Text processing

[Avner Kantor]

Hi all,

Suppose I have: 

myList <- list(a=c("aa", "bb"), b=c("ee", "ffg", "gg", "dd"))

I want to find:

1. Which vector contains "ffg"?

2. Which vector contains string that is substring of "Alaaaaa"?

Thanks,

Avner

[amit gal]

1) sapply(myList, function(x) "ffg" %in% x)

2) sapply(myList,function(t) {a = sum(sapply(t,grepl,x="Alaaa")); a>0})

number 2 is really awkward and I'm sure there is some text/string analysis packages that has some more user friendly functionality (which will probably also solve 1)

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[דוד ארנבורג‎]

@Amit you could slightly improve your answer by 

sapply(myList, function(t) any(sapply(t, grepl, "Alaaa")))

[amit gal]

yes. thanks. forgot about the any() function.

[דוד ארנבורג‎]

Though the best solution (in my opinion) for the second question will be the following (using only one sapply)

sapply(myList, function(x) grepl(paste(x, collapse = "|"), "Alaaa"))

On Thursday, July 24, 2014 2:56:35 PM UTC+3, אבנר קנטור wrote: