search for: beaudette

...ot find gdal-config --- which was recently installed with GRASS. I have updated my PATH environment variable, logged out, but R still cannot find the gdal-config program. any tips on getting the rgdal package up and running on MacOS or Windows would be greatly appreciated. Cheers, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341

...or percentage for this specified model, after 10 runs of the cross-validation? any tips on understanding the output from cv.glm() would be greatly appreciated. I am mostly looking to perform a sensitivity analysis with this model and dataset - perhaps there are other methods? thanks -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341

...0000) for(i in 1:10000) { m[i] <- mean(sample(x$y, 100)) } 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

...du/nelson_eby/89.315/IMAGES/Figure%209-78.jpg I am thinking 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

...cale each of the variables, regardless of their intrinsic range to some set range, say from {0,1} ? I have tried dividing a variable by the maximum value of that variable, but I am not sure if this is statistically correct. Any ideas, thoughts would be greatly appreciated. Cheers, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341

...d' make[1]: *** [recommended-packages] Error 2 make[1]: Leaving directory `/home/dylan/src/R-2.3.1/src/library/Recommended' make: *** [stamp-recommended] Error 2 note that i am using the GCC flags: CFLAGS=-march=opteron -ffast-math CXXFLAGS=-march=opteron -ffast-math any ideas? -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341

...method, data=x, weights=area_fraction, tau=0.5), se='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

...that can then me modeled like this: [y ~ rcs(x)] ~ z. Is 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

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...numbers in position 3 axis(3,0.154/(2*sin(TIK[,1]/2*pi/180))) ...obviously the nature of the numbers in both axes is quite different. is it possible to have the bottom axis (degrees 2Theta) line up with a corosponding top axis of 0.154/(2*sin(TIK[,1]/2*pi/180)) ? thanks in advance! -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341

...ol='class2', col.regions=cols, scales=list(draw=T), 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

...s an example: library(lattice) # some fake data: d <- data.frame(x=runif(20), x.class=rep(letters[1:5], each=4), f1=rep(letters[1:2], each=10), f2=rep(letters[10:19], each=2) ) # plot it: dotplot(x.class ~ x | f1 + f2, data=d, scales=list(relation='free')) Thanks, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341

...used to generate the data... Am I mis-interpreting the use 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

..."unsupervised" approach using clara() works well, but I feel the output classes would be more meaningful if I were able to let clara() know about the classes that I have in mind. Is this at all feasible, or am I trying to accomplish something that is not possible? Cheers, -- Dylan Beaudette Soils and Biogeochemistry Graduate Group University of California at Davis 530.754.7341

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.

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Hi, Is anyone aware of a rank-based, non-paired test such as the Krustal-Wallis, that can accommodate weights? Alternatively, would it make sense to simulate a dataset by duplicating observations in proportion to their weight, and then using the Krustal-Wallis test? thanks! Dylan

...1.806618 88.078858 16.194423 58.051642 as.vector(coef(l.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

...ms like this approach would yield insight into whether or 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

...base other attached packages: [1] plyr_0.1.9 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