Here are a few logos I have used for NYCJUG - the New York City J Users Group - that meets on the 2nd Tuesday of the month downstairs in the Heartland Brewery in the Empire State Building.
NYCJUG logo with texture based on evaluation of a complex polynomial
NYCJUG logo: a J-like shape and the code that generates it
NYCJUG logo with texture based on evaluation of a complex polynomial
NYCJUG logo with a bluejay.
NYCJUG logo with a bluejay.
J-like figure in a red heart, all generated with "plot"; includes code that generates the picture.