Displaying 20 results from an estimated 800 matches similar to: "Problem with adding a raster and a brick"
2018 May 24
0
Problem with adding a raster and a brick
On Thu, 24 May 2018 at 18:41 Mark R Payne <markpayneatwork at gmail.com> wrote:
Hi,
I seem to be having a problem adding the following two raster objects
together - one is a rasterLayer, the other is a rasterBrick. The extent,
resolution, and origin are the same, so according to my understand it
should work. The objects look like so:
> obs.clim
class : RasterLayer
dimensions : 60, 200,
2018 Jun 01
0
Problem with adding a raster and a brick
This is now fixed in development on RForge, you can try it out by
installing from there, or from the Github mirror with
devtools::install_github("rforge/raster/pkg/raster").
(To get fixes into raster email the maintainer directly - you might not get
a response but it'll be addressed).
Cheers, Mike.
On Thu, 24 May 2018 at 20:08 Michael Sumner <mdsumner at gmail.com> wrote:
2013 Feb 18
1
Calculating seasonal anomalies
I have an irregular time series, which cannot easily be converted to a ts
object (long stretches with NA).
I have calculated the climatological mean and st.dev, but need help on how
to calculate the anomalies from the climatology and my original data set.
Below is an example, where I have indicated the basic idea of what I want to
do under Question 1 and 2. I assume I will have to create a custom
2018 Mar 28
2
Fwd: netCDF to GeoTIFF by layer in r
Hi
I have a netCDF file of volumetric soil water content at four
different soil layers and want to convert each soil layer in the
netCDF file to a GeoTIFF layer. This code converts the netCDF file to
one GeoTIFF layer, i.e. unclear which soil depth.
file.nc <- "C:/Soil_Weather_data/Agro/VMC21/VMC21.nc"
file.tiff <- "C:/Soil_Weather_data/Agro /VMC21/VMC21"
importnetcdf
2018 Mar 28
0
netCDF to GeoTIFF by layer in r
Hi Ahmed,
When reading from a ncdf file you can use the 'varname', 'lvar' and 'level' arguments - see the 'Details' section in the docs
https://www.rdocumentation.org/packages/raster/versions/2.6-7/topics/raster <https://www.rdocumentation.org/packages/raster/versions/2.6-7/topics/raster>
We can't tell what is in the ncdf file from what you report other
2013 Jan 18
2
How to re-project ease( Equal Area Scalable Earth) grid with a ~25 km cylindrical projection to WGS84 0.25 degree?
I have nc files for global soil moisture,here is one file
https://echange-fichiers.inra.fr/get?k=f9DDllPKdUKs5ZNQwfq
from the metadata ,the projection is cylindrical and the resolution is 25
km(it is based on authalic sphere based on International 1924 ellipsoid).As
I want to compare with other data, I have to make them identical.
- my other data are in WGS84 with 0.25*0.25 degree resolution
2011 Jan 24
0
writeRaster with raster package
Hello,
I have a problem writing a raster with the raster package.
I have the raster object "mask" which has the following geoinformation:
---- R output
> mask
class : RasterLayer
filename :
E:/Daten/FE/HyMAP/Luxembourg_2010/Kehlen_Useldange/mosaik/LUX_LC_noOverlap_mask
nrow : 5198
ncol : 2813
ncell : 14621974
min value : 0
max value : 255
2012 Oct 18
1
spTransform longlat to utm
Dear all,
I am trying to project my LongLat-maps to a plane.
The ultimate purpose is to do a search of points in vicinity of other points using overlay-commands (sp) with radius in km.
I am applying spTransform (package rgdal) and it gives my some curious results.
An example.
Let's take a point lying somewhere in Germany, zone=32U
x <- 8.968735
y <- 49.454735
After conversion I
2006 Oct 18
1
conversion of LL coordenates to UTM problems (ED50-WGS84 format)
Hi R-Users,
I have plotted a region whose polygon coordinates are given in shp format ED50 UTM (zone=30) ) using "readShapePoly" in library(maptools).
Now I need to plot a set of points in that region (my.dataframe, with X and Y geographic coordinates), which have been read using GPS in Longitud-Latitud form (using WGS84 system), so I first need to convert these Longitud-Latitud data
2012 May 15
0
Problem with legend and RasterLayer
Dear,
I can't plot legend over a Rasterlayer.
My system is MAC OS Lion.
