COPYSIGN

The COPYSIGN function copies the sign of a number on another one and pushes back the value.

Since 2.6.0, this function can be applied to a LIST of numerical values and a numerical value. Considering this function as F, the result of $a [ $b $c ] F is [ $a $b F $a $c F ] and the result of [ $a $b ] $c F is [ $a $c F $b $c F ].

Since 2.7.1, this function can be applied to a GTS of numerical values. This is very similar to how this function works on LISTs, considering the values of the GTS. In that case the result is a GTS.