all
combinations of the top level of list1 and list2, e.g.:
This is probably a very noobish question, but if I want to create a
function that allows an undetermined number of, say, numeric vectors to be
fed to it, I would use:
myfunction = function(...)
{
# Do something
}
Right? If so, how do I a) count the number of vectors fed to the
function, and b)
This is a follow-up to a question I asked a few years back. We have a pair
of computers that share a common home directory (and therefor a common
.Renviron) with identical hardware, but very different sets of libraries
such that using a shared R_LIBS between two computers does not work.
They
R-helpers:
I'm trying to build a package, but I'm a bit new to the whole S3/S4
methods concept. I'm trying to add a new definition of the zoo
function as.yearmon, but I'm getting the following error when it
gets to this point during a package install:
***
R CMD INSTALL STARStools
* installing
it if you change the function arguments).
Kevin Wright
On Tue, Aug 23, 2011 at 6:55 PM, Jonathan Greenberg greenb...@ucdavis.edu
wrote:
R-helpers:
Are there any ways to auto-generate R-friendly (e.g. will pass a
compilation check) .Rd files given a set of .R code? How about GUIs
that help
(as.yearmon,
signature(x = SpatialPointsDataFrameListZoo),
as.yearmon.SpatialPointsDataFrameListZoo
)
--j
2011/8/24 Uwe Ligges lig...@statistik.tu-dortmund.de:
On 24.08.2011 10:30, Jonathan Greenberg wrote:
R-helpers:
I'm trying to build a package, but I'm a bit new to the whole S3/S4
R-helpers:
Are there any ways to auto-generate R-friendly (e.g. will pass a
compilation check) .Rd files given a set of .R code? How about GUIs
that help properly format the .Rd files? Thanks! I want a basic set
of .Rd files that I can update as I go, but as with most things my
documentation
Folks:
I'm putting together an R package, and I was wondering where,
specifically, I put both class definitions (via setClass) as well as
setMethod calls? Is there a particular file name I need to use?
Thanks!
--j
--
Jonathan A. Greenberg, PhD
Assistant Project Scientist
Center for Spatial
Answered my own question. ?split
Never mind!
--j
On Wed, Aug 10, 2011 at 7:35 PM, Jonathan Greenberg
greenb...@ucdavis.edu wrote:
R-helpers:
Is there an easy way to transfer a data frame to a list, where each
list element is a dataframe containing a single row from the original
data frame
R-helpers:
Is there an easy way to transfer a data frame to a list, where each
list element is a dataframe containing a single row from the original
data frame?
--j
--
Jonathan A. Greenberg, PhD
Assistant Project Scientist
Center for Spatial Technologies and Remote Sensing (CSTARS)
Department
I'm hoping this is an easy problem that I'm missing something obvious. Given:
x=c(1,1,1,2,2,3,3,3)
y=c(1:length(x))
dataframe=data.frame(x,y)
I would like to convert this to a list for use with certain functions,
where each entry of the list is a subsetted dataframe based on
dataframe$x
I can
Center
223 East Steinfest Road
Antigo, WI 54409 USA
From: Jonathan Greenberg j...@illinois.edu To: r-help
r-help@r-project.org Date: 07/28/2011 03:22 PM Subject:
[R] Data frame to list
Sent by: r-help-boun...@r-project.org
--
I'm hoping this is an easy problem
, Jun 28, 2011 at 11:05 PM, Berend Hasselman b...@xs4all.nl wrote:
Jonathan Greenberg wrote:
The problem is that I'm trying to create a path to use with a system()
call, and the command window will not work with the forward slash,
only with the standard backslash. I do understand that within R
Hopefully this is a pretty easy fix -- I need to have R query the path
separator for some code I'm trying to write (it involves using a
system() call) -- the call requires a path and a wildcard, e.g.:
command=mycommand /path/to/*.files in the case of unix or,
command=mycommand.exe
is Windows (in which case use \)
or other (in which case use /) -- there isn't a more clever way of
doing this?
--j
On Tue, Jun 28, 2011 at 7:10 PM, Henrik Bengtsson h...@biostat.ucsf.edu wrote:
See file.path().
