h = contour(s,option) : Plot a 2D/3D object as contour
@iData/contour function to plot a 2D or 3D object
2D objects are shown as a contour
contour(a, option, levels) specifies the number of coutour lines to plot.
input: s: object or array (iData)
option: global option for 2D and 3D plots:
flat, interp, faceted (for shading)
transparent, light, clabel, colorbar, hide_axes
axis tight, axis auto, view2, view3
painters (bitmap drawing), zbuffer (vectorial drawing)
output: h: graphics object handles (cell)
ex: contour(iData(peaks)); contour(iData(flow));
Version: Aug. 22, 2017
See also iData, iData/plot, iData/contour3, iData/contourf