c++ n grams - map_to_string: returns a single string of the map<string,long>, wh

Question

c++ n grams

- map_to_string: returns a single string of the map<string,long>, where each element is printed as string:long, comma separated elements. No comma at the end

•vector_to_string: returns a single string of the argument vector<pair<string,long>>,where each element is printed as string:long, comma

separated elements. No comma at the end! This vector is convenient for sorting, (can't sort a map)

•clean_string: for the provided string argument returns a new string where the only contents are alphabetic characters in lower case of the argument string

•generate_ngrams: for the provided argument string, generates all the n grams of a given nfor that string. Returns a vector<string>

of all the ngrams found (no counting at this point, just avector of ngrams, could have repeats.

input 1:           ( ouput 1: thisisatest)

1

This is a test!!!

input 2:           (output2: hel, ell, llo, low, owo, wor, orl, rld, )

input 3:               ( output3: a:3, b:2, c:1)

3

input 4:                  (output4:hin:2, his:1, ing:1, int:1, ist:1, nth:1, sth:1, thi:3)

Explanation / Answer

You say you want a character vector with that output, but others who find this question may be looking for one of these functions instead:

First, a way to get output ready for input to R; that would be dput:

Second, a way to output a csv file, which would be write.csv or write.table. These functions take a parameter file, not used here, to directly output to a file.

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