calculate_custom_score: Calculate the score of sentences
Description
This function loads text and calculates score of each sentence on basis
of presence of words of positive and negative sentiment supplied externally as paramater,
presence of negation,and checking for sarcasm. 0 indicates neutral sentiment. Positive value indicates
positive sentiment. Negative value indicates negative sentiment. 99 indicates
sarcasm.
A flag variable whose value if 1 denotes appending of passed positive and negative words with existing words.By
default, this method will work with supplied positive and negative words only.
# NOT RUN {calculate_custom_score("This is good",c("good"),c("bad"),1)
calculate_custom_score(c("This is good","This is bad"),c("good"),c("bad"),0)
# }