Say you need to split up a big data structure into homogeneous pieces, apply a function to each piece and then combine all the results back together.
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This post will be one of four in which we go through how to model a multilevel dataset using linear mixed-effects modeling. To begin, we need to collate the data we have gathered in a simple reading experiment but one involving a repeated-measures design warranting a mixed-effects approach. 3,231 more words