Hi, I have noticed an odd inconsistency when plotting a 'step' function (type='s') in xyplot() vs. plot().
For example, given the following data: ## generate some profile depths: 0 - 150, in 10 cm increments depth <- seq(0,150, by=10) ## generate some property: random numbers in this case prop <- rnorm(n=length(depth), mean=15, sd=2) ## since the 0 is not a depth, and we would like the graph to start from 0 ## make the first property row (associated with depth 0) the same as the second ## property row prop[1] <- prop[2] ## combine into a table: data read in from a spread sheet would already be in this format soil <- data.frame(depth=depth, prop=prop) ## simple depth plot, as steps: looks good! plot(depth ~ prop, data=soil, ylim=c(150,0), type='s', ylab='Depth', xlab='Property', main='Property vs. Depth Plot') ## now try it with lattice graphics:yuck! xyplot(depth ~ prop, data=soil, ylim=c(160,-5), type='s', ylab='Depth', xlab='Property', main='Property vs. Depth Plot') it looks like the data isn't rotated (?) correctly - i.e. the axis and data do not match. Now, am I mis-interpreting the meaning of type='s' in lattice graphics? here is my R session info: sessionInfo() R version 2.4.1 (2006-12-18) i686-pc-linux-gnu locale: LC_CTYPE=en_US;LC_NUMERIC=C;LC_TIME=en_US;LC_COLLATE=en_US;LC_MONETARY=en_US;LC_MESSAGES=en_US;LC_PAPER=en_US;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US;LC_IDENTIFICATION=C attached base packages: [1] "stats" "graphics" "grDevices" "utils" "datasets" "methods" [7] "base" other attached packages: lattice "0.14-17" could it be that my version of R and lattice is just too old? thanks in advance! Dylan ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
