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104 GNU Octave13.10 Organization of Functions Distributed with OctaveMany of Octave’s standard functions are distributed as function files. They are looselyorganized by topic, in subdirectories of ‘octave-home/lib/octave/version/m’, to make iteasier to find them.The following is a list of all the function file subdirectories, and the types of functionsyou will find there.‘audio’‘control’‘elfun’‘general’‘image’‘io’Functions for playing and recording sounds.Functions for design and simulation of automatic control systems.Elementary functions.Miscellaneous matrix manipulations, like flipud, rot90, and triu, as well asother basic functions, like ismatrix, nargchk, etc.Image processing tools. These functions require the X Window System.Input-ouput functions.‘linear-algebra’Functions for linear algebra.‘miscellaneous’Functions that don’t really belong anywhere else.‘plot’A set of functions that implement the Matlab-like plotting functions.‘polynomial’Functions for manipulating polynomials.‘set’‘signal’‘specfun’Functions for creating and manipulating sets of unique values.Functions for signal processing applications.Special functions.‘special-matrix’Functions that create special matrix forms.‘startup’Octave’s system-wide startup file.‘statistics’Statistical functions.‘strings’‘time’Miscellaneous string-handling functions.Functions related to time keeping.