See my problem:
####### Data
> img
class : RasterLayer
dimensions : 5, 5, 25 (nrow, ncol, ncell)
resolution : 0.002245, 0.002245 (x, y)
extent : -48.33875, -48.32753, -20.35756, -20.34634 (xmin, xmax,
ymin, ymax)
coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84
+towgs84=0,0,0
2012 Jun 05
2
Converiting longitude/latitude to utm
Dear all,
I have been trying to convert coordinates from longitude/latitude to utm
but I got an error. As soon as the longitude coordinate is greater than 90,
I get the folloowing error message: "error in pj_transform: latitude or
longitude exceeded limits"
Here is what I did:
SP<-SpatialPoints(cbind(126.59,-14.30),proj4string=CRS("+proj=longlat"))
2018 Nov 03
1
odd NOTE in R CMD check of data; Rcpp module related
With the current version of the "raster" package (that I maintain), R CMD
check on packages "soilDB" and "PopGenReport" have this NOTE:
Package: soilDB
Check: data for non-ASCII characters
New result: NOTE
Error in .requirePackage(package) :
unable to find required package 'raster'
Calls: <Anonymous> ... .findInheritedMethods ->
2012 Jun 06
0
randomForest Species Distribution Modelling
Hi,
I appologise if this is a rudimentary question and long winded but I just
wanted to let ye know where I'm comming from. I'm new to R and I'm trying to
use the 'randomForest' package to classify and predict. The Error message
that is troubling me is:
> pr<-predict(predictors,rf1, ext=ext)
Error in x[...] <- m : NAs are not allowed in subscripted assignments
In
2018 Jun 01
1
rasterize SpatialPolygon object using a RasterBrick object
I am trying to rasterize a SpatialPolygon object by a RasterBrick object.
The documentation of the raster::rasterize function explicitly says this is
allowed. Here's what I am doing
# load the raster package
library("raster")
# create a raster brick object using the example from the brick
function documentation
b <- brick(system.file("external/rlogo.grd",
2012 Dec 13
2
More efficient use of reshape?
Hi all,
I have played a bit with the "reshape" package and function along with
"melt" and "cast", but I feel I still don't have a good handle on how to
use them efficiently. Below I have included a application of "reshape" that
is rather clunky and I'm hoping someone can offer advice on how to use
reshape (or melt/cast) more efficiently.
#For this
2009 Jul 23
1
Creating a loop to read 3D dataset
Dear all,
I have in my possession a netcdf from which I want to extract some data files. I have used the "ncdf" package to read the netcdf file and used the "get.var.ncdf" function to identify the variable i wish to use. The data is in the form of a time-series of geographical data points that relate to climatology variables. As such I have a large data frame,
2006 Jun 27
3
Possible to get a definition of a function from a package to use without invoking the package?
Hi,
I often use the mod() and instring() functions that are available in the
clim.pact package. This package has a lot of dependencies, including
installation of netCDF, and I haven't yet been able to get
library(clim.pact) to work on a Mac OS 10.4.6. A previous request for
help with the Mac problem yielded no results, so now I wonder if I could
just extract the definitions for the couple
2012 Dec 17
2
looping through spatial points and getting counts of spatial points in spatial grid in R
Hi,
I am stuck in a looping problem. It might be an easy problem for experienced R users but I have been unable to do it. Any kind of help or advice will be great appreciated.
I am creating a spatial grid and have a list of spatial points in a folder. I can read the spatial points separately and get a count of the points in the spatial grid in R. The output should be a table showing the counts of
2018 Apr 23
2
Conditional analysis before inliner
Thanks for the answer Eli.
I think I was a little too vague in my question. The program has the
following structure:
void foo() {
bar();
}
void bar() {
for (..) {
__builtin_compute()
}
}
We would like to use scalar evolution + loopinfowrapperpass inside
instcombine only if __builtin_compute is present. instcombine can convert
the loop into a single builtin ie.
void bar() {
2008 Jul 15
1
code reduction (if anyone feels like it)
# I am sure that I could be more efficient than this but how? Thanks in
advance.
#GPS in Decimal Degrees in the form longitude latitude
RM215 <- matrix(c(-82.1461363, 33.5959109), nrow=1)
SC <- matrix(c(-82.025888, 33.606454), nrow=1)
RM202 <- matrix(c(-81.9906723, 33.5027653), nrow=1)
RM198 <- matrix(c(-81.926823, 33.4634678), nrow=1)
HC <- matrix(c(-81.920505, 33.46192), nrow=1)