标题: 请教mod和modz的差异 [打印本页] 作者: shiyiming 时间: 2008-7-17 11:57 标题: 请教mod和modz的差异 我在SAS HELP 上看到MOD和MODZ的介绍，没有看懂，其介绍如下：
Here are some comparisons between the MOD and MODZ functions:
The MOD function performs extra computations, called fuzzing, to return an exact zero when the result would otherwise differ from zero because of numerical error.
The MODZ function performs no fuzzing.
Both the MOD and MODZ functions return a missing value if the remainder cannot be computed to a precision of approximately three digits or more.