sjmisc (version 2.7.7)

frq: Frequency table of labelled variables

Description

This function returns a frequency table of labelled vectors, as data frame.

Usage

frq(x, ..., sort.frq = c("none", "asc", "desc"), weights = NULL,
  auto.grp = NULL, show.strings = TRUE, show.na = TRUE,
  grp.strings = NULL, out = c("txt", "viewer", "browser"),
  title = NULL, encoding = "UTF-8", file = NULL)

Arguments

x

A vector or a data frame. May also be a grouped data frame (see 'Note' and 'Examples').

...

Optional, unquoted names of variables that should be selected for further processing. Required, if x is a data frame (and no vector) and only selected variables from x should be processed. You may also use functions like : or tidyselect's select_helpers. See 'Examples' or package-vignette.

sort.frq

Determines whether categories should be sorted according to their frequencies or not. Default is "none", so categories are not sorted by frequency. Use "asc" or "desc" for sorting categories ascending or descending order.

weights

Bare name, or name as string, of a variable in x that indicates the vector of weights, which will be applied to weight all observations. Default is NULL, so no weights are used.

auto.grp

Numeric value, indicating the minimum amount of unique values in a variable, at which automatic grouping into smaller units is done (see group_var). Default value for auto.group is NULL, i.e. auto-grouping is off.

show.strings

Logical, if TRUE, frequency tables for character vectors will not be printed. This is useful when printing frequency tables of all variables from a data frame, and due to computational reasons character vectors should not be printed.

show.na

Logical, or "auto". If TRUE, the output always contains informatin on missing values, even if variables have no missing values. If FALSE, information on missing values are removed from the output. If show.na = "auto", information on missing values is only shown when variables actually have missing values, else it's not shown.

grp.strings

Numeric, if not NULL, groups string values in character vectors, based on their similarity. The similarity is estimated with the stringdist-package. See group_str for details on grouping, and that function's maxdist-argument to get more details on the distance of strings to be treated as equal.

out

Character vector, indicating whether the results should be printed to console (out = "txt") or as HTML-table in the viewer-pane (out = "viewer") or browser (out = "browser").

title

String, will be used as alternative title to the variable label. If x is a grouped data frame, title must be a vector of same length as groups.

encoding

Character vector, indicating the charset encoding used for variable and value labels. Default is "UTF-8". Only used when out is not "txt".

file

Destination file, if the output should be saved as file. Only used when out is not "txt".

Value

A list of data frames with values, value labels, frequencies, raw, valid and cumulative percentages of x.

See Also

flat_table for labelled (proportional) tables.

Examples

# NOT RUN {
# simple vector
data(efc)
frq(efc$e42dep)

# with grouped data frames, in a pipe
library(dplyr)
efc %>%
  group_by(e16sex, c172code) %>%
  frq(e16sex, c172code, e42dep)

# with select-helpers: all variables from the COPE-Index
# (which all have a "cop" in their name)
frq(efc, contains("cop"))

# all variables from column "c161sex" to column "c175empl"
frq(efc, c161sex:c175empl)

# for non-labelled data, variable name is printed,
# and "label" column is removed from output
data(iris)
frq(iris, Species)

# group variables with large range and with weights
efc$weights <- abs(rnorm(n = nrow(efc), mean = 1, sd = .5))
frq(efc, c160age, auto.grp = 5, weights = weights)

# different weight options
frq(efc, c172code, weights = weights)
frq(efc, c172code, weights = "weights")
frq(efc, c172code, weights = efc$weights)
frq(efc$c172code, weights = efc$weights)

# group string values
dummy <- efc[1:50, 3, drop = FALSE]
dummy$words <- sample(
  c("Hello", "Helo", "Hole", "Apple", "Ape",
    "New", "Old", "System", "Systemic"),
  size = nrow(dummy),
  replace = TRUE
)

frq(dummy)
frq(dummy, grp.strings = 2)

# }