3/6 Want to shuffle who belongs to each group? Plots(type = "partition") reassigns observations while keeping the group sizes fixed. Here’s one random reassignment of jackal mandible lengths and the resulting group means.
![library("permute")
data(jackal, package = "permute")
set.seed(42)
design <- how(plots = Plots(~ Sex, type = "partition"),
data = jackal)
idx <- shuffle(nrow(jackal), control = design)
# Reassign lengths to the existing group slots.
tapply(jackal$Length[idx], jackal$Sex, mean)](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:vyspvwpd2wp4rt3sg3guwefm/bafkreihs7ztupsnkrvriiqwsy25iuarkmfoeyo4j5ecubhf5ruvgmfrtfu)
November 9, 2026 at 10:00 AM
3/6 Want to shuffle who belongs to each group? Plots(type = "partition") reassigns observations while keeping the group sizes fixed. Here’s one random reassignment of jackal mandible lengths and the resulting group means.
#jourapnal #book20 day 77
20261014Wed
#3goodthings #tapply #aew #wwe #3badthings
#decycled #overbearing #controlove
(tv sketch)
Yk lost a tv byt wanted wrestling
the agassi book is intrigueing
sometimes
i think back
20261014Wed
#3goodthings #tapply #aew #wwe #3badthings
#decycled #overbearing #controlove
(tv sketch)
Yk lost a tv byt wanted wrestling
the agassi book is intrigueing
sometimes
i think back
October 15, 2026 at 3:05 AM
#jourapnal #book20 day 77
20261014Wed
#3goodthings #tapply #aew #wwe #3badthings
#decycled #overbearing #controlove
(tv sketch)
Yk lost a tv byt wanted wrestling
the agassi book is intrigueing
sometimes
i think back
20261014Wed
#3goodthings #tapply #aew #wwe #3badthings
#decycled #overbearing #controlove
(tv sketch)
Yk lost a tv byt wanted wrestling
the agassi book is intrigueing
sometimes
i think back
No curso de Programação em R, traduzi as lições Olhando os Dados, lapply e sapply, vapply e tapply. Também corrigi o caminho dos dados que impedia três lições de abrir depois de instaladas.
September 17, 2026 at 3:27 PM
No curso de Programação em R, traduzi as lições Olhando os Dados, lapply e sapply, vapply e tapply. Também corrigi o caminho dos dados que impedia três lições de abrir depois de instaladas.
September 2, 2026 at 3:51 AM
John Lescroart (series w/attorney Dismas Hardy—San Francisco-set); William G. Tapply (series w/attorney Brady Coyne—Boston-set); John Straley's Alaska-set bks; Elsa Hart's _Jade Dragon Mountain_ (18C China)
August 27, 2026 at 9:39 PM
John Lescroart (series w/attorney Dismas Hardy—San Francisco-set); William G. Tapply (series w/attorney Brady Coyne—Boston-set); John Straley's Alaska-set bks; Elsa Hart's _Jade Dragon Mountain_ (18C China)
I didn’t make this, but it is amaze. Well, maybe Lawful Evil needs to involve tapply, but...
November 24, 2024 at 3:22 AM
I didn’t make this, but it is amaze. Well, maybe Lawful Evil needs to involve tapply, but...
Going through old R folders on my PC, I found a couple of "Intro to R" presentations from the 2011 NICAR data journalism conference. Before RStudio was generally available. Before dplyr. Pretty different from how most journalists use #RStats today! 😅
From @peteraldhous.com at @ire.org #NICAR
From @peteraldhous.com at @ire.org #NICAR
December 9, 2025 at 1:12 AM
Going through old R folders on my PC, I found a couple of "Intro to R" presentations from the 2011 NICAR data journalism conference. Before RStudio was generally available. Before dplyr. Pretty different from how most journalists use #RStats today! 😅
From @peteraldhous.com at @ire.org #NICAR
From @peteraldhous.com at @ire.org #NICAR
here's a gentler one, courtesy of MY teacher, Bill Tapply, who on hot days would set ice-cold beers at intervals around his lawn. whenever he reached one, he'd stop and drink it and watch the clouds. find your beers, then mow to 'em.
June 27, 2024 at 8:16 AM
here's a gentler one, courtesy of MY teacher, Bill Tapply, who on hot days would set ice-cold beers at intervals around his lawn. whenever he reached one, he'd stop and drink it and watch the clouds. find your beers, then mow to 'em.
On father's day, thinking of the late, great Bill Tapply, who very kindly, patiently beat into me while I was at college that writing was work and work has to be finished for the craftsman to improve. After a year in his class, his final note to me was just "You've got what it takes". Thanks, Bill.
June 16, 2024 at 4:47 PM
On father's day, thinking of the late, great Bill Tapply, who very kindly, patiently beat into me while I was at college that writing was work and work has to be finished for the craftsman to improve. After a year in his class, his final note to me was just "You've got what it takes". Thanks, Bill.
