Hey @ang-zhao - can you provide some clarification on the cadence bands calculation?
I believe we were using https://bjsm.bmj.com/content/52/12/776.abstract to calculate these bands, correct?
Fo
It seems like the cutoffs are different and some are misclassified (e.g. 1 is classified as zero). I believe this may be due to the behavior of cut when right = TRUE (default) in
|
breaks = c(0, 1, 19, 29, 49, 59, 79, 89, 99, 119, Inf), |
library(dplyr)
#>
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#>
#> filter, lag
#> The following objects are masked from 'package:base':
#>
#> intersect, setdiff, setequal, union
library(cadence)
df = data.frame(
steps = c(
rep(0, 2),
rep(1, 3),
rep(15, 4),
rep(19, 5),
rep(20, 5),
rep(25, 6),
rep(29, 7),
rep(30, 5),
rep(35, 8),
rep(49, 9),
rep(50, 5),
rep(55, 10),
rep(59, 11),
rep(60, 5),
rep(75, 12),
rep(79, 13),
rep(80, 5),
rep(85, 14),
rep(89, 15),
rep(90, 5),
rep(95, 16),
rep(99, 17),
rep(100, 5),
rep(105, 18),
rep(119, 19),
rep(125, 20)
)
)
bands = df %>%
compute_cadence_bands()
bands %>% count(steps, cadence_band)
#> steps cadence_band n
#> 1 0 zero 2
#> 2 1 zero 3
#> 3 15 incidental 4
#> 4 19 incidental 5
#> 5 20 sporadic 5
#> 6 25 sporadic 6
#> 7 29 sporadic 7
#> 8 30 purposeful 5
#> 9 35 purposeful 8
#> 10 49 purposeful 9
#> 11 50 slow_walk 5
#> 12 55 slow_walk 10
#> 13 59 slow_walk 11
#> 14 60 medium_walk 5
#> 15 75 medium_walk 12
#> 16 79 medium_walk 13
#> 17 80 brisk_walk 5
#> 18 85 brisk_walk 14
#> 19 89 brisk_walk 15
#> 20 90 fast_walk 5
#> 21 95 fast_walk 16
#> 22 99 fast_walk 17
#> 23 100 very_fast_walk 5
#> 24 105 very_fast_walk 18
#> 25 119 very_fast_walk 19
#> 26 125 all_out 20Created on 2026-01-19 with reprex v2.1.1
Session info
sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#> setting value
#> version R version 4.4.0 (2024-04-24)
#> os macOS 15.4.1
#> system x86_64, darwin20
#> ui X11
#> language (EN)
#> collate en_US.UTF-8
#> ctype en_US.UTF-8
#> tz America/New_York
#> date 2026-01-19
#> pandoc 3.7.0.2 @ /usr/local/bin/ (via rmarkdown)
#>
#> ─ Packages ───────────────────────────────────────────────────────────────────
#> package * version date (UTC) lib source
#> assertthat 0.2.1 2019-03-21 [1] CRAN (R 4.4.0)
#> cadence * 0.2.0 2026-01-19 [1] local
#> cli 3.6.3 2024-06-21 [1] CRAN (R 4.4.0)
#> digest 0.6.37 2024-08-19 [1] CRAN (R 4.4.1)
#> dplyr * 1.1.4 2023-11-17 [1] CRAN (R 4.4.0)
#> evaluate 1.0.3 2025-01-10 [1] CRAN (R 4.4.1)
#> fastmap 1.2.0 2024-05-15 [1] CRAN (R 4.4.0)
#> fs 1.6.5 2024-10-30 [1] CRAN (R 4.4.1)
#> generics 0.1.3 2022-07-05 [1] CRAN (R 4.4.0)
#> glue 1.8.0 2024-09-30 [1] CRAN (R 4.4.1)
#> htmltools 0.5.8.1 2024-04-04 [1] CRAN (R 4.4.0)
#> knitr 1.49 2024-11-08 [1] CRAN (R 4.4.1)
#> lifecycle 1.0.4 2023-11-07 [1] CRAN (R 4.4.0)
#> magrittr 2.0.3 2022-03-30 [1] CRAN (R 4.4.0)
#> pillar 1.10.1 2025-01-07 [1] CRAN (R 4.4.1)
#> pkgconfig 2.0.3 2019-09-22 [1] CRAN (R 4.4.0)
#> R6 2.5.1 2021-08-19 [1] CRAN (R 4.4.0)
#> reprex 2.1.1 2024-07-06 [1] CRAN (R 4.4.0)
#> rlang 1.1.5 2025-01-17 [1] CRAN (R 4.4.1)
#> rmarkdown 2.29 2024-11-04 [1] CRAN (R 4.4.1)
#> rstudioapi 0.17.1 2024-10-22 [1] CRAN (R 4.4.1)
#> sessioninfo 1.2.2 2021-12-06 [1] CRAN (R 4.4.0)
#> tibble 3.2.1 2023-03-20 [1] CRAN (R 4.4.0)
#> tidyselect 1.2.1 2024-03-11 [1] CRAN (R 4.4.0)
#> vctrs 0.6.5.9000 2025-09-08 [1] Github (r-lib/vctrs@1175638)
#> withr 3.0.2 2024-10-28 [1] CRAN (R 4.4.1)
#> xfun 0.50 2025-01-07 [1] CRAN (R 4.4.1)
#> yaml 2.3.10 2024-07-26 [1] CRAN (R 4.4.0)
#>
#> [1] /Library/Frameworks/R.framework/Versions/4.4-x86_64/Resources/library
#>
#> ──────────────────────────────────────────────────────────────────────────────
Hey @ang-zhao - can you provide some clarification on the cadence bands calculation?
I believe we were using https://bjsm.bmj.com/content/52/12/776.abstract to calculate these bands, correct?
Fo
It seems like the cutoffs are different and some are misclassified (e.g. 1 is classified as zero). I believe this may be due to the behavior of
cutwhenright = TRUE(default) incadence/R/cadence_bands.R
Line 45 in a2c914c
Created on 2026-01-19 with reprex v2.1.1
Session info