__ Dataset __

A data set (or dataset) is a collection of data, usually
presented in tabular form. Each column represents a
particular variable. Each row corresponds to a given
member of the data set in question. Its values for each
of the variables, such as height and weight of an object
or values of random numbers. Each value is known as a
datum. The data set may comprise data for one or more
members, corresponding to the number of rows.

source : http://en.wikipedia.org/wiki/Data_set

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