define summing-up - EAS
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r - How to sum a variable by group - Stack Overflow
https://stackoverflow.com/questions/1660124/how-to-@AndrewMcKinlay, R uses the tilde to define symbolic formulae, for statistics and other functions. It can be interpreted as "model Frequency by Category" or "Frequency depending on Category".Not all languages use a special operator to define …
Conclusion Definition & Meaning - Dictionary.com
https://www.dictionary.com/browse/conclusionConclusion definition, the end or close; final part. See more.