ln

ln

Natural logarithm (_e)

Result = ln(expression)

expression

spatial, non spatial scalar

Result

dimension of expression scalar

Operation

For each cell, calculates the natural logarithm (_e) logarithm of the cell value on expression and assigns it to the corresponding cell on Result.

Notes

The cell values on expression must be greater than 0. Any cell value outside this range is assigned a missing value on Result. A cell with missing value on expression is assigned a missing value on Result.

Group

This operation belongs to the group of Arithmetic operators

Examples

1. • pcrcalc

   binding

   Result = Result.map;

   Expr = Expr.map;

   initial

   report Result = ln(Expr);

   
   

   • python

   Expr = readmap(“Expr.map”)

   Result = ln(Expr)

   Result.map	Expr.map