You can specify expressions for the *x* and *y*
axes, where each expression is a standard algebraic expression which
can contain parameters of the database, numeric constants, and
commonly used functions. See appendix B for a
list of math functions and operators that can be used in the
expressions. For example, `TE*NE/PB, 2+LOG(PB),` and `1-BETA`
are valid expressions, where TE, NE, PB,
and BETA are names of parameters or expressions defined in
the database. If the value of a parameter in an expression is
NODATA null , then that record will not be plotted. `RETURN` at
the expression prompts will show a list of all parameters. If you use
blanks in an expression, it must be enclosed in double quotes, e.g.,
`"A * B"`. Note: Integer ratios are truncated in
expression evaluation. If you ask for 20/100 to be retrieved the
result is 0; if you ask for 20./100 the result is 0.2. To store
frequently used expressions in the database see
section 4.2.

Fri Jul 11 17:05:56 EDT 1997