Chop
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Chop
例題
すべて開くすべて閉じる例 (1)基本的な使用例
スコープ (2)標準的な使用例のスコープの概要
アプリケーション (2)この関数で解くことのできる問題の例
In[1]:=1

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https://wolfram.com/xid/0bueii-b1iaov
Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0bueii-b46h9d
Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0bueii-hzcdlz
Out[3]=3

Equalで比べる前に非常に小さい項を除去する:
In[1]:=1

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https://wolfram.com/xid/0bueii-gqo04k
Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0bueii-eehk0j
Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0bueii-cawgxz
Out[3]=3

特性と関係 (1)この関数の特性および他の関数との関係
Chopの関数的な実装:
In[1]:=1

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https://wolfram.com/xid/0bueii-bwpnx5
In[2]:=2

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https://wolfram.com/xid/0bueii-2hdfv
Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0bueii-n0r1h8
Out[3]=3

In[4]:=4

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https://wolfram.com/xid/0bueii-b2jat9
Out[4]=4

大きい式に関してはChopの方がはるかに速い:
In[5]:=5

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https://wolfram.com/xid/0bueii-9zigz
In[6]:=6

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https://wolfram.com/xid/0bueii-g5evte
In[7]:=7

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https://wolfram.com/xid/0bueii-h121ha
Out[7]=7

In[8]:=8

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https://wolfram.com/xid/0bueii-eed1gq
Out[8]=8

考えられる問題 (1)よく起る問題と予期しない動作
In[1]:=1

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https://wolfram.com/xid/0bueii-bwunp6
Out[1]=1

このため,Chopは機械精度複素数の実部を厳密な0にはしない:
In[2]:=2

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https://wolfram.com/xid/0bueii-fcjz21
Out[2]=2

In[3]:=3

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https://wolfram.com/xid/0bueii-n9z1ev
Out[3]=3

Wolfram Research (1988), Chop, Wolfram言語関数, https://reference.wolfram.com/language/ref/Chop.html.
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Wolfram Research (1988), Chop, Wolfram言語関数, https://reference.wolfram.com/language/ref/Chop.html.
テキスト
Wolfram Research (1988), Chop, Wolfram言語関数, https://reference.wolfram.com/language/ref/Chop.html.
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Wolfram Research (1988), Chop, Wolfram言語関数, https://reference.wolfram.com/language/ref/Chop.html.
CMS
Wolfram Language. 1988. "Chop." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Chop.html.
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Wolfram Language. 1988. "Chop." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Chop.html.
APA
Wolfram Language. (1988). Chop. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Chop.html
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Wolfram Language. (1988). Chop. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Chop.html
BibTeX
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@misc{reference.wolfram_2025_chop, author="Wolfram Research", title="{Chop}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/Chop.html}", note=[Accessed: 07-April-2025
]}
BibLaTeX
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@online{reference.wolfram_2025_chop, organization={Wolfram Research}, title={Chop}, year={1988}, url={https://reference.wolfram.com/language/ref/Chop.html}, note=[Accessed: 07-April-2025
]}