plotfunc takes two main arguments: an expression of two
variables or a list of several expressions of two variables and the list of
these two variables, where each variable may be replaced by
an equality variable=interval to specify the range for this variable
(if not specified, default values are taken from the graph configuration).
plotfunc accepts two optional arguments to specify
the discretization step in x and in y by
xstep=... and ystep=....
Alternatively one can specify the number of points used for the
representation of the function with nstep=
(instead of xstep
and
ystep).
plotfunc draws the surface(s) defined by z= the first argument.
Input:
^
2+y^
2,[x,y])Output:
^
2+y^
2Input:
Output:
Input:
Output:
Input:
Output:
Now an example where we specify the x and y discretization step
with xstep
and ystep
.
Input:
Output:
Alternatively we may specify
the number of points used for the representation of the
function with nstep
instead of xstep
and ystep
.
Input:
Output:
Remarks