Displaying 20 results from an estimated 1100 matches similar to: "How to get an argument dynamically from a list?"
2008 Jun 29
1
creating a dataframe using a list of the variable names
Hello,
I'm fairly new to R, and despite spending quite some time exploring, testing, and looking for answers, I still have a couple of questions remaining...
The first one is about creating a dataframe using a list of the variable names .
I get this output file from a database:
BOB <- c('A/A', 'C/C', '15/27')
MARY <- c('A/A', NA, '13/12')
JOHN
2008 Jul 08
2
attributing values to dataframe positions following eval
Hi everybody,
I've been looking around, but can't seem to find the answer.
I get a list of names (which vary, so I never know them in advance), and
transform them into variables, each of which is a dataframe, using
assign:
polyList <- c("rs123", "rs124", "rs555", "rs000")
numPoly <- length(polyList)
for (k in 1:numPoly) {
2006 Jan 07
1
maptools, write.polylistShape
Dear Roger,
I am trying to use the write.polylistShape() function of maptools for
the first time and realize that it handles list of polygons of class
'polylist'. However, it seems that no as.polylist() function exist in
the package. The question behind that is: in your opinion, which would
be the best way to convert a list of matrix of polygon nodes
coordinates into an object of
2006 Dec 30
1
plot methods in sp
Dear listers,
I am working since a while with the sp package and still wonder how the
plot methods are managed with sp spatial objects. For instance,
SpatialPolygonsDataFrame objects have obviously a plot method. However
it cannot be found in the list provided by methods(plot) . Furthermore
?plot.SpatialPolygonsDataFrame, nor ?plot.SpatialPolygons, etc.. provide
a help, though the lattice
2009 Feb 19
2
read.table : how to condition on error while opening file?
Hi,
I'm using read.table in a loop, to read in multiple files. The problem
is that when a file is missing there is an error message and the loop is
broken; what I'd like to do is to test for the error and simply do
"next" instead of breaking the loop. Anybody knows how to do that?
Example:
filelist <- c("file1.txt", "file2.txt",
2010 Feb 28
1
Combining 2 columns into 1 column many times in a very large dataset
*Combining 2 columns into 1 column many times in a very large dataset*
The clumsy solutions I am working on are not going to be very fast if I can
get them to work and the true dataset is ~1500 X 45000 so they need to be
efficient. I've searched the R help files and the archives for this list and
have some possible workable solutions for 2) and 3) but not my question 1).
However, I include
2004 Apr 05
1
Drawing maps in R?
What tools and documentation exist for producing maps and working
with polygon and polylist objects in R beyond the following:
* Packages maps, mapproj, maptools, and mapdata.
* Becker and Wilks (1993, 1995), listed as references in the
documentation on the "map" function.
Thanks,
Spencer Graves
2006 Nov 23
0
[754] trunk/wxruby2/samples/bigdemo: Rubified samples and added in missing client data sample code
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><style type="text/css"><!--
#msg dl { border: 1px #006 solid; background: #369; padding:
2005 Feb 09
1
FW: Drawing maps of UK
Hi Guys
Thanks for this! As I am a beginner, I bet I'm running into some really
basic problems. Using the example from the Map2poly function in
maptools:
try <- read.shape("euadmll.shp")
mappolys <- Map2poly(try)
# this produces 14 warnings() of the type:
# 1: level 2 circularity at 62 in: .mtlbuild(.mtafters(r1), rD) # etc #
14: From next release, default hole handling
2010 Mar 15
1
map2poly - map lat/long cannot be unconstrained?
Using the maptools function "map2poly" I have created a map/polylist object
- a map of the Great Lakes. My goal is to passively plot additional data on
this map. Unfortunately I am not able to change (distort) the relative scale
of the axes for the map, and so the sample points do not line up correctly
on the map.
In the code below, notice that I have set the same axis ranges on each
2007 Sep 17
1
map issues
Hi !
I have a shapefile that I can easily read into R using library(maptools). My problem stems from some warning messages that come even though everything seems to work fine.
library(maptools)
districts <- read.shape(filen = "a_ds", dbf.data = TRUE)
length(districts$Shapes)
so far so good. when I try and plot this I get a nice plot and a warning message:
> plot(districts)
2009 Feb 08
0
recursive derivative a list of polynomials
Dear list,
This is quite a specific question requiring the package orthopolynom.
This package provides a nice implementation of the Legendre
polynomials, however I need the associated Legendre polynomial which
can be readily expressed in terms of the mth order derivative of the
corresponding Legendre polynomial. (For the curious, I'm trying to
calculate spherical harmonics [*]).
2004 Nov 22
1
plot.Map Maptools
Hi,
Is there any way to plot a Map with different shading patterns, instead
of color intensity, in R2.0.1 over Linux ?
Thanks.
D
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2004 Sep 22
2
dot density maps
Dear All,
In the moment i'm using the map and maptools package to read shapefiles
and display the maps.
I'm looking for the possibility to draw points (randomly positioned or
positioned according to a grid) into the polygons instead of filling the
polygons with colors.
For example:
a map (shapefile) with 10 countries, 15 points in the polygon of country
A, 20 points in the
2003 Dec 01
1
Re: using shapefile as owin
My sincerest apologies, as this is a very elementary problem, but I have
searched through archives and FAQs and on the web, and I am at the end of my
own resources.
I need to do analysis of a spatial point process occuring with four
counties, using spatstat. I've had no trouble importing the shapefiles, but
I can't seem to figure out what I need to do in order to use the boundary as
an
2006 Aug 25
1
wxCheckListBox.rbw patch file
This fixes truncated text on the CheckListBox sample in bigdemo.
Roy
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2011 Sep 15
1
Creando scrips en R
Hola queridos usuarios de R-HELP-ES
Primero que nada, muchas gracias a todo aquellos que me prestaron ayuda en mi anterior pregunta, fue de gran utilidad.
A lo siguiente, tengo ahora otras preguntas, que bajo mis conocimientos las considero complejas, espero que me puedan ayudar, se los agradezco de antemano. Necesito realizar las siguientes operaciones (#Operación general) a un conjunto de 18
2005 Aug 19
1
Weird series of errors with dovecot-stable
I'm using the dovecot-stable from 7/30, authenticating against an
OpenLDAP server. From time to time, dovecot stops responding to new
queries. It seems to be a self-correcting problem, lasting about 20
minutes.
Here's how it starts:
Aug 18 19:38:23 cliff dovecot: imap-login: Disconnected: Inactivity
[150.253.42.12]
Aug 18 19:38:36 cliff dovecot: pop3-login: Disconnected: Inactivity
2006 Oct 07
3
merge and polylist
Greetings:
I would like to kindly ask for a little help. The rough code is:
#________________________________________________________
dat=data.frame(read.delim(file="all.txt", header = TRUE, sep = "\t",
quote="\"", dec=".",na.strings = "NA"))
nc=read.shape("astae.shp", dbf.data=TRUE, verbose=TRUE)
mappolys=Map2poly(nc)
submap
2006 Nov 23
0
[752] trunk/wxruby2: Fix for Bug #6810: ListBox#get_selections should return an array of selections
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><style type="text/css"><!--
#msg dl { border: 1px #006 solid; background: #369; padding: