.. _book_fig_chapter6_fig_great_wall:


Great Wall Density
------------------
Figure 6.4

Density estimation for galaxies within the SDSS "Great Wall." The upper-left
panel shows points that are galaxies, projected by their spatial locations
onto the equatorial plane (declination ~ 0 degrees). The remaining panels
show estimates of the density of these points using kernel density estimation
(with a Gaussian kernel with width 5Mpc), a K-nearest-neighbor estimator
(eq. 6.15) optimized for a small-scale structure (with K = 5), and a
K-nearest-neighbor estimator optimized for a large-scale structure
(with K = 40).



.. image:: ../images/chapter6/fig_great_wall_1.png
    :scale: 100
    :align: center


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