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我需要檢測包含特定字符序列的df/tibble的行。R:獲取具有特定字符的數據幀行
seq <- "RT @AventusSystems"
是我的序列
df <- structure(list(text = c("@AventusSystems Wow, what a upgrade from help of investor",
"RT @AventusSystems: A recent article about our investors as shown in Forbes! t.co/n8oGwiEDpu #Aventus #GlobalAdvisors #4thefans #Ti…",
"@AventusSystems Very nice to have this project", "RT @AventusSystems: Join the #TicketRevolution with #Aventus today! #Aventus #TicketRevolution #AventCoin #4thefans t.co/OPlyCFmW4a"
), Tweet_Id = c("898359464444559360", "898359342952439809", "898359326552633345",
"898359268226736128"), created_at = structure(c(17396, 17396,
17396, 17396), class = "Date")), .Names = c("text", "Tweet_Id",
"created_at"), row.names = c(NA, -4L), class = c("tbl_df", "tbl",
"data.frame"))
select(df, contains(seq))
# A tibble: 4 x 0
sapply(df$text, grepl, seq)
回報只有4 FALSE
什麼我錯了嗎?什麼是正確的解決方案? 謝謝你的幫助
請問'grep的(SEQ,DF $文本)'爲你做? – csgroen
或者,如果您想要包含這些字符的數據幀行,請使用「filter(df,grepl(seq,text))' –
@cs groen是的,它的確如此。TY – gabx