Round rounds to the closest representable number. In the
case of a tie, it rounds:
Positive numbers to the closest representable number in the direction of positive infinity.
Negative numbers to the closest representable number in the direction of negative infinity.
As a result:
A small negative bias is introduced for negative samples.
No bias is introduced for samples with evenly distributed positive and negative values.
A small positive bias is introduced for positive samples.
In the MATLAB® software, you can perform this type of rounding using the
round function. The rounding mode
Round is shown in the following figure.