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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Discretization error ： ウィキペディア英語版 Discretization error In numerical analysis, computational physics, and simulation, discretization error (or ''truncation error'') is the error inherent in discretization. It results from the fact that a function of a continuous variable is represented in the computer by a finite number of evaluations, for example, on a lattice. Discretization error can usually be reduced by using a more finely spaced lattice, with an increased computational cost. Whenever continuous data is discretized, there is always some amount of discretization error. The goal is to reduce the amount to a level considered negligible for the modeling purposes at hand. ==Examples== Discretization error is the principal source of error in methods of finite differences and the pseudo-spectral method of computational physics. When we define the derivative of $\backslash ,\backslash !f(x)$ as $f\text{'}(x)\; =\; \backslash lim\_\}$ or $f\text{'}(x)\backslash approx\backslash frac$, where $\backslash ,\backslash !h$ is a finitely small number, the difference between the first formula and this approximation is known as discretization error. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Discretization error」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.