ntiles

Create factor based on roughly equally sized groups

Data sets and utilities from Project MOSAIC (mosaic-web.org) used
    to teach mathematics, statistics, computation and modeling.  Funded by the
    NSF, Project MOSAIC is a community of educators working to tie together
    aspects of quantitative work that students in science, technology,
    engineering and mathematics will need in their professional lives, but
    which are usually taught in isolation, if at all.

ntiles: Create factor based on roughly equally sized groups

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