Re: How is the degree of membership calculated?

John Kim (
Fri, 1 May 1998 11:25:00 +0200 (MET DST)

I have a much simpler formular

If you look at the paper "Neuro-Fuzzy Modeling and Control" by
Roger Janag, published in Proceeding of IEEE Vol. 83, No. 3, 1995

you can simply formulate as following

triangle(x; a, b, c) =
max( min((x-a)/(b-a), (c-x)/(c-b)), 0)

proving with usual max() and min() function.

where a, b, c is the 3 points of the triangle.

e.g) triangle(64; 60, 65, 70) = 0.8

you can also formulate for trapezoid and others.


        		I get knocked down
			But I get up again
	You're never going to keep me down

- song from CHUMBAWAMBA

Kim, Il-Joong ( Intelligent System Control Research Center Korea Institue of Science & Technology

TEL. +82-2-958-5748 PAG. +82-015-8321-6656 URL.