Available with Spatial Analyst license.
Calculates the natural logarithm (base e) of cells in a raster.
The input can be of integer or float type.
You can review some results for floating-point input values in the examples of output values from the Logarithmic tools.
Input values that are 0 or negative will be NoData in the output raster.
The output raster from this tool is always floating-point type, regardless of the input value type.
If the input is a multiband raster, the output will be a multiband raster. The tool will perform the operation on each band in the input.
The natural logarithm (Ln) is the most commonly used logarithmic function.
If the input is multidimensional raster data, all slices from all variables will be processed. The output will be a multidimensional raster in CRF format.
| Label | Explanation | Data Type |
Input raster or constant value | Input values for which to find the natural logarithm (Ln). To use a number as an input for this parameter, the cell size and extent must first be set in the environment. | Raster Layer; Constant |
| Label | Explanation | Data Type | Output raster | The output raster. The cell values are the base e (natural) logarithm of the input values. | Raster |
Ln(in_raster_or_constant)
| Name | Explanation | Data Type |
in_raster_or_constant | Input values for which to find the natural logarithm (Ln). To use a number as an input for this parameter, the cell size and extent must first be set in the environment. | Raster Layer; Constant |
| Name | Explanation | Data Type | out_raster | The output raster. The cell values are the base e (natural) logarithm of the input values. | Raster |