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.TH fcontour 2 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
fcontour - level curves
.SH CALLING SEQUENCE
.nf
fcontour(xr,yr,f,nz,[theta,alpha,caption,flag,bbox,zlev])
fcontour2d(x,y,z,nz,[style,strf,leg,rect,nax])
.fi
.SH PARAMETERS
.TP 10
xr,yr
: two real vectors of size respectively (1,n1) and (1,n2).
.TP
f
: is an external which gives the analytic expression of the surface.
\fVz=f(x,y)\fR is first computed on the grid specified by \fVxr.yr\fR. Then, control is
passed to the routine contour.
.TP
nz
: specifies the level values or number.
.RS
.TP
-
If \fVnz\fR is of size 1, its value considered as
an integer gives the number of level curves equally spaced from zmin to zmax.
.TP
-
If \fVnz\fR is a vector, nz(j) gives the value of the jth level curve.
.RE
.TP
[rest]
: for \fVtheta,alpha,caption, bbox\fR see \fVplot3d\fR
.TP
flag
: real vector of size 3 ; \fVflag=[mode,type,box]\fR; \fVflag(2)\fR and \fVflag(3)\fR are
the same as in \fVplot3d\fR; \fVflag(1)\fR has the following meaning :
.RS
.TP 15
flag(1)=0
: the level curves are drawn on the surface defined by (x,y,z)
.TP
flag(1)=1
: the level curves are drawn on a 3D plot and on the plan defined by
equation z=zlev
.TP
flag(1)=2
: The level curves are drawn on a 2D plot.
.RE
.SH DESCRIPTION
Draws the level curves of a surface z=f(x,y). The level curves can be
drawn on a 3D surface or on 2D plot. For level curves on a 2d plot, the function
\fVfcontour2d\fR should be preferred to the function \fVfcontour\fR since
it accepts standard 2d parameters \fV[style,strf,leg,rect,nax]\fR.
\fVfcontour\fR and \fVfcontour2d\fR call respectively \fVcontour\fR
and \fVcontour2d\fR
Enter the command \fVfcontour()\fR or \fVfcontour2d\fR to see a demo.
.SH SEE ALSO
contour, contour2d
.SH AUTHOR
J.Ph.C..
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