GGally::ggpairs `Error: 'is_ggplot' is not an exported object from 'namespace:ggplot2'`

[benyamindsmith]

Just ran this on my machine and I ran the example:

### ** Examples

# small function to display plots only if it's interactive
p_ <- GGally::print_if_interactive


## Quick example, with and without colour
data(flea)
ggpairs(flea, columns = 2:4)
Error: 'is_ggplot' is not an exported object from 'namespace:ggplot2'

[schloerke]

Thank you for the reprex!

Sorry about the hassle. I'll get a fix here soon

[schloerke]

Hmmmmm. In the description file, ggplot2 has a min version of 3.5.2. ggplot2 v3.5.2 has is_ggplot(x) exported.

@benyamindsmith Can you please supply me your packageDescription("ggplot2") and packageDescription("GGally")? Thank you

[littlemingone]

I got the extactly same error. And I'm pretty sure I'm using ggplot2 v3.5.2 . I think the error is caused by ggplot2 itself. Maybe a library with some wrong?.Because I can't call the ggplot2:::is_ggplot, even with 3 :. Which cause the error.

Here is the trackback of the error.

But it dosen't act like that all the time.
When I started another new and pure R terminal, the ggtable function work prefectly and of couse, ggplot2::is_ggplot found the correct function!
The packageDes was gained in the bug reported terminal.

packageDescription

 
\> packageDescription('ggplot2')
Package: ggplot2
Version: 3.5.2
Title: Create Elegant Data Visualisations
    Using the Grammar of Graphics
Authors@R: c( person("Hadley", "Wickham", ,       
    "hadley@posit.co", role = "aut",
    comment = c(ORCID =
    "0000-0003-4757-117X")),
    person("Winston", "Chang", role =
    "aut", comment = c(ORCID =
    "0000-0002-1576-2126")),
    person("Lionel", "Henry", role =
    "aut"), person("Thomas Lin",
    "Pedersen", ,
    "thomas.pedersen@posit.co", role =
    c("aut", "cre"), comment = c(ORCID =
    "0000-0002-5147-4711")),
    person("Kohske", "Takahashi", role =
    "aut"), person("Claus", "Wilke", role
    = "aut", comment = c(ORCID =
    "0000-0002-7470-9261")),
    person("Kara", "Woo", role = "aut",
    comment = c(ORCID =
    "0000-0002-5125-4188")),
    person("Hiroaki", "Yutani", role =
    "aut", comment = c(ORCID =
    "0000-0002-3385-7233")),
    person("Dewey", "Dunnington", role =
    "aut", comment = c(ORCID =
    "0000-0002-9415-4582")),
    person("Teun", "van den Brand", role =        
    "aut", comment = c(ORCID =
    "0000-0002-9335-7468")),
    person("Posit, PBC", role = c("cph",
    "fnd")) )
Description: A system for 'declaratively'
    creating graphics, based on "The
    Grammar of Graphics". You provide the
    data, tell 'ggplot2' how to map
    variables to aesthetics, what
    graphical primitives to use, and it
    takes care of the details.
License: MIT + file LICENSE
URL: https://ggplot2.tidyverse.org,
    https://github.com/tidyverse/ggplot2
BugReports:
    https://github.com/tidyverse/ggplot2/issues   
Depends: R (>= 3.5)
Imports: cli, glue, grDevices, grid, gtable       
    (>= 0.1.1), isoband, lifecycle (>
    1.0.1), MASS, mgcv, rlang (>= 1.1.0),
    scales (>= 1.3.0), stats, tibble,
    vctrs (>= 0.6.0), withr (>= 2.5.0)
Suggests: covr, dplyr, ggplot2movies,
    hexbin, Hmisc, knitr, mapproj, maps,
    multcomp, munsell, nlme, profvis,
    quantreg, ragg (>= 1.2.6),
    RColorBrewer, rmarkdown, rpart, sf (>=        
    0.7-3), svglite (>= 2.1.2), testthat
    (>= 3.1.2), vdiffr (>= 1.0.6), xml2
Enhances: sp
VignetteBuilder: knitr
Config/Needs/website: ggtext, tidyr,
    forcats, tidyverse/tidytemplate
Config/testthat/edition: 3
Encoding: UTF-8
LazyData: true
RoxygenNote: 7.3.2
Collate: 'ggproto.R' 'ggplot-global.R'
    'aaa-.R' .....
NeedsCompilation: no
Packaged: 2025-04-08 10:58:01 UTC; thomas
Author: Hadley Wickham [aut]
    (),    
    Winston Chang [aut]
    (),    
    Lionel Henry [aut], Thomas Lin
    Pedersen [aut, cre]
    (),    
    Kohske Takahashi [aut], Claus Wilke
    [aut]
    (),    
    Kara Woo [aut]
    (),    
    Hiroaki Yutani [aut]
    (),    
    Dewey Dunnington [aut]
    (),    
    Teun van den Brand [aut]
    (),    
    Posit, PBC [cph, fnd]
Maintainer: Thomas Lin Pedersen
    
Repository: CRAN
Date/Publication: 2025-04-09 09:40:10 UTC
Built: R 4.4.3; ; 2025-08-04 02:16:56 UTC;        
    windows
-- File: E:/Program/miniforge3/envs/R-4.4.1/lib/R/library/ggplot2/Meta/package.rds
> packageDescription('GGally')

Type: Package

Package: GGally

Title: Extension to 'ggplot2'

