Common vocabulary between pages

[Davidsch]

@DonaldFisk, concerning your excellent work 'A Principal Component Analysis..' some Q:

1.
If you plotted against vectors that represent all words, and their repeated count, why did You are not allowed to view links. Register or Login to view. cause problems, with these 3 words and did you leave it out?

2. 
I never did this comparison like figure 2, between the Currier types, and would be very interested in knowing the words from the top quandrants, that are entirely in green, and entirely red.  Because, I suspect that there is only a slight inner difference in these individual words.

3. "We can now see that each section is a cluster in its own right, but without gaps between them". figure 3.
Why do you think that is, or what does it suggest? 

To explain myself: I am not looking for differences pur sang, but I am looking for similarities in the deviating words.

4. Are those graphs from Python, imported tables from CSV?
I would like something similar on other texts, perhaps you could help me there

NB: you have a great sense of humor linking to "series of tubes", haha