Thanks a lot - almost there! --8<---------------cut here---------------start------------->8--- format.summary.difftime <- function(sd, ...) { t <- matrix(sd$string) rownames(t) <- rownames(sd) print(t) format(as.table(t)) } print.summary.difftime <- function (sd, ...) { print(format(sd), quote=FALSE) invisible(sd) } --8<---------------cut here---------------end--------------->8---
this almost works: --8<---------------cut here---------------start------------->8--- > summary(delays) share.id min max 12cf12372b87cce9: 1 NULL:492.00 ms NULL:492.00 ms 12cf36060bdb9581: 1 NULL:3.70 min NULL:21.80 min 12d2665c906bb232: 1 NULL:20.32 min NULL:3.26 hrs 12d2802f1435b4cd: 1 NULL:5.52 hrs NULL:13.78 hrs 12d292988f5f8422: 1 NULL:2.81 hrs NULL:16.20 hrs 12d29dd2894e2790: 1 NULL:6.95 days NULL:6.98 days --8<---------------cut here---------------end--------------->8--- why do I see NULLs?! --8<---------------cut here---------------start------------->8--- > t <- matrix(sd$string) > rownames(t) <- rownames(sd) > t [,1] Min. "492.00 ms" 1st Qu. "3.70 min" Median "20.32 min" Mean "5.52 hrs" 3rd Qu. "2.81 hrs" Max. "6.95 days" > as.table(t) A Min. 492.00 ms 1st Qu. 3.70 min Median 20.32 min Mean 5.52 hrs 3rd Qu. 2.81 hrs Max. 6.95 days > format(as.table(t)) A Min. "492.00 ms" 1st Qu. "3.70 min " Median "20.32 min" Mean "5.52 hrs " 3rd Qu. "2.81 hrs " Max. "6.95 days" > --8<---------------cut here---------------end--------------->8--- > * William Dunlap <jqha...@gvopb.pbz> [2012-11-26 23:02:48 +0000]: > > It looks like summary.data.frame(d) calls format(d[[i]]) for i in > seq_len(ncol(d)) > and pastes the results together into a "table" object for printing. Hence, > write > a format.summary.difftime if you want objects of class "summary.difftime" > (which > I assume summary.difftime produces) to be formatted as you wish when a > difftime object is in a data.frame. Once you've written it, have your > print.summary.difftime > call it too. > > E.g., with the following methods > summary.difftime <- function(x, ...) { > ret <- quantile(x, p=(0:2)/2, na.rm=TRUE) > class(ret) <- c("summary.difftime", class(ret)) > ret > } > format.summary.difftime <- function(x, ...) c(Min.Med.Max = > paste(collapse="...", NextMethod("format"))) > print.summary.difftime <- function(x, ...){ print(format(x), quote=FALSE) ; > invisible(x) } > > I get >> d <- data.frame(Num=1:5, Date=as.Date("2012-11-26")+(0:4), >> Delta=diff(as.Date("2012-11-26")+2^(0:5))) >> summary(d) > Num Date Delta > Min. :1 Min. :2012-11-26 Min.Med.Max: 1 days... 4 days...16 days > 1st Qu.:2 1st Qu.:2012-11-27 > Median :3 Median :2012-11-28 > Mean :3 Mean :2012-11-28 > 3rd Qu.:4 3rd Qu.:2012-11-29 > Max. :5 Max. :2012-11-30 >> summary(d$Delta) > Min.Med.Max > 1 days... 4 days...16 days > > My summary.difftime inherits from difftime so the format method is not really > needed, as format.difftime does a reasonable job (except that it does not copy > the input names to its output). I put it in to show how it gets called. > > > Bill Dunlap > Spotfire, TIBCO Software > wdunlap tibco.com > > >> -----Original Message----- >> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On >> Behalf >> Of Sam Steingold >> Sent: Monday, November 26, 2012 2:20 PM >> To: r-help@r-project.org; David Winsemius >> Subject: Re: [R] printing difftime summary >> >> > * David Winsemius <qjvafrz...@pbzpnfg.arg> [2012-11-26 08:46:35 -0800]: >> > >> > On Nov 26, 2012, at 7:14 AM, Sam Steingold wrote: >> > >> >> summary(infl), where infl$delay is a difftime vector, prints >> >> >> >> ... >> >> >> >> delay >> >> string:c("492.00 ms", "18.08 min", "1.77 hrs", "8.20 hrs", "8.13 hrs", >> >> "6.98 days") >> >> secs :c(" 0.5", " 1085.1", " 6370.2", " 29534.4", " 29254.0", >> >> "602949.7") >> >> >> >> >> >> >> >> instead of something like >> >> >> >> delay >> >> Min.: 492 ms >> >> 1st Qu.: 18.08 min >> >> >> >> &c >> >> >> >> so, how do I arrange for a proper printing of difftime summary as a >> >> part >> >> of the data frame summary? >> > >> > If you like a particular format from an existing print method then why >> > not look it up and copy the code? >> > >> > methods(print) >> >> the problem is that I cannot figure out which function prints this: >> >> >> delay >> >> string:c("492.00 ms", "18.08 min", "1.77 hrs", "8.20 hrs", "8.13 hrs", >> >> "6.98 days") >> >> secs :c(" 0.5", " 1085.1", " 6370.2", " 29534.4", " 29254.0", >> >> "602949.7") >> >> I added cat()s to print.summary.difftime and I do not see them, so it >> appears that I have no direct control over how a summary.difftime is >> printed as a part of a summary of a data.frame. >> >> >> --8<---------------cut here---------------start------------->8--- >> summary.difftime <- function (v, ...) { >> s <- summary(as.numeric(v), ...) >> r <- as.data.frame(sapply(s,difftime2string),stringsAsFactors=FALSE) >> names(r) <- c("string") >> r[[units(v)]] <- s >> class(r) <- c("summary.difftime","data.frame") >> invisible(r) >> } >> print.summary.difftime <- function (sd, ...) { >> cat("[[[print.summary.difftime]]]\n") >> print(list(...)) >> print.data.frame(sd, ...) >> } >> --8<---------------cut here---------------end--------------->8--- >> >> -- >> Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X >> 11.0.11103000 >> http://www.childpsy.net/ http://palestinefacts.org http://think-israel.org >> http://www.memritv.org http://openvotingconsortium.org >> http://mideasttruth.com >> The force of gravity doubles when acting on a body on a couch. >> >> ______________________________________________ >> R-help@r-project.org 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. -- Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X 11.0.11103000 http://www.childpsy.net/ http://openvotingconsortium.org http://ffii.org http://www.memritv.org http://americancensorship.org There are two ways to write error-free programs; only the third one works. ______________________________________________ R-help@r-project.org 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.