count.tweets: Connect to Mongo database and return count of tweets that...
In SMAPPNYU/smappR: Tools for analysis of Twitter data

Description Usage Arguments Author(s) Examples

count.tweets opens a connection to the Mongo database in the lab computer and will return the number of tweets that match a series of conditions: whether it contains a certain keyword, whether it is or not a retweet, or whether or not it contains a hashtag.

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count.tweets(set, string = NULL, retweets = NULL, hashtags = NULL,
  from = NULL, to = NULL, user_id = NULL, screen_name = NULL,
  verbose = TRUE)

`set`	string, name of the collection of tweets in the Mongo database to query.
`string`	string or vector of strings, set to NULL by default (will return count of all tweets). If it is a string, it will return the number of tweets that contain that string. If it is a vector of string, it will return all tweets that contain at least one of them.
`retweets`	logical, set to NULL by default (will return count of all tweets). If `TRUE`, will count only tweets that are retweets (i.e. contain an embededed retweeted status - manual retweets are not included). If `FALSE`, will count only tweets that are not retweets (manual retweets are now included).
`hashtags`	logical, set to NULL by default (will return count of all tweets). If `TRUE`, will count only tweets that use a hashtag. If `FALSE`, will count only tweets that do not contain a hashtag.
`from`	date, in string format. If different from `NULL`, will consider only tweets after that date. Note that using this field requires that the tweets have a field in ISODate format called `timestamp`. All times are GMT.
`to`	date, in string format. If different from `NULL`, will consider only tweets after that date. Note that using this field requires that the tweets have a field in ISODate format called `timestamp`. All times are GMT.
`user_id`	numeric ID of a user. If different form `NULL`, will count only tweets sent by that Twitter user (if there are any in the collection)
`screen_name`	screen name of a user. If different form `NULL`, will count only tweets sent by that Twitter user (if there are any in the collection)
`verbose`	logical, default is `TRUE`, which generates some output to the R console with information about the count of tweets. If codeFALSE, function will not return any object.

Pablo Barbera pablo.barbera@nyu.edu

## Not run: 
## connect to the Mongo database
 mongo <- mongo.create("SMAPP_HOST:PORT", db="DATABASE")
 mongo.authenticate(mongo, username="USERNAME", password="PASSWORD", db="DATABASE")
 set <- "DATABASE.COLLECTION"

## count all tweets in the database
 count.tweets(set)

## count tweets that mention the word 'turkey'
 count.tweets(set, string="turkey")

## count tweets that mention the words 'turkey' and 'gezi'
 count.tweets(set, string=c("turkey", "gezi"))

## count all retweets in the database
 count.tweets(set, retweets=TRUE)

## count all tweets that mention 'turkey' and are not retweets
 count.tweets(set, string="turkey", retweets=FALSE)

## count all tweets that use a hashtag
 count.tweets(set, hashtags=TRUE)

## count all tweets from January 1st to January 15th
 count.tweets(set, from="2014-01-01 00:00:00", to="2014-01-15 23:59:59")

## End(Not run)