fcontour(2)

NAME
fcontour - level curves

CALLING SEQUENCE
fcontour(xr,yr,f,nz,[theta,alpha,caption,flag,bbox,zlev])

PARAMETERS

xr,yr
    : two real vectors of size respectively (1,n1) and (1,n2).

f   : is an external which gives the analytic expression of the surface. z=f(x,y) is first computed on the grid specified by xr.yr. Then, control is passed to the routine contour.

nz  : specifies the level values or number.

    -   If nz is of size 1, its value considered as an integer gives the number of level curves equally spaced from zmin to zmax.

    -   If nz is a vector, nz(j) gives the value of the jth level curve.

[rest]
    : for theta,alpha,caption, bbox see plot3d

flag
    : real vector of size 3 ; flag=[mode,type,box]; flag(2) and flag(3) are the same as in plot3d; flag(1) has the following meaning :

    flag(1)=0
        : the level curves are drawn on the surface defined by (x,y,z)

    flag(1)=1
        : the level curves are drawn on a 3D plot and on the plan defined by equation z=zlev

    flag(1)=2
        : The level curves are drawn on a 2D plot.

DESCRIPTION
Draws the level curves of a surface z=f(x,y)

EXAMPLE
enter the command fcontour() to see a demo

AUTHOR
J.Ph.C..