In mathematics and computer science, truncation is limiting the number of digitss right of the decimal point.

Truncation and floor function

Truncation of positive real numbers can be done using the floor function, the number of elements to be kept behind the decimal point, the truncated value of x is

is used instead

1. .

Causes of truncation

With computers, truncation can occur when a decimal number is typecast as an integer; it is truncated to zero decimal digits because integers cannot store non-integer real numbers.

In algebra

An analogue of truncation can be applied to polynomials. In this case, the truncation of a polynomial P to degree n can be defined as the sum of all terms of P of degree n or less. Polynomial truncations arise in the study of Taylor polynomials, for example.

See also

• Rounding

• Arithmetic precision

• Quantization (signal processing)

• Precision (computer science)

• Truncation (statistics)

References

External links

• Wall paper applet that visualizes errors due to finite precision

ja:端数処理