Displaying 20 results from an estimated 100 matches similar to: "Re ading and Creating Shape Files"
2013 Jan 23
1
csv mask order
I have imported a CSV file:
rfishR <- read.csv(file="rfishR.csv",stringsAsFactors = FALSE,
strip.white = TRUE, na.strings = c("NA","") )
attach(rfishR)
When I call it up in R, it starts with line 2066 rather than 1 and some of the headers (used Headers = TRUE, too) are "masked"?
Sample data
loc
lat
lon
datum
water
date
obs
net
2010 Oct 12
2
Memory limit problem
Dear List,
I am trying to?plot?bathymetry contours around the Hawaiian Islands using the
package rgdal and PBSmapping.? I have run into a memory limit when trying to
combine two fairly small objects using cbind().? I have increased the memory to
4GB, but am being told I can't allocate a vector of size 240 Kb.? I am running R
2.11.1 on a Dell Optiplex 760 with Windows XP.? I have pasted
2010 Apr 01
3
Using GIS data in R
I have a simple problem: I need to load a ERSI shapefile of US states
and check whether or not a set of points are within the boundary of
these states. I have the shapefile, I have the coordinates but I'm
having a great deal of difficulty bringing the two together. The
problem is the various GIS packages for R do not play well with each
other. sp, shapefiles, maptools, etc all use different
2009 Jul 01
1
Map projections - converting latitude/longitude to eastings and northings
I am trying to set up a Grass project and need to set up the region so
that I can view the map. I can look at a map and find the lat/lon,
but the map projection is in UTM NAD38 WGS84 and I need to set the
eastings and northings. Is there a package that will help me
calculate this in R.
thanks
--
Stephen Sefick
Let's not spend our time and resources thinking about things that are
so little
2005 Nov 11
3
problems with for: warnings and segfault
Hi,
I have two problem with a for looping using R Version 2.1.1 (2005-06-20) on a
Debian Linux Testing.
The first problem: warnings messages
Look:
> xcoord <- 5
> ycoord <- 5
> indice <- 1
> for(i in c(1:5)) {indice <- indice+1;xcoord[indice] <- xcoord+i;
ycoord[indice] <- ycoord }
Warning messages:
1: number of items to replace is not a multiple of replacement
2008 Dec 15
1
Semi-random movement inside a circle
Dear list,
I am trying to program semi-random movement within a circle, with no particles leaving the circle. I would like them to bounce back when they come to close to the wall, but I don't seem to be able to get this right. Would somebody kindly give me a hint ? This is my code so far, the particle starts at some point and moves towards the wall, but I don't get the "bouncing
2008 Dec 15
1
Movement within a circle
Dear list,
?
I am trying to program semi-random movement within a circle, with no particles leaving the circle. I would like them to bounce back when they come to close to the wall, but?I don't seem to be able to get this right. ?Would somebody?be able to?give me a hint ? This is my code so far, the particle starts at some point and moves towards the wall, but I don't get the
2010 Jan 07
0
setting different environments
Hallo,
I have a set of S4 and S3 classes together in one script.
While running this script I create a lot of new functions and objects
An example for S3 and S4 classes:
## S3 classes
pt <- list(x=1,y=2)
class(pt) <- "xypoint"
xpos <- function(x, ...) UseMethod("xpos")
xpos.xypoint <- function(x) x$x
ypos <- function(x, ...) UseMethod("ypos")
2006 Sep 07
2
merging tables by columns AND rows
Hi everyone!
I have 100 tables of the form:
XCOORD,YCOORD,OBSERVATION
27.47500,42.52641,177
27.48788,42.52641,177
27.50075,42.52641,179
27.51362,42.52641,178
27.52650,42.52641,180
27.53937,42.52641,178
27.55225,42.52641,181
27.56512,42.52641,177
27.57800,42.52641,181
27.59087,42.52641,181
27.60375,42.52641,180
27.61662,42.52641,181
..., ..., ...
with approximately 1000000 observations for each.
2011 Nov 10
2
Error in axis ????
