5 Dec
2012
5 Dec
'12
6:38 p.m.
2012/12/5 glenpaling slp5591@me.com:
I add these two methods to the math functions protocol of the Collections class:
variance
^(self - self average) squared averageand
standardDeviation
^self variance sqrt.Be careful with large collections integers as these methods will invoke fraction arithmetic which is rather slow. In most cases it would be better to force floating point.
No, IMO the library shouldn't force anything but let the decision to the sender. Such information has a place in documentation.
Nicolas
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