R grep Remove Whitespace Rows

In R language, you can use the grep function with regular expressions to filter out lines with whitespace. Here is a simple example:

# 创建一个包含空白行的数据框
df <- data.frame(
  col1 = c("a", "b", "c", "   ", "d"),
  col2 = c(1, 2, 3, 4, 5)
)

# 找出含有空白的行
blank_rows <- grep("\\s", df$col1)

# 删掉含有空白的行
df <- df[-blank_rows, ]

print(df)

In the example above, we utilized grep(“\\s”, df$col1) to identify rows with blank spaces, followed by using df[-blank_rows, ] to delete these rows, and ultimately printing the resulting data frame after filtering.