clear

Format: clear( namespec )

Arguments: [node] namespec Optional list of node names; default = all

Returns: [text] The value of namespec if supplied, otherwise null

Description: Marks all constants specified in namespec as unevaluated and sets their values to null. Use reset to reset all constants without removing their values. If namespec is not provided, all nodes are reset.

Examples: clear("x,y,z") = clears the nodes x, y, and z

clear = clears all nodes

See Also: reset, remove