Re: [R] DescTools::Quantile
It looks like a homework assignment. It also looks like you didn't read the documentation carefully enough. The 'len.out' argument in seq is solely for specifying the length of a sequence. The 'quantile' function omputes the empirical quantile of raw data in the vector 'x' at cumulative probabilit(y)(ies) given in the weights' argument, with interpolation I'm between. For example quantile(x=c(2.3, 1, 7, -4, 1), weights=c(0.60,0.45)) 60% 45% 1.52 1.00 So to do what you want, there may be a canned function in R but you can always write your own. First we write one that takes values in 'x' and weights in 'w', vectors of the same length, and returns the quantile at cumulative probability 'p' for a 'p' of length 1. "%,%" <-paste0 qtl.one <- function(p, x, w) { ## argument checking bad <- length(x)!=length(w) bad <- bad || (length(p)!=1) bad <- bad || any(diff(x)<=0) if(bad) stop("Arguments 'x' and 'w' must be " %,% "vectors of the same legnth. Argument " %,% "'x' must be a vector of nondecreasing " %,%"values.") if(any(w<=0)||(sum(w)!=1)) stop("elements of 'w' must be positive " %,%"and sum to 1") ## the actual body of the function x[max(which(cumsum(w)<=p))] } Now we write a vectorization of the above that will work given a vector of 'p' cumulative probabilities: qtl <- function(p, x, w) { if(length(p)==1) ans <- qtl.one(p, x, w) if(length(p) >1) ans <- sapply(p, FUN=qtl.one, x=x,w=w) ans } From: "Izmirlian, Grant (NIH/NCI) [E]" Date: Mon, Jan 29, 2024, 3:55 AM To: "Izmirlian, Grant (NIH/NCI) [E]" Subject: Re: [R] DescTools::Quantile Greetings, I am having a problem with DescTools::Quantile (a function computing quantiles from weighted samples): # these sum to one probWeights = c( 0.0043, 0.0062, 0.0087, 0.0119, 0.0157, 0.0204, 0.0257, 0.0315, 0.0378, 0.0441, 0.0501, 0.0556, 0.06, 0.0632, 0.0648, 0.0648, 0.0632, 0.06, 0.0556, 0.0501, 0.0441, 0.0378, 0.0315, 0.0257, 0.0204, 0.0157, 0.0119, 0.0087, 0.0062, 0.0043 ) x = seq(-100,100,length.out=length(probWeights)) qtls <- DescTools::Quantile(x, weights=probWeights, probs=c(0.1,0.9)) cat("\nQuantiles:\n") print(qtls) Both quantiles are equal to 100! Is this function working or am I not using it correctly? Michael Meyer [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
Re: [R] New line in caption with math symbols embedded in expression (paste(
You th' barradas!!! -Original Message- From: Rui Barradas Sent: Thursday, February 18, 2021 2:10 PM To: Izmirlian, Grant (NIH/NCI) [E] ; r-help@r-project.org Subject: Re: [R] New line in caption with math symbols embedded in expression (paste( Hello, First of all the plotmath in your code doesn't need paste, expression alone will do it. I am not sure that the following is what you want. I create the caption beforehand, in order to make the plotting code simpler. The asterisks/tildes make less/more space between the text line's elements. e <- expression( atop( P * "(" * FDP ~ ">" ~ alpha * ") " ~ "for 'FDR' and 'Auto' FDP control method, vs '" * m * "' at levels of 'eff size' (col) and '" * p[1] * "' (row)" ~ "and", "a new line" ~ bar(x) == sum(frac(x[i], n), i==1, n) ) ) p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption = e) p <- p + theme(plot.caption = element_text(hjust = 0)) p Hope this helps, Rui Barradas Às 17:37 de 18/02/21, Izmirlian, Grant (NIH/NCI) [E] via R-help escreveu: > ## I am using ggplot and trying to produce a caption containing math symbols. > I need to > ## add a second line. I did a fair amount of googling for answers. This one > seemed like > ## it would answer my question as it is nearly exactly my problem, except > there is only > ## one argument to the paste function. Note that my example is a complete > minimal > ## example, just a scatterplot with a line, and the caption content seems to > not have > ## anything to do with the plot. That is of course, intentional. > ## > ## > https://stackoverflow.com/questions/13223846/ggplot2-two-line-label-with-expression > > library(ggplot2) > X <- 10*runif(100) > Y <- 2*X + rnorm(100, sd=2) > fit <- lm(Y~X) > Y.p <- predict(fit, newdata=data.frame(X=X)) > DAT <- data.frame(X=X) > > ## without a newline > p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) > p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", > "for 'FDR' and 'Auto' FDP control method, vs '", m, > "' at