Package: ACRER 1.0.1

ACRER: Accessibility for Recreation in R

Recreation model that simulates household types, group types, expected visiting duration, and total visits from city zip codes to surrounding destination areas. The methodology is based on the accessibility model described in Bervaes et al. (1996) "Een model voor het gebruik van de groene ruimte in stadslandschappen (Fase I)" <https://www.wur.nl/en/library>, with optimization procedures based on Goldfarb and Idnani (1983) <doi:10.1007/BF02591962> and Vanderbei et al. (1986) <doi:10.1007/BF01840454>.

Authors:Georgios Martakis [aut, cre], Jan Bervaes [ctb], Bert van der Werf [ctb]

ACRER_1.0.1.tar.gz
ACRER_1.0.1.zip(r-4.7-any)ACRER_1.0.1.zip(r-4.6-any)ACRER_1.0.1.zip(r-4.5-any)
ACRER_1.0.1.tgz(r-4.6-any)ACRER_1.0.1.tgz(r-4.5-any)
ACRER_1.0.1.tar.gz(r-4.7-any)ACRER_1.0.1.tar.gz(r-4.6-any)
ACRER_1.0.1.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
DESCRIPTION
card.svg |card.png
ACRER/json (API)

# Install 'ACRER' in R:

install.packages('ACRER', repos = c('https://martakis.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/martakis/acrer/issues

On CRAN:

3.70 score 199 downloads 16 exports 65 dependencies

Last updated from:a79637f7b8. Checks:7 WARNING, 2 OK. Indexed: yes.

Target	Result	Time
linux-devel	WARNING	203
source / vignettes	OK	296
linux-release	WARNING	199
macos-release	WARNING	187
macos-oldrel	WARNING	216
windows-devel	WARNING	105
windows-release	WARNING	135
windows-oldrel	WARNING	110
wasm-release	OK	152

Exports:%>%generate_pivot NGroup0 NGroup1 NGroup2 NGroup3 NGroup4 percent_EVD_Recr percent_EVD_zip_code percent_GT_EVD_pivot percent_GT_NV_pivot percent_NV_Recr percent_NV_zip_code run_Acrer_model Run_Queries wageningen_conn

Dependencies:base64enc bit bit64 blob bslib cachem chron class classInt cli cpp11 data.table DBI digest dplyr e1071 evaluate fastmap fontawesome fs generics glue gsubfn highr htmltools htmlwidgets jquerylib jsonlite KernSmooth knitr lifecycle magrittr memoise mime pillar pivottabler pkgconfig plyr pracma proto proxy quadprog R6 rappdirs Rcpp reshape2 rlang rmarkdown RSQLite s2 sass sf sqldf stringi stringr tibble tidyselect tinytex units utf8 vctrs withr wk xfun yaml

Accessibility Model for Urban Recreation (ACRER) Vignette

Rendered fromACRER_vignette.Rmdusingknitr::rmarkdown

Last update: 2026-10-10
Started: 2026-10-10

Help page	Topics
combination function to obtain at random c3 matrices	combinations
crosstab function. `crosstab function` Function to compute the group numbers of recreation area with the same activities on the same time segments or to compute the column createused for the group numbers of recreation areas and the activities pattern on the same time segment.	crosstab
function to compute the expected visit duration per recreation area.	expected_visit_duration
Generate a Pivot Table by Recreation Area and Zip Code	generate_pivot
NGroup0 computes the group numbers of recreation areas where all the sequence(s) of their presences (1) on the combination of activities pattern and time segment are NOT interrupted by absences (0). Thus in this case we have 1 group of ones (presences).	NGroup0
NGroup1 computes the group numbers of recreation areas where all the sequence(s) of their presences (1) on the combination of activities pattern and time segment are only once interrupted by their absence (0). Thus in this case we have two groups of ones (presences).	NGroup1
NGroup2 computes the group numbers of recreation areas where all the sequence(s) of their presences (1) on the combination of activities pattern and time segment are only twice interrupted by their absences (0). Thus in this case we have three groups of ones (presences).	NGroup2
NGroup3 computes the group numbers of recreation areas where all the sequence(s) of their presences (1) on the combination of activities pattern and time segment are three times interrupted by absences (0). Thus in this case we have four groups of one (presence).	NGroup3
NGroup4 computes the group numbers of recreation areas where all the sequence(s) of their presences (1) on the combination of activities pattern and time segment are four times interrupted by absences (0). Thus in this case we have five groups of one (presences).	NGroup4
Generate Percentage of Expected Visiting Duration per Recreation Area	percent_EVD_Recr
Generate Percentage of Expected Visiting Duration per Zip Code	percent_EVD_zip_code
Generate Percentage of Grand Total Expected Visiting Duration	percent_GT_EVD_pivot
Generate Percentage of Grand Total Number of Visits	percent_GT_NV_pivot
Generate Percentage of Number of Visits per Recreation Area	percent_NV_Recr
Generate Percentage of Number of Visits per Zip Code	percent_NV_zip_code
Model ACRER (Wageningen_SQLite_2023) Main function for the model ACRER.	run_Acrer_model
Run Queries	Run_Queries
Open a connection to the Wageningen SQLite DB	wageningen_conn

Package: ACRER 1.0.1

ACRER: Accessibility for Recreation in R

Citation

Development and contributors

Readme and manuals

Help Manual

Usage by other packages (reverse dependencies)