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
    _images/ln_Result.png _images/ln_Expr.png

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