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StateDMI / Command / TableMath

Overview

The TableMath command performs a simple math operation on columns in a table. Although the design of the command could support more advanced cell range addressing schemes, it currently processes complete columns of data. This command and related table commands are not an attempt to replace full-feature spreadsheet programs but are intended to help automate common data processing tasks.

The input is specified by a table column name (Input1) and either a second input column name or a constant value (Input2), with the result being placed in the output column (Output). The ToInteger operator requires only one input value. Output that cannot be computed is set to the NonValue value. Inputs can be any combination of double precision and integer values.

Command Editor

The following dialog is used to edit the command and illustrates the syntax of the command (in this case illustrating how values in a column named ts1 are added to the number .1111. See also the full-size image.

TableMath

TableMath Command Editor

Command Syntax

The command syntax is as follows:

TableMath(Parameter="Value",...)

Command Parameters

Parameter                           Description Default          
TableID The identifier for the table to process. None – must be specified.
Input1 First input column name. None – must be specified.
Operator The operator to be applied as follows:
Input1 Operator Input2 = Output
For example: Input1 * Input2 = Output		 None – must be specified.
Input2 Second input column name, or a constant value to use as input. Required for some operators. Not required for ToInteger.
Output Output column name. If the column is not found it will be added to the table and will contain the results of processing. None – must be specified.
NonValue The value to use in cases where an output result could not be computed (missing input, division by zero). Null will result in blanks in output whereas NaN may be shown in some output products, depending on the specifications for the format. Null

Examples

See the automated tests.

Troubleshooting

See Also