點計Accumulated Error?

See

http://hk.knowledge.yahoo.com/question/question?qid=7007081506830

其實, 如果一個數 x 有error, 另一個數 y 亦有error,
哪 x + y, x-y, xy, x/y 這些數一定有error, 而error係累積(accumulate)出來. 所以叫Accumulated Error.

首先找出有error的數的Maximum and minimum value, 之後計捚有error的數的measured value.

如果
Maximum value - measured value > measured value - minimum value , (Maximum value - measured value)就係Accumulated Error.

如果
Maximum value - measured value < measured value - minimum value, (measured value - minimum value)就係Accumulated Error.