FICTION
The Return of the Soldier (1918), Rebecca West
Brideshead Revisited (1945), Evelyn Waugh
The Folded Leaf (1945), William Maxwell
Mendelssohn Is on the Roof (1959), Jiří Weil
Gray Ghost (2007), William G. Tapply
The Guest Lecture (2023), Martin Riker
The Return of the Soldier (1918), Rebecca West
Brideshead Revisited (1945), Evelyn Waugh
The Folded Leaf (1945), William Maxwell
Mendelssohn Is on the Roof (1959), Jiří Weil
Gray Ghost (2007), William G. Tapply
The Guest Lecture (2023), Martin Riker
March 2, 2024 at 12:00 AM
FICTION
The Return of the Soldier (1918), Rebecca West
Brideshead Revisited (1945), Evelyn Waugh
The Folded Leaf (1945), William Maxwell
Mendelssohn Is on the Roof (1959), Jiří Weil
Gray Ghost (2007), William G. Tapply
The Guest Lecture (2023), Martin Riker
The Return of the Soldier (1918), Rebecca West
Brideshead Revisited (1945), Evelyn Waugh
The Folded Leaf (1945), William Maxwell
Mendelssohn Is on the Roof (1959), Jiří Weil
Gray Ghost (2007), William G. Tapply
The Guest Lecture (2023), Martin Riker
Thanks! I find these solutions to be the fastest, but as the number of summary statistics increases, the tapply() method slows down because of repeated function calls.
June 4, 2026 at 6:09 PM
Thanks! I find these solutions to be the fastest, but as the number of summary statistics increases, the tapply() method slows down because of repeated function calls.
Thanks! I suppose the only direct way is to use the by() function. It is slower than tapply(), aggregate(), and the split-apply-do.call approach, but still faster than using {dplyr}.
June 4, 2026 at 6:08 PM
Thanks! I suppose the only direct way is to use the by() function. It is slower than tapply(), aggregate(), and the split-apply-do.call approach, but still faster than using {dplyr}.
Resisting the urge to enter lapply, tapply, and rapply.
November 3, 2024 at 1:03 PM
Resisting the urge to enter lapply, tapply, and rapply.
"Je ne sais pas ce qui est pire. Ne pas savoir ce qui s'est produit dans ta vie jusqu'à maintenant, ou savoir exactement tout ce qui t'arrivera jusqu'à ta mort."
William G. Tapply, Dérive sanglante
#thriller
William G. Tapply, Dérive sanglante
#thriller
January 17, 2025 at 5:38 PM
"Je ne sais pas ce qui est pire. Ne pas savoir ce qui s'est produit dans ta vie jusqu'à maintenant, ou savoir exactement tout ce qui t'arrivera jusqu'à ta mort."
William G. Tapply, Dérive sanglante
#thriller
William G. Tapply, Dérive sanglante
#thriller
An #Rstats confession: I tried to use tapply() a while back and couldn't, for the life of me, remember how to use it. So my assimilation into the tidyverse is apparently complete.
November 16, 2024 at 8:51 PM
An #Rstats confession: I tried to use tapply() a while back and couldn't, for the life of me, remember how to use it. So my assimilation into the tidyverse is apparently complete.
Yesterday in this thread I joked about using tapply, an allusion to my views on the tidyverse matloff.github.io/TidyverseSkeptic. But I realize now that I may have confused some people by using negative subscripts (see above). Let me know if anything in my code was unclear.
Redirect to Skeptic.html
matloff.github.io
April 30, 2025 at 5:31 PM
Yesterday in this thread I joked about using tapply, an allusion to my views on the tidyverse matloff.github.io/TidyverseSkeptic. But I realize now that I may have confused some people by using negative subscripts (see above). Let me know if anything in my code was unclear.
With a wage imbalance among occs.
> tapply(svcensus$wageinc,svcensus$occ,mean)
100 101 102 106 140 141
50396.47 51373.53 68797.72 53639.86 67019.26 69494.44
(Apologies to those horrified by 'tapply'. :-) 6/
> tapply(svcensus$wageinc,svcensus$occ,mean)
100 101 102 106 140 141
50396.47 51373.53 68797.72 53639.86 67019.26 69494.44
(Apologies to those horrified by 'tapply'. :-) 6/
April 29, 2025 at 8:23 PM
With a wage imbalance among occs.
