您能否推荐一些简单的 Java 统计数据包?
Could you please suggest any simple Java statistics packages?
我不一定需要任何高级的东西.我很惊讶 java.lang.Math 包中似乎没有计算平均值的函数...
I don't necessarily need any of the advanced stuff. I was quite surprised that there does not appear to be a function to calculate the Mean in the java.lang.Math package...
你们用什么来做这个的?
What are you guys using for this?
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关于:
写一个简单的类有多难计算均值和标准的偏差?
How hard is it to write a simple class that calculates means and standard deviations?
嗯，不难.我只是在手工编码后才问这个问题.但是，当我需要这些最简单的功能时，手头没有这些功能，这只会增加我的 Java 挫败感.我不记得用心计算标准差的公式了:)
Well, not hard. I only asked this question after having hand-coded these. But it only added to my Java frustration not to have these simplest functions available at hand when I needed them. I don't remember the formula for calculating stdev by heart :)
Apache Commons Math，具体来说DescriptiveStatistics 和 SummaryStatistics.
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