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%I Imaginary unit. % As the basic imaginary unit SQRT(-1), i and j are used to enter % complex numbers. For example, the expressions 3+2i, 3+2*i, 3+2j, % 3+2*j and 3+2*sqrt(-1) all have the same value. % % Since both i and j are functions, they can be overridden and used % as a variable. This permits you to use i or j as an index in FOR % loops, etc. % % See also J. % Copyright 1984-2005 The MathWorks, Inc. % Built-in function.