rounding error - definizione. Che cos'è rounding error
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Cosa (chi) è rounding error - definizione

DIFFERENCE BETWEEN THE RESULT PRODUCED BY AN ALGORITHM WHEN USING EXACT ARITHMETIC AND WHEN USING FINITE-PRECISION, ROUNDED ARITHMETIC
Rounding error; Roundoff error; Round-off; Round off; Rounding errors; Round-off errors

Round-off error         
A roundoff error, also called rounding error, is the difference between the result produced by a given algorithm using exact arithmetic and the result produced by the same algorithm using finite-precision, rounded arithmetic. Rounding errors are due to inexactness in the representation of real numbers and the arithmetic operations done with them.
round off         
If you round off an activity with something, you end the activity by doing something that provides a clear or satisfactory conclusion to it.
The Italian way is to round off a meal with an ice-cream...
This rounded the afternoon off perfectly...
He rounds off by proposing a toast to the attendants.
PHRASAL VERB: V P n (not pron), V n P, V P by -ing
Rounding         
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REPLACING NUMERICAL VALUE BY ANOTHER APPROXIMATELY EQUAL
Rounding functions; Banker's rounding; Round to even; Nearest integer function; Stochastic rounding; Statistician's rounding; Rounding function; Rounding numbers; Bankers' rounding; Directed rounding; Unbiased rounding; ASTM rounding; Bankers rounding; Table-maker's dilemma; Rounding to integer; Nearest integer; Dutch rounding; Gaussian rounding; Sticky rounding; Sticky round; Round to odd; Rounding to odd; Rounding-to-odd; Round-to-odd; Sticky-round; Double rounding; Round half to even; Rounded number
·adj Round or nearly round; becoming round; roundish.
II. Rounding ·p.pr. & ·vb.n. of Round.
III. Rounding ·noun Small rope, or strands of rope, or spun yarn, wound round a rope to keep it from chafing;
- called also service.
IV. Rounding ·noun Modifying a speech sound by contraction of the lip opening; labializing; labialization. ·see Guide to Pronunciation, / 11.

Wikipedia

Round-off error

In computing, a roundoff error, also called rounding error, is the difference between the result produced by a given algorithm using exact arithmetic and the result produced by the same algorithm using finite-precision, rounded arithmetic. Rounding errors are due to inexactness in the representation of real numbers and the arithmetic operations done with them. This is a form of quantization error. When using approximation equations or algorithms, especially when using finitely many digits to represent real numbers (which in theory have infinitely many digits), one of the goals of numerical analysis is to estimate computation errors. Computation errors, also called numerical errors, include both truncation errors and roundoff errors.

When a sequence of calculations with an input involving any roundoff error are made, errors may accumulate, sometimes dominating the calculation. In ill-conditioned problems, significant error may accumulate.

In short, there are two major facets of roundoff errors involved in numerical calculations:

  1. The ability of computers to represent both magnitude and precision of numbers is inherently limited.
  2. Certain numerical manipulations are highly sensitive to roundoff errors. This can result from both mathematical considerations as well as from the way in which computers perform arithmetic operations.
Esempi dal corpus di testo per rounding error
1. Even if this proves right,difficulties in measuring CPI render such "inflation" little more than a rounding error.
2. Article continues Our contribution may be little more than a rounding error in economic terms, but it is not so minor politically.
3. Japanese farmers produced 2.2 million tons of rice last year but exported only about 1,000 tons, which on the books of the world‘s leading rice exporters would be less than a rounding error.
4. That $33 billion may be tantamount to a rounding error in a $2.6 trillion budget, but it is 10 percent of the $333 billion budget deficit the White House has forecast for the fiscal year that ends Sept. 30.
5. But proponents of continuing deflationary dangers point to the tendency of the CPI to overestimate actual price rises and to the flimsiness of a number such as 0.1 per cent, more a rounding error than a reliable data point.