jeffreybreen / twitter-sentiment-analysis-tutorial-201107 Goto Github PK

I am getting the following error when I run score.sentiment. It appears to be for certain tweets that contain emoticons or non-alpha-numeric characters. Do I need to enter another gsub function to scrub tweets of these things?

Error in tolower(sentence) :
invalid input 'Someone take me to MHK to get chipotle and Starbucks í ¾í´˜í ¼í¿¼í ½í¸�' in 'utf8towcs'

Which classification algorithm it has used? Is it in Support Vector machine algorithm?

Hello, I am getting this error while executing scrape.r . Can you please help why it is happening? "Searching Twitter for airline tweets and saving to disk"
Error in twInterfaceObj$doAPICall(cmd, params, "GET", ...) :
OAuth authentication is required with Twitter's API v1.1