Reverse items based on item table or a fallback_max
formr_reverse.RdExample: If your data contains Extraversion_1, Extraversion_2R and Extraversion_3, there will be two new variables in the result: Extraversion_2 (reversed to align with _1 and _2) and Extraversion, the mean score of the three. If you supply an item table, the maximum possible answer to the item will be used to reverse it. If you don't, the maximum actually given answer or the fallback_max argument will be used to reverse it. It's faster to do this without an item table, but this can lead to problems, if you mis-specify the fallback max or the highest possible value does not occur in the data.
Examples
if (FALSE) { # \dontrun{
formr_connect(email = 'you@example.net', password = 'zebrafinch' )
icar_items = formr_items(survey_name='ICAR',host = 'http://localhost:8888/formr/')
# get some simulated data and aggregate it
sim_results = formr_simulate_from_items(icar_items)
reversed_items = formr_reverse(item_list = icar_items, results = sim_results)
} # }
results = jsonlite::fromJSON(txt =
system.file('extdata/gods_example_results.json', package = 'formr', mustWork = TRUE))
items = formr_items(path =
system.file('extdata/gods_example_items.json', package = 'formr', mustWork = TRUE))
formr_reverse(results, items)
#> Warning: religiousness_2R is not of type labelled and cannot be reversed
#> session created modified ended
#> 1 1 2016-02-29 10:47:54 2016-02-29 10:48:06 2016-02-29 10:48:06
#> 2 2 2016-02-29 10:48:08 2016-02-29 10:48:11 2016-02-29 10:48:11
#> 3 3 2016-02-29 10:48:13 2016-02-29 10:48:16 2016-02-29 10:48:16
#> 4 4 2016-02-29 10:48:18 2016-02-29 10:48:24 2016-02-29 10:48:24
#> 5 5 2016-02-29 10:48:26 2016-02-29 10:48:36 2016-02-29 10:48:36
#> 6 6 2016-02-29 10:48:38 2016-02-29 10:48:44 2016-02-29 10:48:44
#> 7 7 2016-02-29 10:48:45 2016-02-29 10:48:54 2016-02-29 10:48:54
#> 8 8 2016-02-29 10:48:57 2016-02-29 10:49:03 2016-02-29 10:49:03
#> 9 8 2016-02-29 10:49:05 2016-02-29 10:49:11 2016-02-29 10:49:11
#> 10 9 2016-02-29 10:49:13 2016-02-29 10:49:18 2016-02-29 10:49:18
#> 11 10 2016-02-29 10:49:20 2016-02-29 10:49:27 2016-02-29 10:49:27
#> 12 11 2016-02-29 10:49:29 2016-02-29 10:49:35 2016-02-29 10:49:35
#> 13 12 2016-02-29 10:49:37 2016-02-29 10:49:44 2016-02-29 10:49:44
#> 14 13 2016-02-29 10:49:45 2016-02-29 10:49:52 2016-02-29 10:49:52
#> gods religiousness_1 religiousness_2R religiousness_3
#> 1 cthulhu 4 3 2
#> 2 glob 1 5 1
#> 3 glob 1 5 1
#> 4 spaghetti_monster 3 4 3
#> 5 cthulhu 4 3 2
#> 6 glob 2 3 4
#> 7 cthulhu 1 2 3
#> 8 glob 2 5 2
#> 9 cthulhu 2 4 2
#> 10 spaghetti_monster 3 3 3
#> 11 glob 1 5 1
#> 12 cthulhu 2 1 2
#> 13 spaghetti_monster 3 2 3
#> 14 cthulhu 3 1 3
#> religiousness_4 prefer_1 prefer_2
#> 1 3 4 4
#> 2 1 1 1
#> 3 1 1 1
#> 4 2 4 4
#> 5 1 5 1
#> 6 3 4 3
#> 7 4 1 2
#> 8 1 3 2
#> 9 2 3 3
#> 10 3 4 4
#> 11 2 1 2
#> 12 1 2 1
#> 13 4 5 4
#> 14 4 4 5