## normalisation

<*data processing*> A transformation applied uniformly to
each element in a set of data so that the set has some
specific statistical property. For example, monthly
measurements of the rainfall in London might be normalised by
dividing each one by the total for the year to give a profile
of rainfall throughout the year.

<*programming*> Representation of a floating-point number
so that its mantissa's left-most digit is non-zero. If the
leftmost fraction digit are zeros, the number is said to be
unnormalised. Unnormalised numbers are normalised by shifting
the fraction left, one digit at a time, until the leftmost
digit is nonzero and reducing the exponent by the number of
shifts.

<*database*> database normalisation.

Last updated: 1998-04-15

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**Nearby terms:**

**normalisation**» normalised » normal order reduction » normed space