FindColNames.R: Return column names of dataframe with matched strings

In freyasquires/noxpro: Processing functions for raw AQD NOx data output.

Description

Function to find column names in a dataframe that contain a given substring. If no column headings are given then return all columns in dataframe.

Usage

FindColNames(df, col.match = "all", preserve.case = TRUE)

Arguments

df	Dataframe to be interrogated
col_match	Vector of strings or substrings (single character string is also ok) to be searched for in dataframe column headings. Default is "all" in which case all column headings are returned.
preserve_case	Boolean. If TRUE (default) then match case, if FALSE then ignore string case when matching.

Value

Vector of column headings that match the col_match substrings. If no matches are found then returns empty vector

freyasquires/noxpro documentation built on May 23, 2019, 7:33 a.m.