/Henrik
On Tue, Jun 28, 2011 at 6:59 PM, Jonathan Greenberg
greenb...@ucdavis.edu
---
Sent from my phone. Please excuse my brevity.
Jonathan Greenberg greenb...@ucdavis.edu wrote:
Thanks Henrik, but as the help for this function states:
Note
The components are separated by / (not \) on Windows.
, the slashes it uses are incorrect for use
R-helpers:
If I want to pass a character name of a function TO a function, and then
have that function executed, how would I do this? I want
an arbitrary version of the following, where any function can be used (e.g.
I don't want the if-then statement here):
apply_some_function -
Oops, small typo, should be:
barchart_test_heights=sin(c(1:100))
barchart_test_bins=c(c(1:50),c(1:50))
groups=c(rep(1,50),rep(2,50))
# Wish below didn't have spaces!
barchart(barchart_test_bins~barchart_test_heights,groups=groups)
On Wed, Aug 25, 2010 at 4:46 PM, Jonathan Greenberg
greenb
another function if that makes this easier.
On Wed, Aug 25, 2010 at 1:55 PM, David Winsemius dwinsem...@comcast.net wrote:
On Aug 24, 2010, at 10:20 PM, Jonathan Greenberg wrote:
Rhelpers:
I'm trying to make a barchart of a 2-group dataset
(barchart(x~y,data=data,groups=z,horizontal=FALSE
Rhelpers:
I'm trying to make a barchart of a 2-group dataset
(barchart(x~y,data=data,groups=z,horizontal=FALSE)). My problem is
that I can't, for the life of me, seem to get rid of the inter-bar
space -- box.ratio set to 1 doesn't do much. Any ideas? I'd
ideally want zero space between the
Rhelpers:
How do I get R to evaluate a string, as if it was an R statement, e.g.:
a=3
b=2
operator=-
statement_string=paste(a,operator,b,sep=)
--j
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the
Folks:
I have two sets of dates, and one set of data:
***
require(chron)
require(zoo)
reference_dates=seq.dates(01/01/92, 12/31/92, by = months)
data_dates=seq.dates(01/15/91, 12/15/93, by = months)
data=1:length(data_dates)
reference_zoo=zoo(order.by=reference_dates)
Pardon the barrage of time series related questions, but another issue
I'm trying to solve is how to determine a sequence of dates a la
seq.dates() except going BACKWARDS in time, e.g. if seq.dates()
allowed for the to variables to be set alone, rather than the from=.
Ultimately, I'd like to have
, Jonathan Greenberg
greenb...@ucdavis.edu wrote:
I'm a bit confused about how exists() work within a function -- I want
to test for unassigned variables, but I'm doing tests in the main
environment to figure out the function, so the variables DO exist in
the parent environment of a function call
I'm a bit confused about how exists() work within a function -- I want
to test for unassigned variables, but I'm doing tests in the main
environment to figure out the function, so the variables DO exist in
the parent environment of a function call.
Why does:
myfunction -
I'm trying to use RSQLite statement to cycle through a large database
in chunks via the fetch(...,n=2). As far as I can tell,
however, it keeps re-fetching the same beginning set of rows -- any
ideas what might be wrong with the following code? The select
statement is pulling from multiple
Folks:
Say I have a matrix:
test=matrix(c(1,2,3),nrow=10,ncol=3)
I would like to have an output character vector where each line is
row's values delimited by commas, e.g.:
1,2,3
2,3,1
3,1,2
...
1,2,3
What is the fastest way of doing this? I can paste() row-by-row but
this seems an
= as.vector(my_matrix)
)
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Jonathan Greenberg
Sent: Tuesday, 8 June 2010 12:34 PM
To: r-help
Subject: [R] Matrix to database -- best practices/efficiency?
I have a matrix
I have a matrix of, say, M and N dimensions:
my_matrix=matrix(c(1:60),nrow=6,ncol=10)
I have two id vectors corresponding to the rows and columns, e.g.:
id_m=seq(10,60,by=10)
id_n=seq(100,1000,by=100)
I would like to create a proper database (let's say a data.frame for
this example -- i'm
-core machine, you will see
CPU usage of nearly 400%. Note though that this will not discriminate
ATLAS from other multi-threaded BLASes.
