I have a basic doubt in construction of co-occurence matrix from text. Coocurence matrix X is defined as :
Xij : number of times word i occurs in context of word j in a window of size w.
Now is this context limited to sentence i.e do we context word of a main word in a sentence only or across the whole document?
Consider the corpus :
human interface computer survey user computer system response time eps user interface system system human system eps user response time trees graph trees graph minors trees graph minors survey I like graph and stuff I like trees and stuff Sometimes I build a graph Sometimes I build trees
Now for word graph and context window 10 do we look for only 4th last line or do we search for words across line also considering whole doc as one line?