This question already has answers here: Reshape three column data frame to matrix ("long" to "wide" format) [duplicate]
Has anyone impl开发者_开发技巧emented the chain ladder method via SQL ? It\'s a method used in actuarial science.Googling \"chain ladder\" SQL returns a white paper which discusses a Transitional Stat
1) long to wide question: I have a dataset开发者_如何学JAVA with 3 columns: person, event, frequency.
I\'ve got a list of transaction dates and the user id of the person who made the transaction on that date (just 1 Tx/da开发者_Go百科y allowed).For example:
I\'ve checked the examples in the Boost website, but they are not what I\'m looking for. To put it simple, I wan开发者_如何学Got to see if a number on a die is favored, using 600 rolls, so the averag
I\'m trying to use boost::normal_distribution in order to generate a normal distribution with mean 0 and sigma 1.
I am interested in getting statistics on the Ehcache I have running. I would like to see the number of hits/misses for a given key over a period of time. Perhaps in the form of a map. For example.
In R, how can I import the contents of a multiline text file (containing SQL) to a single string? The sql.txt file looks like this:
So, I know that is possible to retrieve some info, like Device name, unique ID, etc. all of them provided by UIDevice Class.
I will make a analysis about some information of my company. I thought making a ca to representate the association between two variables. I have 3 variables: Category, Tag, Valoration. My idea is to
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