contour2dicompute level curves of a surface on a 2D plotCalling Sequence[xc, yc] = contour2di(x, y, z, nz)Argumentsx, y
two real row vectors of size n1 and n2: the grid.
z
a real matrix of size (n1,n2), the
values of the function.
nz
the level values or the number of levels.
If nz is an integer
its value gives the number of
level curves equally spaced from zmin to zmax as follows:
Note that the zmin and
zmax levels are not drawn
(generically they are reduced to points) but
they can be added with
If nz is a vector
nz(i) gives the value of
the i-th level curve.
xc, yc
vectors of identical sizes containing the contours definitions. See below for details.
Descriptioncontour2di computes level curves of a surface
z = f(x, y) on a 2D plot. The values of
f(x,y) are given by the matrix z
at the grid points defined by x and y.
xc(1) contains the level associated with first
contour path, yc(1) contains the number
N1 of points defining this contour path and
(xc(1+(1:N1)), yc(1+(1:N1)) )
contain the coordinates of the paths points. The second path begin
at xc(2+N1) and yc(2+N1) and
so on.
ExamplesSee Also
contour
contour2d
plot2d