round to 4 significant figures

Contents [Hide] 1 the Problem 2 Primer on Financial Issues 3 introducing BigDecimal 4 rounding and Scalin 5 immutability and Arithm Etic 6 Comparison 7 "to" Round:thoughts on Precision 8 Appendix 8.1 API Reference 8.2 ofbiz Framework 8.3 Minilang

Transferred from: http://www.cnblogs.com/lovewife/articles/2466543.htmlSingle precision refers to a 4-byte floating-point number, which is the floatA double is a 8-byte floating-point number, which is doubleDecimal is a high precisionFloating point

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 Translator Note: This article is "High performance Browser Networking" translation version, using Google Translator Tookit tool translation, the original text in many formats lost, follow-up needs to be unified.Please refer to the original text:

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Introduction Linear and logistic regression are often the first modeling algorithms that people learn for machine learning and data science. Both are great because they are easy to use and explain. However, their inherent simplicity has some