levels of 'eff size' (col) and '", p[1], "' > (row)"))) > p <- p + theme(plot.caption = element_text(hjust = 0)) > > ## newline, method 1, just add a new component of paste containing "\n" > somewhere in the middle > p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) > p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", > "for 'FDR' and 'Auto' FDP control method, vs '", m, > "' at levels of 'eff size' (col) and '", p[1], "' > (row)", > "and \n a new line"))) > p <- p + theme(plot.caption = element_text(hjust = 0)) > > ## doesn't work because the newline affects only the last component of paste. > It looks like new line > ## works if the line is long enough, but the newline character is being > parsed until the individual > ## arguments to paste are parsed for math symbols but prior to pasting the > components together. prior > ## to pasting all arguments. I can't imagine why this would be the desired > behavior. When the value of a > ## caption argument is expression(paste(s1, s2, s3, ...)) then parsing for a > newline character should > ## occur after the components are pasted together, right? > > ## newline, method 2, enclose paste in another paste and add the new line as > the second argument of the > ## outer paste > p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) > p <- p + labs(caption=expression(paste(paste(P,"(",FDP,">", alpha,") ", > "for 'FDR' and 'Auto' FDP control method, vs '", m, > "' at levels of 'eff size' (col) and '", p[1], "' > (row)"), > "and \n a new line"))) > p <- p + theme(plot.caption = element_text(hjust = 0)) > > ## which has the same behavior > > > [[alternative HTML version deleted]] > > __ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
Re: [R] New line in caption with math symbols embedded in expression (paste(
This is beautiful. Thanks! G -Original Message- From: Rui Barradas Sent: Thursday, February 18, 2021 2:10 PM To: Izmirlian, Grant (NIH/NCI) [E] ; r-help@r-project.org Subject: Re: [R] New line in caption with math symbols embedded in expression (paste( Hello, First of all the plotmath in your code doesn't need paste, expression alone will do it. I am not sure that the following is what you want. I create the caption beforehand, in order to make the plotting code simpler. The asterisks/tildes make less/more space between the text line's elements. e <- expression( atop( P * "(" * FDP ~ ">" ~ alpha * ") " ~ "for 'FDR' and 'Auto' FDP control method, vs '" * m * "' at levels of 'eff size' (col) and '" * p[1] * "' (row)" ~ "and", "a new line" ~ bar(x) == sum(frac(x[i], n), i==1, n) ) ) p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption = e) p <- p + theme(plot.caption = element_text(hjust = 0)) p Hope this helps, Rui Barradas Às 17:37 de 18/02/21, Izmirlian, Grant (NIH/NCI) [E] via R-help escreveu: > ## I am using ggplot and trying to produce a caption containing math symbols. > I need to > ## add a second line. I did a fair amount of googling for answers. This one > seemed like > ## it would answer my question as it is nearly exactly my problem, except > there is only > ## one argument to the paste function. Note that my example is a complete > minimal > ## example, just a scatterplot with a line, and the caption content seems to > not have > ## anything to do with the plot. That is of course, intentional. > ## > ## > https://stackoverflow.com/questions/13223846/ggplot2-two-line-label-with-expression > > library(ggplot2) > X <- 10*runif(100) > Y <- 2*X + rnorm(100, sd=2) > fit <- lm(Y~X) > Y.p <- predict(fit, newdata=data.frame(X=X)) > DAT <- data.frame(X=X) > > ## without a newline > p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) > p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", > "for 'FDR' and 'Auto' FDP control method, vs '", m, > "' at levels of 'eff size' (col) and '", p[1], "' > (row)"))) > p <- p + theme(plot.caption = element_text(hjust = 0)) > > ## newline, method 1, just add a new component of paste containing "\n" > somewhere in the middle > p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) > p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", > "for 'FDR' and 'Auto' FDP control method, vs '", m, > "' at levels of 'eff size' (col) and '", p[1], "' > (row)", > "and \n a new line"))) > p <- p + theme(plot.caption = element_text(hjust = 0)) > > ## doesn't