> tapply(svcensus$wageinc,svcensus$occ,mean)
100 101 102 106 140 141
50396.47 51373.53 68797.72 53639.86 67019.26 69494.44
(Apologies to those horrified by 'tapply'. :-) 6/
> tapply(svcensus$wageinc,svcensus$occ,mean)
100 101 102 106 140 141
50396.47 51373.53 68797.72 53639.86 67019.26 69494.44
(Apologies to those horrified by 'tapply'. :-) 6/
Wrangling Data with R: A Guide to the tapply() Function
"Introduction
Hey R enthusiasts! Today we’re diving into the world of data manipulation with a fantastic function called tapply(). This little gem le..."
https://www.r-bloggers.com/2024/03/wrangling-data-with-r-a-guide-to-the-tapply-function/
"Introduction
Hey R enthusiasts! Today we’re diving into the world of data manipulation with a fantastic function called tapply(). This little gem le..."
https://www.r-bloggers.com/2024/03/wrangling-data-with-r-a-guide-to-the-tapply-function/
Wrangling Data with R: A Guide to the tapply() Function
Introduction
Hey R enthusiasts! Today we’re diving into the world of data manipulation with a fantastic function called tapply(). This little gem lets you apply a function of your choice to different ...
www.r-bloggers.com
March 25, 2024 at 4:00 AM
Wrangling Data with R: A Guide to the tapply() Function
"Introduction
Hey R enthusiasts! Today we’re diving into the world of data manipulation with a fantastic function called tapply(). This little gem le..."
https://www.r-bloggers.com/2024/03/wrangling-data-with-r-a-guide-to-the-tapply-function/
"Introduction
Hey R enthusiasts! Today we’re diving into the world of data manipulation with a fantastic function called tapply(). This little gem le..."
https://www.r-bloggers.com/2024/03/wrangling-data-with-r-a-guide-to-the-tapply-function/
Conquering R’s Apply Family: Your Guide to apply(), lapply(), sapply(), and tapply()
"Introduction
Welcome, fellow R warriors! Today, we delve into the heart of vectorized operations wit..."
https://www.r-bloggers.com/2024/02/conquering-rs-apply-family-your-guide-to-apply-lapply-sapply-and-tapply/
"Introduction
Welcome, fellow R warriors! Today, we delve into the heart of vectorized operations wit..."
https://www.r-bloggers.com/2024/02/conquering-rs-apply-family-your-guide-to-apply-lapply-sapply-and-tapply/
Conquering R’s Apply Family: Your Guide to apply(), lapply(), sapply(), and tapply()
Introduction
Welcome, fellow R warriors! Today, we delve into the heart of vectorized operations with R’s “apply” family: apply(), lapply(), sapply(), and tapply(). These functions are your secret wea...
www.r-bloggers.com
February 15, 2024 at 5:00 AM
Conquering R’s Apply Family: Your Guide to apply(), lapply(), sapply(), and tapply()
"Introduction
Welcome, fellow R warriors! Today, we delve into the heart of vectorized operations wit..."
https://www.r-bloggers.com/2024/02/conquering-rs-apply-family-your-guide-to-apply-lapply-sapply-and-tapply/
"Introduction
Welcome, fellow R warriors! Today, we delve into the heart of vectorized operations wit..."
https://www.r-bloggers.com/2024/02/conquering-rs-apply-family-your-guide-to-apply-lapply-sapply-and-tapply/
apply functions in R. Excellent tutorial. http://stackoverflow.com/questions/3505701/r-grouping-functions-sapply-vs-lapply-vs-apply-vs-tapply-vs-by-vs-aggrega/7141669#7141669
Grouping functions (tapply, by, aggregate) and the *apply family
Whenever I want to do something "map"py in R, I usually try to use a function in the apply family.
However, I've never quite understood the differences between them -- how {sapply, lapply, etc.} ...
stackoverflow.com
January 28, 2025 at 6:11 PM
apply functions in R. Excellent tutorial. http://stackoverflow.com/questions/3505701/r-grouping-functions-sapply-vs-lapply-vs-apply-vs-tapply-vs-by-vs-aggrega/7141669#7141669
Teaching R to New Users - From tapply to the Tidyverse · Simply Statistics https://simplystatistics.org/2018/07/12/use-r-keynote-2018/
Page not found · GitHub Pages
simplystatistics.org
November 30, 2024 at 2:57 PM
Teaching R to New Users - From tapply to the Tidyverse · Simply Statistics https://simplystatistics.org/2018/07/12/use-r-keynote-2018/
I guess I’ll tapply over there then
November 16, 2024 at 7:15 PM
I guess I’ll tapply over there then
Lesson 19 — The apply Family
sapply, lapply, apply and tapply - loops without loops.
Watch with runnable code: rverseanalytics.com/learn/apply
sapply, lapply, apply and tapply - loops without loops.
Watch with runnable code: rverseanalytics.com/learn/apply
August 8, 2026 at 11:47 AM
Lesson 19 — The apply Family
sapply, lapply, apply and tapply - loops without loops.
Watch with runnable code: rverseanalytics.com/learn/apply
sapply, lapply, apply and tapply - loops without loops.
Watch with runnable code: rverseanalytics.com/learn/apply
I have also seen, from people who know base really well, incredibly elegant code using tapply, merge, and clever indexing. But, in my experience, the typical code of a medium experienced person that uses the tidyverse is more robust than the one that uses base.
March 5, 2026 at 7:58 AM
I have also seen, from people who know base really well, incredibly elegant code using tapply, merge, and clever indexing. But, in my experience, the typical code of a medium experienced person that uses the tidyverse is more robust than the one that uses base.