SpatialPointSelect
[试用]
SpatialPointSelect[spdata,crit]
根据 crit 选择 SpatialPointData spdata 的子集.
更多信息

- SpatialPointSelect 通常用于从 SpatialPointData 选取一部分数据,从而获得较小的 SpatialPointData.
- 从概念上讲,SpatialPointSelect 相当于对 {{point1,ann1},{point2,ann2},…} 形式的点和注释应用以获取一个子集.
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- 标准函数 crit 通常是一个布尔表达式,含有对点和注释的条件,如 (Norm[#Point]<1&& #species"Birch")&,其中,species 是注释键之一.
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- 可在 crit 中使用以下参数:
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#Point 关于点的条件 #key 针对与注释 "key" 关联的值的条件
范例
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范围 (7)标准用法实例范围调查
根据点的条件 (5)
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根据注释 (2)
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选择其“颜色”注释值接近 Red 的点:
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应用 (1)用该函数可以解决的问题范例
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SpatialPointSelect 保留了原始观测区域:
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Wolfram Research (2020),SpatialPointSelect,Wolfram 语言函数,https://reference.wolfram.com/language/ref/SpatialPointSelect.html.
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Wolfram Research (2020),SpatialPointSelect,Wolfram 语言函数,https://reference.wolfram.com/language/ref/SpatialPointSelect.html.
文本
Wolfram Research (2020),SpatialPointSelect,Wolfram 语言函数,https://reference.wolfram.com/language/ref/SpatialPointSelect.html.
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Wolfram Research (2020),SpatialPointSelect,Wolfram 语言函数,https://reference.wolfram.com/language/ref/SpatialPointSelect.html.
CMS
Wolfram 语言. 2020. "SpatialPointSelect." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/SpatialPointSelect.html.
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Wolfram 语言. 2020. "SpatialPointSelect." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/SpatialPointSelect.html.
APA
Wolfram 语言. (2020). SpatialPointSelect. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/SpatialPointSelect.html 年
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Wolfram 语言. (2020). SpatialPointSelect. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/SpatialPointSelect.html 年
BibTeX
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@misc{reference.wolfram_2025_spatialpointselect, author="Wolfram Research", title="{SpatialPointSelect}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/SpatialPointSelect.html}", note=[Accessed: 04-April-2025
]}
BibLaTeX
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@online{reference.wolfram_2025_spatialpointselect, organization={Wolfram Research}, title={SpatialPointSelect}, year={2020}, url={https://reference.wolfram.com/language/ref/SpatialPointSelect.html}, note=[Accessed: 04-April-2025
]}