work because the newline affects only the last component of paste. > It looks like new line > ## works if the line is long enough, but the newline character is being > parsed until the individual > ## arguments to paste are parsed for math symbols but prior to pasting the > components together. prior > ## to pasting all arguments. I can't imagine why this would be the desired > behavior. When the value of a > ## caption argument is expression(paste(s1, s2, s3, ...)) then parsing for a > newline character should > ## occur after the components are pasted together, right? > > ## newline, method 2, enclose paste in another paste and add the new line as > the second argument of the > ## outer paste > p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) > p <- p + labs(caption=expression(paste(paste(P,"(",FDP,">", alpha,") ", > "for 'FDR' and 'Auto' FDP control method, vs '", m, > "' at levels of 'eff size' (col) and '", p[1], "' > (row)"), > "and \n a new line"))) > p <- p + theme(plot.caption = element_text(hjust = 0)) > > ## which has the same behavior > > > [[alternative HTML version deleted]] > > __ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
Re: [R] New line in caption with math symbols embedded in expression (paste(
Thank you for your suggestions. So you’re suggesting I bypass the ggplot symbol parsing by passing a character string to caption which has latex2exp in it. Good idea. So in this approach, I should break the string into new lines via ‘atop’? Thanks From: Bert Gunter Sent: Thursday, February 18, 2021 1:47 PM To: Izmirlian, Grant (NIH/NCI) [E] Cc: r-help@r-project.org Subject: Re: [R] New line in caption with math symbols embedded in expression (paste( See also this: https://cran.r-project.org/web/packages/latex2exp/vignettes/using-latex2exp.html Bert On Thu, Feb 18, 2021 at 10:42 AM Bert Gunter mailto:bgunter.4...@gmail.com>> wrote: Note, from ?plotmath: "Control characters (e.g., \n) are not interpreted in character strings in plotmath, unlike normal plotting." For this reason, as best I can tell, you need to fool with plotmath's "atop" command or do separate "labs" calls. This post seems to confirm that opinion: https://stackoverflow.com/questions/29112697/adding-a-newline-in-a-substitute-expression I certainly would welcome a better alternative. Cheers, Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Thu, Feb 18, 2021 at 9:37 AM Izmirlian, Grant (NIH/NCI) [E] via R-help mailto:r-help@r-project.org>> wrote: ## I am using ggplot and trying to produce a caption containing math symbols. I need to ## add a second line. I did a fair amount of googling for answers. This one seemed like ## it would answer my question as it is nearly exactly my problem, except there is only ## one argument to the paste function. Note that my example is a complete minimal ## example, just a scatterplot with a line, and the caption content seems to not have ## anything to do with the plot. That is of course, intentional. ## ## https://stackoverflow.com/questions/13223846/ggplot2-two-line-label-with-expression library(ggplot2) X <- 10*runif(100) Y <- 2*X + rnorm(100, sd=2) fit <- lm(Y~X) Y.p <- predict(fit, newdata=data.frame(X=X)) DAT <- data.frame(X=X) ## without a newline p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", "for 'FDR' and 'Auto' FDP control method, vs '", m, "' at levels of 'eff size' (col) and '", p[1], "' (row)"))) p <- p + theme(plot.caption = element_text(hjust = 0)) ## newline, method 1, just add a new component of paste containing "\n" somewhere in the middle p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", "for 'FDR' and 'Auto' FDP control method, vs '", m, "' at levels of 'eff size' (col) and '", p[1], "' (row)", "and \n a new line"))) p <- p + theme(plot.caption = element_text(hjust = 0)) ## doesn't work because the newline affects only the last component of paste. It looks like new line ## works if the line is long enough, but the newline character is being parsed until the individual ## arguments to paste are parsed for math symbols but prior to pasting the components together. prior ## to pasting all arguments. I can't imagine why this would be the desired behavior. When the value of a ## caption argument is expression(paste(s1, s2, s3, ...)) then parsing for a newline character should ## occur after the components