在 R 中按段落拆分

Question

我正在尝试在 R 中按段落拆分文档

test.text <- c("First paragraph.  Second sentence of 1st paragraph.

           Second paragraph.")
# When we run the below, we see separation of \n\n between the 2nd and 3rd sentences
test.text

# This outputs the desired 2 blank lines in the console
writeLines("\n\n")

a <- strsplit(test.text, "\\n\\n")

它没有正确拆分。

Answer 1

strsplit的输出是一个list 。 此外， \\n\\n之后还有空格。 因此，我们需要注意这一点，并使用[[或通过unlist将其转换为vector

a <- strsplit(test.text, "\n+\\s+")[[1]]
a
#[1] "First paragraph.  Second sentence of 1st paragraph." "Second paragraph."