I did an update of both rstudio and my packages. I had some trouble but was
able to move a lot of the packages so most troubles seem to be behind me.
But having a problem with code that previously ran fine. See below:
require(quantmod)
Loading required package: quantmod
Loading required package: Defaults
Loading required package: xts
Loading required package: zoo
Attaching package: ?zoo?
The
2001 Feb 22
1
Graphical parameters in perspective plot
Hello,
I've a problem for setting graphical parameters in perspective plot
(function persp).
I wonder if it's possible to add some text (function text) on an
existing persp plot USING the axis coordinates.
In fact I want to add some text on a persp plot according to x
coordinates.
I've tried to use text(xcoord,ycoord, label="toto") but the toto text
doesn't appear at
2012 Mar 20
3
error message
Dear all,
Who will bail me out. Iam using R with S-Splancs. Anytime i typed in the syntex, an error will appear eg setwd("C:\\TEMP)
>dat <- read.table(cheshire_fmd.cvs",header=TRUE, sep=",")
> dat.<-read.table(''chesire_fmd.cvs'',header=TRUE,sep='',)
Error: unexpected symbol in "dat.<-read.table(''chesire_fmd.cvs"
>
2009 Mar 01
1
projecting GIS coordinates for analysis with spatstat package
I am working on creating an R package for doing fire department analysis and
am trying to create a function that can display emergency incident
densities. The following code sort of does the trick, but I need a display
that shows the number of incidents per square mile. I believe the code
below shows incidents per square unit (in this case, degrees lat/long).
To solve this problem, I believe
2008 Oct 15
3
Removing characters and periods from character strings
Hello R-users,
I have code that gives me the important variables from an analysis. I
need to input these variables into a different analysis. To do this, I
need to modify them slightly... 1) remove all numbers at the end of the
variables, 2) remove all periods.
I tried to do it with the awkward code below. It works to remove all
the numbers, but when I try to remove the period everything
2002 Jun 19
4
drawing ellipses
Hello again,
First I want to thank all the people who answered my question about line
width in graphs. I promise I will learn the 'par' help page by heart for
the end of the month !
I now want to trace some ellipses to emphasize groups of data. I found how
to trace circles with 'symbols()', but no ellipse. I'm planning on writing
my own function based on
2012 Dec 27
1
Help in using col in plot()..
Hello,
I have problem with using color.
plot(data_min1$macd,col='black',main="1 min MACD",type="l")
lines(data_min1$macdsig,col="red")
par(new=T)
plot(data_min1$macdhist,col=data_min3$histcol,type="h",main="")
axis(4,col='black')
par(new=F)
When I remove ",col=data_min3$histcol" in the 2nd plot()
2007 Jan 15
0
spatial correlaton in lme and gls
Hello,
I have multiple observations (replicates) per station...and the stations are distributed in space.
I've applied models using lme and gls from the nlme library. I've messed around with compound symmetry to capture the correlation within stations. My question is.....I have x and y coordinates for each station (the subsamples have nearly the same coordinates)...how do you
2004 Jun 30
0
R crashes (PR#7037)
Full_Name: thomas cornulier
Version: 1.9.0 and 1.9.1
OS: Win XP
Submission from: (NULL) (194.254.155.62)
the following function produces R crashes under windows XP
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 1
minor 9.1
year 2004
month 06
day
2008 Jul 25
0
Error in vector("double", length)
Please see the code below.
When I try to run the variogram - vg.deft<-variog(rd,uvec=10)
I keep getting this error-
variog: computing omnidirectional variogram
Error in vector("double", length) : vector size specified is too large
Also, when I try to define distance-based neighborhood -
nb.tr=dist.neighbors(tr.locs,2)
I get this error -
Error in vector("double", length) :
2006 May 10
1
kernel smoothing of disease rates at locations
I want to do kernel smoothing on the standardised mortality rates at
specified location(x-y coordinates) and be able to produce contour map.
I've tried to use the package called fields in R (function smooth.2d)
but the problem is I get negative results after smoothing and I do not
understand why? Your contributions will be highly appreciated or if
there is any package that can do this I