are pasted together, right? ## newline, method 2, enclose paste in another paste and add the new line as the second argument of the ## outer paste p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption=expression(paste(paste(P,"(",FDP,">", alpha,") ", "for 'FDR' and 'Auto' FDP control method, vs '", m, "' at levels of 'eff size' (col) and '", p[1], "' (row)"), "and \n a new line"))) p <- p + theme(plot.caption = element_text(hjust = 0)) ## which has the same behavior [[alternative HTML version deleted]] __ R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To UNSUBSCRIBE and more, see 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. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
[R] New line in caption with math symbols embedded in expression (paste(
## I am using ggplot and trying to produce a caption containing math symbols. I need to ## add a second line. I did a fair amount of googling for answers. This one seemed like ## it would answer my question as it is nearly exactly my problem, except there is only ## one argument to the paste function. Note that my example is a complete minimal ## example, just a scatterplot with a line, and the caption content seems to not have ## anything to do with the plot. That is of course, intentional. ## ## https://stackoverflow.com/questions/13223846/ggplot2-two-line-label-with-expression library(ggplot2) X <- 10*runif(100) Y <- 2*X + rnorm(100, sd=2) fit <- lm(Y~X) Y.p <- predict(fit, newdata=data.frame(X=X)) DAT <- data.frame(X=X) ## without a newline p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", "for 'FDR' and 'Auto' FDP control method, vs '", m, "' at levels of 'eff size' (col) and '", p[1], "' (row)"))) p <- p + theme(plot.caption = element_text(hjust = 0)) ## newline, method 1, just add a new component of paste containing "\n" somewhere in the middle p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ", "for 'FDR' and 'Auto' FDP control method, vs '", m, "' at levels of 'eff size' (col) and '", p[1], "' (row)", "and \n a new line"))) p <- p + theme(plot.caption = element_text(hjust = 0)) ## doesn't work because the newline affects only the last component of paste. It looks like new line ## works if the line is long enough, but the newline character is being parsed until the individual ## arguments to paste are parsed for math symbols but prior to pasting the components together. prior ## to pasting all arguments. I can't imagine why this would be the desired behavior. When the value of a ## caption argument is expression(paste(s1, s2, s3, ...)) then parsing for a newline character should ## occur after the components are pasted together, right? ## newline, method 2, enclose paste in another paste and add the new line as the second argument of the ## outer paste p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p)) p <- p + labs(caption=expression(paste(paste(P,"(",FDP,">", alpha,") ", "for 'FDR' and 'Auto' FDP control method, vs '", m, "' at levels of 'eff size' (col) and '", p[1], "' (row)"), "and \n a new line"))) p <- p + theme(plot.caption = element_text(hjust = 0)) ## which has the same behavior [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
Re: [R] R-help Digest, Vol 212, Issue 4
Hi -- there are lots of replies --I have not read them all, if someone else suggested this, sorry for duplication. This is similar to the suggestion using mapply, but not specific to matrices. In fact it's a kludge that applies to many settings. You 'sapply' over the index 1:2, and pass a, b as arguments: a <- c(1,4) b <- c(5,8) sapply(1:2, FUN=function(x, a, b)a[x]:b[x], a=a,b=b) -Original Message- From: r-help-requ...@r-project.org Sent: Monday, October 05, 2020 6:04 AM To: r-help@r-project.org Subject: R-help Digest, Vol 212, Issue 4 Send R-help mailing list submissions to r-help@r-project.org To subscribe or unsubscribe via the World Wide Web, visit https://stat.ethz.ch/mailman/listinfo/r-help or, via email, send a message with subject or body 'help' to r-help-requ...@r-project.org You can reach the person managing the list at r-help-ow...@r-project.org When replying, please edit your Subject line so it is more specific than "Re: Contents of R-help digest..." __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
Re: [R] data frame solution
