Identifies the columns indices corresponding to a specific question.

Share:

Description

In many survey systems, subquestions take the form Q1_a, Q1_b, with the main question and subquestion separated by an underscore. This function conveniently returns column index of matches found for a question id in a surveydata object. It does this by using the pattern attribute of the surveydata object.

Usage

1
  which.q(x, Q, ptn = pattern(x))

Arguments

Q

Character string with question number, e.g. "Q2"

x

Object to coerce to surveydata

ptn

A list with two elements, sep and exclude. See pattern and which.q for more detail. By default

See Also

questions to return all questions matching the pattern

Other Question functions: qText, qTextCommon, qTextUnique, questions, splitCommonUnique

Examples

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
# Basic operations on a surveydata object, illustrated with the example dataset membersurvey

class(membersurvey)

questions(membersurvey)

which.q(membersurvey, "Q1")
which.q(membersurvey, "Q3")
which.q(membersurvey, c("Q1", "Q3"))

qText(membersurvey, "Q3")
qTextUnique(membersurvey, "Q3")
qTextCommon(membersurvey, "Q3")

# Extracting columns from a surveydata object

head(membersurvey[, "Q1"])
head(membersurvey["Q1"])
head(membersurvey[, "Q3"])
head(membersurvey[, c("Q1", "Q3")])

# Note that the result is always a surveydata object, even if only one column is extracted

head(membersurvey[, "id"])
str(membersurvey[, "id"])

Want to suggest features or report bugs for rdrr.io? Use the GitHub issue tracker.