convertChars: convertChars

In esmprep: Data Preparation During and After the Use of the Experience Sampling Methodology (ESM)

Description

convertChars converts specified single characters within specified ESM variables that contain text.

Usage

convertChars(esDf, charCols, convDf, ignoreCase = FALSE)

Arguments

esDf	a data.frame. A single ESM dataset. It must contain the 2 columns that hold the date-time object for when an ESM questionnaire was started and finished, respectively.
charCols	a vector of character strings. Each character string specifies a column name in the event sampling (raw) dataset which contains text in which specific characters shall be replaced by other characters, e.g. the dashed letter e by e.
convDf	a data.frame. The data frame must contain exactly 2 columns, the first column specifies the characters that shall be replaced, the second column specifies the characters that are going to replace the ones in the first column.
ignoreCase	logical. Enter TRUE if capitalization can be ignored in the course of replacement, else enter FALSE.

Value

esDf Each column which contains text (as specified by the user!) now contains the text with the specific characters being converted (as specified by the user!).

See Also

Exemplary code (fully executable) in the documentation of esmprep (function 16 of 29).

Examples

# o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o
# Prerequisites in order to execute convertChars. Start -------------
# Use example list delivered with the package
RELEVANTVN_ES <- RELEVANTVN_ESext
# isCompleteLs is a list of datasets, also delivered with the package
esMerged <- esMerge(isCompleteLs, RELEVANTVN_ES)
esMerged[,RELEVANTVN_ES[["ES_IMEI"]]] <- as.character(esMerged[,RELEVANTVN_ES[["ES_IMEI"]]])
findTextIdx <- findChars(esMerged)
# Prerequisites in order to execute convertChars. End ---------------
# -------------------------------------------------------
# Run function 16 of 29; see esmprep functions' hierarchy.
# -------------------------------------------------------
# From result of function 'findChars' select the indices of the items
# in the ESM dataset that contain text answers of the participants.
findTextIdx1 <- findTextIdx[c(1,2,9,10)]
# Use findTextIdx1 to generate the 3rd argument of function 'convertChars'.
textColumns <- names(findTextIdx1)
# Generate data.frame specifying the conversion of single characters.
convertCharsDf <- data.frame(c("ä", "ü"), c("ae", "ue"))
# Apply function. esMerged is the result of function 'esMerge'.
esMerged1 <- convertChars(esMerged, textColumns, convertCharsDf)
# # As default upper and lower case are NOT ignored! If you want them
# # ignored, additionally pass TRUE to the argument ignoreCase, like this:
# convertChars(esMerged, textColumns, convertCharsDf, ignoreCase=TRUE)
# o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o=o

esmprep documentation built on July 5, 2019, 5:03 p.m.