Statements like c(rbind(x, xx+yy), max(t)) and rep(0,length(df$b[1])) don't make any sense. You're example will be easier to understand if you show us the nrow(df) ==3 case. Thanks Grant Izmirlian, Ph.D. Mathematical Statistician izmir...@mail.nih.gov Delivery Address: 9609 Medical Center Dr, RM 5E130 Rockville MD 20850 Postal Address: BG 9609 RM 5E130 MSC 9789 9609 Medical Center Dr Bethesda, MD 20892-9789 ofc: 240-276-7025 cell: 240-888-7367 fax: 240-276-7845 From: Andras Farkas Sent: Tuesday, March 19, 2019 7:06 AM To: R-help Mailing List Subject: [R] data frame solution Hello All, wonder if you have thoughts on a clever solution for this code: df <- data.frame(a = c(6,1), b = c(1000,1200), c =c(-1,3)) #the caveat here is that the number of rows for df can be anything from 1 row to in the hundreds. I kept it to 2 to have minimal reproducible t<-seq(-5,24,0.1) #min(t) will always be <=df$c[1], which is the value that is always going to equal to min(df$c) times1 <- c(rbind(df$c[1],df$c[1]+df$a[1]),max(t)) #length of times1 will always be 3, see times2 is of length 4 input1 <- c(rbind(df$b[1]/df$a[1],rep(0,length(df$b[1]))),0) #length of input1 will always be 3, see input2 is of length 4 out1 <-data.frame(t,ifelse(t>=times1[1]=times1[2]=times2[1]=times2[2]=times2[3]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.
Re: [R] Q re: logical indexing with is.na
logical indexing requires the logical index to be of the same length as the vector being indexed. If it is not, then the index is wrapped to be of sufficient length. The result on line 3 is y[c(TRUE, TRUE, FALSE, TRUE)] where the last TRUE was originally the first component of !is.na(y[1:3]) Grant Izmirlian, Ph.D. Mathematical Statistician izmir...@mail.nih.gov Delivery Address: 9609 Medical Center Dr, RM 5E130 Rockville MD 20850 Postal Address: BG 9609 RM 5E130 MSC 9789 9609 Medical Center Dr Bethesda, MD 20892-9789 ofc: 240-276-7025 cell: 240-888-7367 fax: 240-276-7845 From: David Goldsmith Sent: Saturday, March 9, 2019 8:36 PM To: r-help@r-project.org Subject: [R] Q re: logical indexing with is.na Hi! Newbie (self-)learning R using P. Dalgaard's "Intro Stats w/ R"; not new to statistics (have had grad-level courses and work experience in statistics) or vectorized programming syntax (have extensive experience with MatLab, Python/NumPy, and IDL, and even a smidgen--a long time ago--of experience w/ S-plus). In exploring the use of is.na in the context of logical indexing, I've come across the following puzzling-to-me result: > y; !is.na(y[1:3]); y[!is.na(y[1:3])] [1] 0.3534253 -1.6731597 NA -0.2079209 [1] TRUE TRUE FALSE [1] 0.3534253 -1.6731597 -0.2079209 As you can see, y is a four element vector, the third element of which is NA; the next line gives what I would expect--T T F--because the first two elements are not NA but the third element is. The third line is what confuses me: why is the result not the two element vector consisting of simply the first two elements of the vector (or, if vectorized indexing in R is implemented to return a vector the same length as the logical index vector, which appears to be the case, at least the first two elements and then either NA or NaN in the third slot, where the logical indexing vector is FALSE): why does the implementation "go looking" for an element whose index in the "original" vector, 4, is larger than BOTH the largest index specified in the inner-most subsetting index AND the size of the resulting indexing vector? (Note: at first I didn't even understand why the result wasn't simply 0.3534253 -1.6731597 NA but then I realized that the third logical index being FALSE, there was no reason for *any* element to be there; but if there is, due to some overriding rule regarding the length of the result relative to the length of the indexer, shouldn't it revert back to *something* that indicates the "FALSE"ness of that indexing element?) Thanks! DLG > sessionInfo() R version 3.5.2 (2018-12-20) Platform: x86_64-apple-darwin15.6.0 (64-bit) Running under: macOS High Sierra 10.13.6 Matrix products: default BLAS: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRblas.0.dylib LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] ISwR_2.0-7 loaded via a namespace (and not attached): [1] compiler_3.5.2 tools_3.5.2 [[alternative HTML version deleted]] [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.