Read file or text string using a regular expression to separate fields.
Read file or text string using a regular expression to separate fields.
read.pattern(file, pattern, perl = FALSE, text, sep = "\01", fileEncoding = "", ...)
file |
See |
pattern |
A regular expression. |
perl |
logical. If |
text |
See |
sep |
This should be a character that does not appear in any field. It is used for holding an intermediate form of the text. |
fileEncoding |
See |
... |
Further arguments passed to |
The parenthesized portions of the regular expression are extracted as fields.
A data.frame.
See strapplyc, read.table.
# 3 space-separated fields. The first field may have embedded spaces. Lines <- "this is the first field 1 2 more text 3 4 " pat <- "^(.*) +(\\S+) +(\\S+)$" read.pattern(text = Lines, pattern = pat, as.is = TRUE) # 3 space-separated fields. The last field may have embedded spaces. Lines2 <- "1 2 this is the first field 3 4 more text " pat2 <- "^(\\S+) +(\\S+) +(.*)$" read.pattern(text = Lines2, pattern = pat2, as.is = TRUE)
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