Method and apparatus for generating degree of membership in fuzzy inference

A method of generating a degree of membership in a fuzzy inference comprising the steps of:

• reading a first horizontal coordinate and a second horizontal coordinate from a first memory zone, wherein said first horizontal coordinate is larger than said second horizontal coordinate,
• subtracting said second horizontal coordinate from said first horizontal coordinate to obtain a first difference,
• inputting a variable value data as a third horizontal coordinate, said third horizontal coordinate is in between said first and said second horizontal coordinates,
• subtracting said second horizontal coordinate from said third horizontal coordinate to obtain a second difference,
• executing a multiplication function by a shifting method to obtain the result of a full scale value add 1 to said full scale value and multiply by said second difference to obtain a value as a numerator memory area data,
• subtracting said second difference from said numerator zone data to obtain a third difference,
• dividing said third difference by said first difference to obtain a degree of membership of said third horizontal coordinates, and
• determining whether a positive or negative slope;
• when the slope is positive, then maintain the value of the degree of membership;
• when the slope is negative, then subtract the degree of membership of said third horizontal coordinate from said full scale degree of membership.