

   VVeelloocciittiieess ffoorr 8822 GGaallaaxxiieess

   DDeessccrriippttiioonn::

        A numeric vector of velocities in km/sec of 82 galaxies
        from 6 well-separated conic sections of an `unfilled'
        survey of the Corona Borealis region.  Multimodality in
        such surveys is evidence for voids and superclusters in
        the far universe.

   NNOOTTEE::

        There is an 83rd measurement of 5607 km/sec in the
        Postman et al. paper which is omitted in Roeder (1990)
        and from the dataset here.

   SSoouurrccee::

        Roeder, K. (1990) Density estimation with confidence
        sets exemplified by superclusters and voids in galax-
        ies.  Journal of the American Statistical Association
        85, 617-624.

        Postman, M., Huchra, J. P. and Geller, M. J. (1986)
        Probes of large-scale structures in the Corona Borealis
        region.  Astrophysical Journal 92, 1238-1247.

   EExxaammpplleess::

        gal <- galaxies/1000
        c(width.SJ(gal, method="dpi"), width.SJ(gal))
        plot(x=c(0, 40), y=c(0, 0.3), type="n", bty="l",
             xlab="velocity of galaxy (1000km/s)", ylab="density")
        rug(gal)
        lines(density(gal, width=3.25, n=200), lty=1)
        lines(density(gal, width=2.56, n=200), lty=3)

