search for: lawr

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2013 Feb 21
4
Getting htmlParse to work with Hebrew? (on windows)
Hello dear R-help mailing list. Looks like the same issue in Russian: library(RCurl) library(XML) u = " http://www.cian.ru/cat.php?deal_type=2&obl_id=1&room1=1" a = getURL(u) a # Here - the Russian is fine. a2 <- htmlParse(a) a2 # Here it is a mess... None of these seem to fix it: htmlParse(a, encoding = "windows-1251") htmlParse(a, encoding =
2006 Dec 11
1
cohen kappa for two-way table
Greetings, I am a bit confused by the results returned by the functions: cohen.kappa {concord} classAgreement {e1071} when using a two-way table. for example, if I have an matrix A, and a similar matrix B (same dimensions), then: matrix A and B can be found: http://casoilresource.lawr.ucdavis.edu/drupal/files/a_40.txt http://casoilresource.lawr.ucdavis.edu/drupal/files/b_40.txt A <- matrix(unlist( read.table('a_40.txt'), use.names=FALSE), ncol=14) B <- matrix(unlist( read.table('b_40.txt'), use.names=FALSE), ncol=14) # compute cohen's kappa, default s...
2010 Sep 16
2
parallel computation with plyr 1.2.1
...0)) } mean(m) } system.time(ddply(d, .(id), .fun=f, .parallel=FALSE)) # user system elapsed # 2.740 0.016 2.766 system.time(ddply(d, .(id), .fun=f, .parallel=TRUE)) # user system elapsed # 2.720 0.000 2.726 -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2008 Jun 04
2
estimate phase shift between two signals
...e or output from spectrum() here? If so, is there a general procedure for estimating a phase-shift between two noisy signals? Would I first have to fit a smooth function in order to solve this analytically? Thanks in advance, -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2007 Oct 08
1
do not plot polygon boundaries with spplot {sp}
...), xlab="Easting (m)", ylab="Northing (m)") ... seems to work well. However the polygon boundaries are colored black. If possible I would like the boundaries to not be drawn at all. any tips? cheers, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2005 Jul 07
1
Orthogonal Distance Regressions
...with experience doing this type of regression. Thanks in advance! Peter Peter J. Hernes, Ph.D. Land, Air and Water Resources - Hydrology University of California One Shields Avenue Davis, CA 95616-8628 Tel: 530-752-7827 Fax: 530-752-5262 E-mail: pjhernes at ucdavis.edu Faculty webpage: http://lawr.ucdavis.edu/faculty/hernes/
2008 Jun 09
3
piper diagram
...ing that two calls to triax.plot (plotrix) along with some kind of affine-transformed standard plot would do the trick. Not so sure about the final layout, or a nice generalized version for something like lattice. Cheers, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2008 Aug 19
4
converting coordinates from utm to longitude / latitude
Hi, is there a function in R to convert data read with read.shape and which is originally in UTM coordinates into longitude / latitude coordinates? I found the convUL() function from the PBSmapping package but I have no idea how I could apply that to the read.shape object. Many thanks, Werner __________________________________________________ Do sragenden Schutz gegen Massenmails.
2009 Jul 09
3
Stratified data summaries
Hi All, I'm trying to automate a data summary using summary or describe from the HMisc package. I want to stratify my data set by patient_type. I was hoping to do something like: Describe(myDataFrame ~ patient_type) I can create data subsets and run the describe function one at a time, but there's got to be a better way. Any suggestions? Rachel [[alternative HTML
2008 Oct 13
2
Using an image background with graphics
I would like to use a map or aerial photo as a background to plotting solid lines and text, and semi-transparent color contours, in base and lattice graphics. Plot coordinates need to be consistent with the georeferenced background. For example, a color contour plot would have an gray-toned aerial photograph as a background for overprinted semi-transparent color contours of some spatially
2008 Feb 13
1
use of poly()
....poly.raw)) -0.1025114 1.5265248 2.0617970 2.7393995 When using continuous data in both Y and X, does the difference between "raw" and "orthagonal" polynomials have any practical meaning? Thanks, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2008 Mar 05
1
testing for significantly different slopes
...not the two slope terms (InsulBefore:Gas and InsulAfter:Gas) were different. However, is there a formal test for this sort of question, and can it be generalized to differences between more than 2 slope terms? Thanks, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2008 Aug 29
7
model II regression - how do I do it?
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2010 Feb 17
1
strangeness in Predict() {rms}
...mgcv_1.5-5 RColorBrewer_1.0-2 nlme_3.1-94 [5] rms_2.1-0 Hmisc_3.7-0 survival_2.35-6 lattice_0.17-25 loaded via a namespace (and not attached): [1] cluster_1.12.0 Any ideas? Thanks! Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2007 Sep 20
2
Superimposing vector polygons over raster grid in a plot
Hello: I would like to superimpose vector polygons (state outlines) from a Shape file on top of a satellite image, imported into a SpatialGridDataFrame from GEOTIFF via gdal_translate and readGDAL. When I plot polygon and point shape files in R, into SpatialPointDataFrame and SpatialPolygonDataFrame, the two feature sets line up geographically, so it seems logical that a SpatialGridDataFrame
2009 Oct 23
2
interpretation of RCS 'coefs' and 'knots'
...s this interpretation of RCS coefficients even possible? If not, would forcing knot locations make it a possibility? Or, would modeling both knots and RCS coefs with external variables lead to sensible predictions? Cheers, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2008 Jul 16
2
gstat problem with lidar data
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2009 Jun 30
2
odd behaviour in quantreg::rq
...ker') # without weights # note error message summary(rq(sand ~ method, data=x, tau=0.5), se='ker') # without weights, no error message summary(rq(sand ~ method, data=x, tau=0.5, method='fn'), se='ker') -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2009 Jun 04
2
RPostgreSQL segfault with LEFT JOIN
...stats graphics grDevices utils datasets methods base other attached packages: [1] RPostgreSQL_0.1-4 DBI_0.2-4 ---------------------------------------------------------------------------------------------------- -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341
2006 Nov 07
0
evaluation of 2 matrices: categorical comparison
...#39;s Kappa (using the cohen.kappa function from the 'concord' package) : # a and b are vectors with the 'factor-ized' matrices, stored as vectors cohen.kappa(table(a,b), type='count') A lengthy summary of this small adventure has been recorded here: http://casoilresource.lawr.ucdavis.edu/drupal/node/275/ Please note that I am looking for a *better?* way to compare these two matrices. It could be that the Cohen's Kappa, and difference maps are the best that I am going to get. Thanks in advance, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group Univer...