create.variable.name: Create variable name from string.
Description
This function creates a sensible variable name by replacing
all non-alphanumeric characters with underscores. This is useful
when the string is to be used as a the name of a list element.
Usage
create.variable.name(s)
Arguments
s
The string to be used as a variable name
Value
The string with non-alphanumeric characters replaced by underscores