Well, there's a big difference between a slightly positive emotion (caused by... a joke your friend makes), or a very positive emotion (caused by seeing the northern light).
I think I'm going with the second one I suggested. And I'll probably end up making it manually. Writing down the 7x7=49 possible combinations and counting how many of the 50 emotions were a specific combo.
Edit: I did it manually. And then I used the data to Paint a graph draft:
By the way, I have Powerpoint here, so no worries there.