HTH,
Peter
On Wed, May 26, 2010 at 2:16 PM, Jonathan Greenberg
greenb...@ucdavis.edu wrote:
Rhelpers:
I recently installed the 64-bit version of R
Rhelpers:
I recently installed the 64-bit version of R on my Debian system, and
afterwards was asked if it was compiled using ATLAS. Is there a way
to test to see if R is using ATLAS?
--j
__
R-help@r-project.org mailing list
Rhelpers:
I'm curious what the appropriate analysis to use for testing the
hypothesis that two histograms are statistically different from one
another? Thanks!
--j
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Rhelpers:
(Thanks for the previous help with getting a where statement
working). Now on to my next question -- our database guru has asked
me to run .schema on an sqlite database, and I was wondering if
there is an equivalent in R to do this? Thanks!
--j
Rhelpers:
I'd like to modify this RSQLite statement:
rs_stations-dbSendQuery(con_stations, select * from stations)
so that stations is actually an R variable, e.g.:
stations=c(stationA,stationB)
How would I modify the above statement to query from stations[[1]]
(aka stationA)?
--j
I'm having a mixed experience with using R and UNIX's screen function
-- sometimes when I close a connection that used screen, the R process
is killed (which, in theory, it shouldn't be -- it should be running
in the background). Does anyone have any ideas on how well (or not) R
behaves with
Rhelpers:
Having a problem solving this. I have an xyplot call that looks
like this:
print(xyplot(temp_species_EAM_Pred_Pop$x+temp_species_NULL_Pred_Pop$x~temp_species_EAM_Pred_Pop$Action,main=current_species,
xlab=Action,ylab=Predicted Pop,
I'm hoping to get some best practice feedback for constructing a
function call which takes an undefined set of DIFFERENT length vectors
-- e.g. say we have two lists:
list1=c(1:10)
list2=c(2:4)
lists = data.frame(list1,list2) coerces those two to be the same length
(recycling list2 to fill
I'm trying to figure out the best way to do a scatterplot using the
following data as an example:
plothelp_x=1:10
plothelp_A1=sin(plothelp_x)
plothelp_A2=tan(plothelp_x)
plothelp_B=c(A,B,C,A,B,C,A,B,C,A)
(note that all 4 of these vectors have 10 entries each)
What I would like is to have two
I got that same email from Steve Blum:
Hi folks,
Which is the best statistical package out there. I am out of work and looking to get the best buck for my money.
Tx - ed
--j
Max Kuhn wrote:
... and this one I received this morning:
Hi folks, Which is the best statistical package
R-helpers:
I'm working on an r-package that I want to make as easy-to-use as
possible for a novice R-user, which includes automatically installing
required packages. I, myself, am a novice R-packager, so the solution
I came up with was to embed:
print(Loading required packages...)
if
R-helpers:
I have a data frame containing 4 factor variables (let's say A,B,C,
and D) and 1 numerical variable (N). I would like to produce a
cross-tabulated data frame in which A,B,C are individual columns, each
factor of D is its own column, and the field is calculated as a given
Quick question -- if I have a vector of strings that I'd like to split
into two new vectors based on a substring that is inside of each string,
what is the most efficient way to do this? The substring that I want to
split on is multiple characters, if that matters, and it is contained in
:
-Original Message-
From: r-help-boun...@r-project.org
[mailto:r-help-boun...@r-project.org] On Behalf Of Jonathan Greenberg
Sent: Thursday, October 22, 2009 7:35 PM
To: r-help
Subject: [R] splitting a vector of strings...
Quick question -- if I have a vector of strings that I'd like
to split
(apologies for the cross-posting, and for this being a more general
stats question rather than a specific-to-R one. I assure you I will be
doing the actual analysis in R :)
I am trying to determine the distribution and variance for a classic
stochastic (transition) matrix problem such that:
Quick informal poll: what is everyone's favorite text editor for working
with R? I'd like to hear from people who are using editors that have
some level of direct R interface (e.g. Tinn-R, Komodo+SciViews). Thanks!
--j
--
Jonathan A. Greenberg, PhD
Postdoctoral Scholar
Center for Spatial
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