SCALAR command

Syntax: | `SCALAR s1 { s2 ... }`
Qualifiers: | `\FIT`
Examples: | `SCALAR A SCALAR\FIT A B`

This command defines `s1` to be a scalar. Other variable names, `s2 ...`, may be included, and they will also be defined to be scalars. If `sI` already is a scalar, its value will be unchanged. If `sI` is an existing variable, but not a scalar, it will be destroyed first. If `sI` does not exist, it will be created and initialized to 1.

Fit parameters