English name of the absolute error Measurement results and agreed〕 〔measured the difference between the true value. An approximate difference between the number of its absolute accuracy of this approximation is called the absolute error. With a similar number said, a number that it's accurate, then the number of a near absolute error is | aa |.
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No. 3
English name of the absolute error Exact value of x and its approximation as the difference between x * x * Approximate number of the absolute error. In the numerical calculation, denoted by e (x *) = x *- x, denoted by e *. But in general, can not accurately know the e (x *) the size, can be measured or calculated | E (x *)|=| x *- x | ≤ ε (x *) Estimate the upper bound of its absolute value, then ε (x *) x * is called the approximate limit of absolute error, referred to as the error limit, denoted by ε *. For example: If we take π *= 3.14 as an approximation of π = 3.14159 ..., then | e (x *)|=| x *- x | ≤ 0.002, then ε *= 0.002 as an absolute error limit π. With the absolute error limit can know the exact value of the range of π: π = 3.14 ± 0.002. Absolute error of the disadvantages: does not fully express how good or bad approximation, for example: x = 10 ± 1, y = 1000 ± 5, where a precision high? Looks the absolute error limit x absolute error than the limit of small y, it seems that x, high precision, it is not.
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Wikipedia Daquan
Absolute error absolute error ~,,, II L. mouth, circle. Niu e "hospital only; Han coffee. On 'the old .. under the mountain to eat.", A few} See error (error).