Version: 2.3.0

Authors@R: c( person("Barret", "Schloerke",

, "schloerke@gmail.com", role =

c("aut", "cre"), comment = c(ORCID =

"0000-0001-9986-114X")), person("Di",

"Cook", , "dicook@monash.edu", role =

c("aut", "ths"), comment = c(ORCID =

"0000-0002-3813-7155")),

person("Joseph", "Larmarange", ,

"joseph@larmarange.net", role = "aut",

comment = c(ORCID =

"0000-0001-7097-700X")),

person("Francois", "Briatte", ,

"f.briatte@gmail.com", role = "aut"),

person("Moritz", "Marbach", ,

"mmarbach@mail.uni-mannheim.de", role

= "aut"), person("Edwin", "Thoen", ,

"edwinthoen@gmail.com", role = "aut"),

person("Amos", "Elberg", ,

"amos.elberg@gmail.com", role =

"aut"), person("Ott", "Toomet", ,

"otoomet@gmail.com", role = "ctb"),

person("Jason", "Crowley", ,

"crowley.jason.s@gmail.com", role =

"aut"), person("Heike", "Hofmann", ,

"hhofmann4@unl.edu", role = "ths",

comment = c(ORCID =

"0000-0001-6216-5183")),

person("Hadley", "Wickham", ,

"h.wickham@gmail.com", role = "ths",

comment = c(ORCID =

"0000-0003-4757-117X")) )

Description: The R package 'ggplot2' is a

plotting system based on the grammar

of graphics.  'GGally' extends

'ggplot2' by adding several functions

to reduce the complexity of combining

geometric objects with transformed

data.  Some of these functions include

a pairwise plot matrix, a two group

pairwise plot matrix, a parallel

coordinates plot, a survival plot, and

several functions to plot networks.

License: GPL (>= 2.0)

URL: https://ggobi.github.io/ggally/,

https://github.com/ggobi/ggally

BugReports:

https://github.com/ggobi/ggally/issues

Depends: ggplot2 (>= 3.5.2), R (>= 4.3)

Imports: dplyr (>= 1.1.0), ggstats (>=

0.9.0), grDevices, grid, gtable (>=

0.2.0), lifecycle, magrittr, progress,

RColorBrewer, rlang, S7 (>= 0.2.0),

scales (>= 1.3.0), tidyr (>= 1.3.0),

utils

Suggests: broom (>= 0.7.0), broom.helpers

(>= 1.3.0), chemometrics, crosstalk,

emmeans, geosphere (>= 1.5-1),

ggforce, Hmisc, igraph (>= 1.0.1),

intergraph (>= 2.0-2), knitr,

labelled, mapproj, maps (>= 3.1.0),

network (>= 1.17.1), nnet, rmarkdown,

scagnostics, sna (>= 2.3-2), spelling,

survival, testthat (>= 3.0.0), vdiffr

RdMacros: lifecycle

Config/Needs/website:

tidyverse/tidytemplate

Config/testthat/edition: 3

Config/usethis/last-upkeep: 2025-06-13

Encoding: UTF-8

Language: en-US

LazyData: true

LazyLoad: yes

RoxygenNote: 7.3.2

SystemRequirements: openssl

Collate: 'GGally-package.R' .....

NeedsCompilation: no

Packaged: 2025-07-17 16:24:06 UTC; barret

Author: Barret Schloerke [aut, cre] (ORCID:

https://orcid.org/0000-0001-9986-114X),

Di Cook [aut, ths] (ORCID:

https://orcid.org/0000-0002-3813-7155),

Joseph Larmarange [aut] (ORCID:

https://orcid.org/0000-0001-7097-700X),

Francois Briatte [aut], Moritz Marbach

[aut], Edwin Thoen [aut], Amos Elberg

[aut], Ott Toomet [ctb], Jason Crowley

[aut], Heike Hofmann [ths] (ORCID:

https://orcid.org/0000-0001-6216-5183),

Hadley Wickham [ths] (ORCID:

https://orcid.org/0000-0003-4757-117X)

Maintainer: Barret Schloerke

schloerke@gmail.com

Repository: CRAN

Date/Publication: 2025-07-18 08:40:18 UTC

Built: R 4.4.3; ; 2025-08-04 03:40:51 UTC;

windows
-- File: E:/Program/miniforge3/envs/R-4.4.1/lib/R/library/GGally/Meta/package.rds

[schloerke]

@littlemingone Thank you for your traceback!

The line is probably pointing to https://github.com/ggobi/ggally/blame/5a9007c29e42cd85887c073a6e0ea827571ce41e/R/ggpairs_getput.R#L95 . It is the only mention of is_ggplot() within the getPlot() function.

if (ggplot2::is_ggplot(plotObj)) {

The function call is namespaced. So it should always be found.

---

If packages are installed while other R sessions are still running, odd things can happen. It is usually best to restart your R session if any new packages are installed after they have already being loaded in the current R session.

If you can make a reproducible error using reprex::reprex() / a fresh R session, I'd love to fix it! Thank you

[benyamindsmith]

@schloerke it might be helpful to accomodate backwards compatibility with `ggplot2::is.ggplot` alternatively maybe add some `tryCatch` magic to prompt the user to update ggplot2 to the latest version. If desired I can write the PR.

[littlemingone]

@littlemingone Thank you for your traceback!

The line is probably pointing to https://github.com/ggobi/ggally/blame/5a9007c29e42cd85887c073a6e0ea827571ce41e/R/ggpairs_getput.R#L95 . It is the only mention of is_ggplot() within the getPlot() function.

if (ggplot2::is_ggplot(plotObj)) {

The function call is namespaced. So it should always be found.

If packages are installed while other R sessions are still running, odd things can happen. It is usually best to restart your R session if any new packages are installed after they have already being loaded in the current R session.

If you can make a reproducible error using reprex::reprex() / a fresh R session, I'd love to fix it! Thank you

OK I guess it is because I installed while other R sessions are running. In fresh R session, it work fine.