strex (version 1.2.0)

str_extract_non_numerics: Extract non-numbers from a string.

Description

Extract the non-numeric bits of a string where numbers are optionally defined with decimals, scientific notation and commas (as separators, not as an alternative to the decimal point).

Usage

str_extract_non_numerics(string, decimals = FALSE,
  leading_decimals = decimals, negs = FALSE, sci = FALSE,
  commas = FALSE)

Arguments

string

A string.

decimals

Do you want to include the possibility of decimal numbers (TRUE) or not (FALSE, the default).

leading_decimals

Do you want to allow a leading decimal point to be the start of a number?

negs

Do you want to allow negative numbers? Note that double negatives are not handled here (see the examples).

sci

Make the search aware of scientific notation e.g. 2e3 is the same as 2000.

commas

Allow comma separators in numbers (i.e. interpret 1,100 as a single number (one thousand one hundred) rather than two numbers (one and one hundred)).

Details

• str_first_non_numeric(...) is just str_nth_non_numeric(..., n = 1).

• str_last_non_numeric(...) is just str_nth_non_numeric(..., n = -1).

See Also

Other non-numeric extractors: str_nth_non_numeric

Examples

# NOT RUN {
strings <- c(
  "abc123def456", "abc-0.12def.345", "abc.12e4def34.5e9",
  "abc1,100def1,230.5", "abc1,100e3,215def4e1,000"
)
str_extract_non_numerics(strings)
str_extract_non_numerics(strings, decimals = TRUE, leading_decimals = FALSE)
str_extract_non_numerics(strings, decimals = TRUE)
str_extract_non_numerics(strings, commas = TRUE)
str_extract_non_numerics(strings,
  decimals = TRUE, leading_decimals = TRUE,
  sci = TRUE
)
str_extract_non_numerics(strings,
  decimals = TRUE, leading_decimals = TRUE,
  sci = TRUE, commas = TRUE, negs = TRUE
)
str_extract_non_numerics(c("22", "1.2.3"), decimals = TRUE)
# }

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