`pltf` provides a simple way to use * bc(1)* and

The first argument, *expression*, can be any expression
valid as input to * bc(1)*, with the additional feature that the variable

`x3+3*x2+3*x+1``(x + 1)3``s(sqrt(x2))`

The first two of these are equivalent; note that whitespace and parentheses
are allowed in expressions, although it is necessary to enclose such expressions
in double quotes (e.g., `"(x + 1)*e(x)"`) when entering them as command-line
arguments in order to protect them from the shell. The last expression
is the sine of the square root of x squared; see * bc(1)* for a complete
list of available special functions, or invoke

The second and third arguments specify the domain
of the function (the values over which `x` should vary), and the fourth argument
specifies the `x`-increment (the difference between consecutive values of
`x` for which the expression is to be evaluated).

`pltf` is a shell script that
uses a helper application, `ftable`, to prepare input for `bc -l`. Invoke `ftable`
directly (using the same arguments as for `pltf`) if you need to change the
format of the plot or make a printed version of it. See the source for
`pltf` to see how to do this.

2005-04-26