R language through package TwitteR is able to extract information from Twitter for Text Mining purposes. In order to get the connection between R console and Twitter work properly, you will need previously to establish a secure connection with Twitter. In this page you will find a full procedure to set this connection.
Getting a developer Twitter account
|after that you should create a new application.
An application is a purpose for your connection, you will provide just a name, description and website address and you will get an access token and an access token secret.
Keep these two codes for later use at R console, when asking four your R access credentials.
Getting a curl Certification
Open your R console and start by loading the following libraries
# Clear the previously used libraries
# Load the required R libraries
Download the curl Cert and save it at your default R folder
Setting the Certification at Twitter
We will prepare the call to function OAuthFactory to get the auth object.
# Set constant requestURL
> requestURL <- "https://api.twitter.com/oauth/request_token"
# Set constant accessURL
> accessURL <- "https://api.twitter.com/oauth/access_token"
> authURL <- "https://api.twitter.com/oauth/authorize"
In consumerKey field paste the access token you got from your twitter developer application.
> consumerKey <- "xxxxxxxxxxxxxxxxxx"
In consumerSecret field paste the access token you got
from your twitter developer application.
> consumerSecret <- "xxxxxxxxxxxxxxxxxx"
Creating the authorization object by calling function OAuthFactory
> twitCred <- OAuthFactory$new(consumerKey=consumerKey,
At this point we are ready to ask for our credentials to Twitter. Let's go for it !
Saving and using the Certification to connect to Twitter
# Asking for access
In your R console you will see the following message instructing you to direct your web browser to the specified URL. There you will get a PIN code which you will have to type in your R console.
To enable the connection, please direct your web browser to:
When complete, record the PIN given to you and provide it here: xxxxxx
Perfect ! Almost done.
Just verify that your new credential is working properly
And save it for future use by downloading a Cred file at your default R folder
> save(list="twitCred", file="twitteR_credentials")
Start searching Twitter
Now its time to use it. To do so, imagine you open your R console from scratch, nothing loaded in memory.
We assume that you have placed at your R default console, files "cacert.perm" and "twitteR_credentials"
> library (twitteR)
Get, for instance, tweets about United Airlines
s <- searchTwitter('#United', cainfo="cacert.pem")
Watch out ! When searching, do not forget using your CA Cert, otherwise you will get the following horrible error message.
 "SSL certificate problem, verify that the CA cert is OK. Details:\nerror:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed"
Error en twInterfaceObj$doAPICall(cmd, params, "GET", ...) :
Error: SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
For even further and up to date info, please refer to R package vignette for TwitteR
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( > º < ) < use it gently !
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