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non-metric distance
释义
non-metric distance
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理学
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释
non-metric distance
非度量距离
给定数据集,对于任意的对象和,如果它们之间的度量满足下面4个条件:①非负性:对于任意两个对象和,有;②自反性:当,有;③对称性:对于任意两个对象和,有;④三角不等式:对于任意三个对象,和,有:。则称为度量距离(metric distance),不满足以上部分条件的被统称为非度量距离(non-metric distance)。
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