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Piecewise linear function : ウィキペディア英語版 | Piecewise linear function
In mathematics, a piecewise linear function is a function composed of straight-line sections. It is a piecewise-defined function whose pieces are affine functions. If the function is continuous, the graph will be a polygonal curve. ==Examples==
The function defined by: : is piecewise linear with four pieces. (The graph of this function is shown to the right.) Since the graph of a linear function is a line, the graph of a piecewise linear function consists of line segments and rays. Other examples of piecewise linear functions include the absolute value function, the square wave, the sawtooth function, and the floor function.
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