umx (version 4.0.0)

umx_grep: Search for text

Description

Search names if given a data.frame, or strings if given a vector of strings.

Usage

umx_grep(
  df,
  grepString,
  output = c("both", "label", "name"),
  ignore.case = TRUE,
  useNames = FALSE
)

Arguments

df

The data.frame() or string to search.

grepString

the search string.

output

the column name, the label, or both (default).

ignore.case

whether to be case sensitive or not (default TRUE = ignore case).

useNames

whether to search the names as well as the labels (for SPSS files with label metadata).

Value

• list of matched column names and/or labels.

Details

The namez function is more flexible. A handy feature of umx_grep is that it can search the labels of data imported from SPSS.

nb: To simply grep for a pattern in a string use R's built-in grep() functions, e.g.: grepl("^NA\\[0-9]", "NA.3")

References

• https://www.github.com/tbates/umx

See Also

• namez(), umx_aggregate(), grep()

Other String Functions: umx_explode_twin_names(), umx_explode(), umx_names(), umx_paste_names(), umx_rot(), umx_str_chars(), umx_str_from_object(), umx_trim(), umx

Examples

# NOT RUN {
umx_grep(mtcars, "hp", output="both", ignore.case= TRUE)
umx_grep(c("hp", "ph"), "hp")
umx_grep(mtcars, "^h.*", output="both", ignore.case= TRUE)
# }
# NOT RUN {
umx_grep(spss_df, "labeltext", output = "label") 
umx_grep(spss_df, "labeltext", output = "name") 
# }