#include 

/* is plot in a 3D view */
_is3d(s)
{
        local status = FALSE;

        if (argc < 1)
        {
                if (itemtype == 8)   // XYZ
                {
                        status = TRUE;
                }
                else if ((itemtype == 2 || itemtype == 9) && (getplottype == 4))
                {
                        // make sure not a chartplot in table mode
                        if (getplottype(0) != 6)
                        {
                                // is a list and type is Z surface
                                status = TRUE;
                        }
                }
        }
        else
        {
                if (itemtype(s) == 8)
                {
                        status = TRUE;
                }
                else if ((itemtype(s) == 2 || itemtype == 9) && (getplottype(s) == 4))
                {
                        status = TRUE;
                }
        }
        return(status);
}