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'which' command in R with case insensitive


You can index it with grepl by using the ignore.case argument

x <- c("col7", "COL73", "Col17",
"CoL73", "cOl73")
grepl("col73", x, ignore.case=TRUE)
# [1] FALSE  TRUE FALSE  TRUE  TRUE

Similarly, grep returns the numeric index

grep("col73", x, ignore.case=TRUE)
# [1] 2 4 5

For data frame column subsets

df[grepl("col73", names(df),
ignore.case=TRUE)]

Categories : R

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