plot3d1 — 3D gray or color level plot of a surface
plot3d1(x,y,z,[theta,alpha,leg,flag,ebox]) plot3d1(xf,yf,zf,[theta,alpha,leg,flag,ebox]) plot3d1(x,y,z,<opts_args>) plot3d1(xf,yf,zf,<opts_args>)
row vectors of sizes n1 and n2 (x-axis and y-axis coordinates). These coordinates must be monotone.
matrix of size (n1,n2). z(i,j) is the value of
the surface at the point (x(i),y(j)).
matrices of size (nf,n). They define the facets used to draw
the surface. There are n facets. Each facet
i is defined by a polygon with nf points.
The x-axis, y-axis and z-axis coordinates of the points of the ith
facet are given respectively by xf(:,i),
yf(:,i) and zf(:,i).
This represents a sequence of statements key1=value1, key2=value2,... where key1,
key2,... can be one of the following: theta, alpha
,leg,flag,ebox (see definition below).
real values giving in degree the spherical coordinates of the observation point.
string defining the labels for each axis with @ as a field separator, for example "X@Y@Z".
a real vector of size three.
flag=[mode,type,box].
an integer (surface color).
the surface is painted with color
"mode" ; the boundary of the facet is drawn
with current line style and color.
a mesh of the surface is drawn.
the surface is painted with color
"-mode" ; the boundary of the facet is not
drawn.
Note that the surface color treatement can be done
using color_mode and
color_flag options through the surface
entity properties (see
surface_properties).
an integer (scaling).
the plot is made using the current 3D scaling (set
by a previous call to param3d,
plot3d, contour or
plot3d1).
rescales automatically 3d boxes with extreme aspect
ratios, the boundaries are specified by the value of the
optional argument ebox.
rescales automatically 3d boxes with extreme aspect ratios, the boundaries are computed using the given data.
3d isometric with box bounds given by optional
ebox, similarily to
type=1.
3d isometric bounds derived from the data, to
similarilytype=2.
3d expanded isometric bounds with box bounds given
by optional ebox, similarily to
type=1.
3d expanded isometric bounds derived from the data,
similarily to type=2.
Note that axes boundaries can be customized through the axes entity properties (see axes_properties).
an integer (frame around the plot).
nothing is drawn around the plot.
unimplemented (like box=0).
only the axes behind the surface are drawn.
a box surrounding the surface is drawn and captions are added.
a box surrounding the surface is drawn, captions and axes are added.
Note that axes aspect can also be customized through the axes entity properties (see axes_properties).
It specifies the boundaries of the plot as the vector
[xmin,xmax,ymin,ymax,zmin,zmax]. This argument is used
together with type in flag : if it is set
to 1, 3 or 5 (see above to
see the corresponding behaviour). If flag is missing,
ebox is not taken into acoount.
Note that, when specified, the ebox argument acts on
the data_bounds field that can also be reset through
the axes entity properties (see axes_properties).
plot3d1 plots a surface with colors depending on the
z-level of the surface. This special plot function can also be enabled
setting color_flag=1 after a plot3d (see
surface_properties)
Enter the command plot3d1() to see a demo.
// simple plot using z=f(x,y)
t=[0:0.3:2*%pi]'; z=sin(t)*cos(t');
plot3d1(t,t,z)
// same plot using facets computed by genfac3d
[xx,yy,zz]=genfac3d(t,t,z);
clf();
plot3d1(xx,yy,zz)
// multiple plots
clf();
plot3d1([xx xx],[yy yy],[zz 4+zz])
// simple plot with viewpoint and captions
clf() ;
plot3d1(1:10,1:20,10*rand(10,20),35,45,"X@Y@Z",[2,2,3])
// same plot without grid
clf()
plot3d1(1:10,1:20,10*rand(10,20),35,45,"X@Y@Z",[-2,2,3])
// plot of a sphere using facets computed by eval3dp
deff("[x,y,z]=sph(alp,tet)",["x=r*cos(alp).*cos(tet)+orig(1)*ones(tet)";..
"y=r*cos(alp).*sin(tet)+orig(2)*ones(tet)";..
"z=r*sin(alp)+orig(3)*ones(tet)"]);
r=1; orig=[0 0 0];
[xx,yy,zz]=eval3dp(sph,linspace(-%pi/2,%pi/2,40),linspace(0,%pi*2,20));
clf()
plot3d(xx,yy,zz)
e=gce();
e.color_flag=1;
scf(2);
plot3d1(xx,yy,zz) // the 2 graphics are similar