 
 
 
19.2.1  2D graph
The plotfunc or
funcplot
command draws the graph of a function.
plotfunc can draw the graph of a one-variable function or a
two-variable function; this section will discuss one-variable
functions and the next section will discuss two-variable functions.
- 
plotfunc takes one mandatory argument and two
optional arguments:
- 
expr, an expression defining a function.
- Optionally, var, the variable name (by default
x) possibly with bounds. If the variable is given as
var=a..b, the graph will be drawn from a to b,
otherwise it will be graphed over the default interval
(see Section 2.5.8).
- Optionally, opt, which can be
xstep=n to specify the discretization
step or nstep=n to specify the number of points used to
graph.
 
- plotfunc(expr,var ⟨,opt ⟩)
draws the graph.
Examples
| plotfunc(x^2-2,x,xstep=5) | 
| plotfunc(x^2-2,x=-2..3,nstep=30) | 
 
 
