From: Kjetil Halvorsen <kjetilbrinchmannhalvorsen_at_gmail.com>

Date: Wed, 01 Sep 2010 18:22:12 -0400

[11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C

R-devel_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-devel Received on Wed 01 Sep 2010 - 22:24:41 GMT

Date: Wed, 01 Sep 2010 18:22:12 -0400

I don't understand what is happening! I have a (large) object sim1, an
matrix list

with dim c(101,101) where each element is an 3*3 matrix. I am
subsetting that with

a matrix coo, of dim c(100,2), of unique indices, but the resulting object
has length 99, not 100 as expected.

Code reproducing the problem follows:

sim0 <- GaussRF(x=seq(0, 100, by=1), y=seq(0, 100, by=1), grid=TRUE, model="spherical", param=c(0, 1, 0, 10), trend=NULL, n=9, gridtriple=FALSE) simmatrices <- function(arr) # arr must be an array of rank 3 { d <- dim(arr) n1 <- d[1]; n2 <- d[2] # we suppose d[3]==9 res <- vector(length=n1*n2, mode="list") dim(res) <- c(n1, n2) for (i in 1:n1) for (j in 1:n2) { x1 <- arr[i, j, 1:3];x2 <- arr[i, j, 4:6] x3 <- arr[i, j, 7:9] res[[i, j]] <- x1%o%x1 + x2%o%x2 + x3%o%x3 } res }

sim1 <- simmatrices(sim0)

sim1.obs <- sim1[coo]

dim(coo)

length(sim1.obs)

> sessionInfo()

R version 2.11.1 (2010-05-31)

i686-pc-linux-gnu

[1] LC_CTYPE=en_US.utf8 LC_NUMERIC=C [3] LC_TIME=en_US.utf8 LC_COLLATE=en_US.utf8 [5] LC_MONETARY=C LC_MESSAGES=en_US.utf8 [7] LC_PAPER=en_US.utf8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C

[11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C

attached base packages:

[1] stats graphics grDevices utils datasets methods base

other attached packages:

[1] lattice_0.18-8 gstat_0.9-69 sp_0.9-66

[4] RandomFields_1.3.41

loaded via a namespace (and not attached):

[1] fortunes_1.3-7 grid_2.11.1 tools_2.11.1

>

Kjetil

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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Wed 01 Sep 2010 - 22:24:41 GMT

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