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Understanding the Language

Defining a Matrix

The fundamental data object on which all Interactive Matrix Language commands operate is a two-dimensional (row × column) numeric or character matrix. By their very nature, matrices are useful for representing data and efficient for working with data. Matrices have the following properties:

The dimension of a matrix is defined by the number of rows and columns it has. An m ×n matrix has mn elements arranged in m rows and n columns. The following nomenclature is standard in this book:

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