On Fri, 23 Sep 2011, hi_ono2...@ybb.ne.jp wrote:
Hello.
Does anyone know this?
As the package page on CRAN
http://cran.r-project.org/web/packages/rgdal/index.html
says:
rgdal binaries for OSX are available from the CRAN (extras) repository
which you access by setting:
setRepositories(in
If you install the geos available from
http://www.kyngchaos.com/software/frameworks
the rgeos from source code works OK as long as you direct the lib and include
to the right places. You may want proj4 as well. Check the dependencies, I
think you will need the UNIX Image IO frameworks as well
Here's a really simple example using the default low res longlat
coastline in the maps package. It should work for any coastal dataset
that can extract the raw coordinates from, though there's no attempts
at efficiency. spDistsN1 is really fast and works well for this
though, be careful to use long
Hello does anyone know of any R -script or function which will give the
value of nearest distance from coast of a point
in USA.
I have a number of latitude and longitude values spread evenly across USA
and i want to find the nearest distance from coast for
each of these points. If not a function
Hello.
Does anyone know this?
Thanks in advance.
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Dear R users,
I'm estimating a spatial error model for panel data by maximum likelihood
(library splm, function spml). I'm using R version 2.13.1 (2011-07-08)
platform: x86_64-pc-mingw32/x64 (64-bit). The operational system is Windows 7
64-bit and my computer has 4Gb of RAM.
My panel data has
Sorry for cross posting
You can check also the asdarbook website or the cran of different packages they
have really nice data. Juan
Sent on the Sprint® Now Network from my BlackBerry®
-Original Message-
From: Greg Snow
Sender: r-sig-geo-bounces@r-project.orgDate: Thu, 22 Sep 2011 08:56:
In the TeachingDemos package there are 3 datasets 'ccc', 'h2h', and 'towork'
which are real, not overly large (but you can decide if they are small or not)
which contain lat, long, and other variables.
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@
Dear all,
I would like to share a function that, as suggested by Roger, displays
arrows as SpatialLinesDataFrame objects that can be plotted with the spplot
command.
Little reproducible example:
> # Setup
> data(meuse)
> data(meuse.grid)
> attach(meuse)
> coordinates(meuse) <- ~x+y
> coordinates(m
Edzer, I have 256 meteorological station and 39 year value.
> dim(w)
[1] 256 39 1
Before I tried only spatial kriging and I did not get memory.size error. Just a
moment ago, I used another computer (64-bit Windows and 6 GB RAM), again I got
the same error.
-Original Message-
From:
Ok, thanks a lot.
I wonder how I could have digitized one segment of length 0 (???)
Anyway, I thank you a lot for your answer. I think it will solve my problem
for the moment.
Best,
Mathieu
2011/9/22 Michael Sumner
> It seems it is because one of your line segments is of length zero,
> usin
It seems it is because one of your line segments is of length zero,
using your attachment:
load("track.RData")
library(spatstat)
which(!lengths.psp(track.psp) > 0)
[1] 17
Dropping the offender:
noZeroLengths <- track.psp[lengths.psp(track.psp) > 0]
(pts <- pointsOnLines(noZeroLengths, eps=50))
Hi,
A trick to get Nearest Neighbor (NN) is to use idw() from the gstat
package with setting the nmax parameter to 1. This limits the amount of
points used for the inverse distance weighted average to one, leading to
NN. I'm not sure if this is much faster than interp, but you can take a
look.
r
Pinar, what are the dimensions (space and time) of your data, i.e. what
does dim(w) return?
Have you tried kriging with a (spatial and/or temporal) subset?
On 09/22/2011 01:38 PM, Pınar Aslantas Bostan wrote:
> Hi Edzer,
>
> Thank you very much for your mail. I found two records have identical
Hi,
I am struggling with this quite a while already, and I haven't found a good
solution so far.
I want to disaggregate precipitation data. For this I have a grid with daily
precipitation in 1x1 km resolution, and additionally 24 grids with 10x10 km
resolution giving percentage charge of hourly pr
Hi Edzer,
Thank you very much for your mail. I found two records have identical location,
but it is not my fault because I checked the original source data and it is
erroneous.
Now I have another problem; R gives another error message:
Error: cannot allocate vector of size 95.4 Mb
My computer
Thanks for the answer!
I coerced my SpatialLinesDataFrame object to a psp object using a non-NA
column.
Plotting is OK but pointsOnLines still fails:
> track.psp <- as(track[, 2], "psp")
> plot(track.psp)
> pts<-pointsOnLines(track.psp, eps=50)
Erreur dans ppp(x = x, y = y, window = win) :
all c
Hi Holly,
Could you provide some insight into your int object. Does it happen for
all i?
My first guess is that your matrix 'int' might not be what you expect;
try: grid[int[,i],] and see whether it is a geometry.
Eelke
Op 8:59 PM, Whiteley,Holly schreef:
Dear list,
I was wondering if someon
On Thu, Sep 22, 2011 at 1:14 AM, Hodgess, Erin wrote:
> Dear R Sig Geo People:
>
> Does anyone have a small "real" data set with the longitude and latitude,
> along with a couple of data values per location that they would be willing to
> share, please?
>
>
>
> I'm using simulated data but thoug
The problem is that the first attribute on the track object, "ID" is
NA - and when plot.psp is trying to draw a legend it has nothing to
base the image "ribbon" on.
This should avoid the error:
plot(track.psp, ribbon = FALSE)
Try subsetting the attributes in the coercion to psp, choose which
col
Dear list,
I was wondering if someone could help me with polygon-polygon spatial
queries?
Similar to the below request in a previous thread, I have a
SpatialPolygonDataFrame for an environmental factor (seabed sediment),
and a gridded SpatialPolygonDataFrame. I am attempting to calculate the
Hi,
I Have a problem with a psp object.
I can't plot it, neither perform a pointsOnLines calculation on it.
---
Here is what I obtain with my different operations:
> track <- readOGR("voie.shp", "voie")
OGR data source with driver: ESRI Shapefile
Source: "voie.shp", layer: "voie"
with 1 features
Hi,
I am trying to use gwr in R but I'm having problems because some of my polygons
have missing values (NA) for the variables of interest. Do you have any
suggestions on how to solve this?
thanks
On 09/21/2011 03:05 PM, Ndjido Ardo BAR wrote:
> Dear Gianni,
>
> you can also convert your x-column to be a character and then assign any
> value to the line you will, just as follows
>
> df <- data.frame(x=c("a","b","c"),y=c(1,2,3))
>
> df$x<-as.character(df$x)
>
> df[which(df$x=="b"),'x']<-"b%"
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