Graphics Programs Reference
In-Depth Information
min(data(:,3))
ans =
-25
max(data(:,3))
ans =
20
we choose
v = -30 : 5 : 25;
The command
[c,h] = contour(XI,YI,ZI,v)
returns contour matrix
c
and a handle
h
that can be used as input to the func-
tion
clabel
, which labels contours automatically.
clabel(c,h)
Alternatively, the graph is labeled manually by selecting
manual
option in
the function
clabel
. This function places labels onto locations that have
been selected with the mouse. Labeling is terminated by pressing the
re-
turn
key.
[c,h] = contour(XI,YI,ZI,v);
clabel(c,h,'manual')
Filled contours are an alternative to the empty contours used above. This
function is used together with
colorbar
displaying a legend for the graph.
In addition, we plot the locations and
z
values of the control points (black
empty circles, text labels) (Fig. 7.6).
contourf(XI,YI,ZI,v), colorbar
hold on
plot(data(:,1),data(:,2),'ko')
text(data(:,1)+1,data(:,2),labels);
hold off
A pseudocolor plot is generated by using the function
pcolor
. Black con-
tours are also added at the same levels as in the above example.
pcolor(XI,YI,ZI), shading flat
hold on
contour(XI,YI,ZI,v,'k')
hold off
