variance

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Calculating variance in prolog

i have made a function in Prolog:- mean(L, M) :- sum(L, S), length(L, N), M is S/N. sum([],0). sum([H|T],Y):-[详细]

2023-02-14 16:56 分类：问答
Rolling variance algorithm

I\'m trying to find an efficient, numerically stable algorithm to calculate a rolling variance (for instance, a variance over a 20-period rolling window). I\'m aware of the Welford algorithm that effi[详细]

2023-02-14 03:53 分类：问答
Read from File Variance Calculation

@Jerry Coffin I get the logic, while(File>>value)//while input just taken from file is true .... do computation.[详细]

2023-02-07 01:47 分类：问答
Covariance and Contravariance on the same type argument

The C# spec states that an argument type cannot be both covariant and contravariant at the same time.[详细]

2023-02-01 17:13 分类：问答
Scala Function Variance and Overriding

I\'m having a little problem understanding variance of methods when overloading. While this perfectly works due to covariance in the return type[详细]

2023-01-27 02:23 分类：问答
My variance function in C# does not return accurate value

The source data : static double[] felix = new double[] { 0.003027523, 0.002012256, -0.001369238, -0.001737660, -0.001647287,[详细]

2023-01-08 20:40 分类：问答
Can I "pimp my library" with an analogue of TraversableLike.map that has nicely variant types?

Suppose I want to add functionality like map to a Scala List, something along the lines of list mapmap f, which applies the function f to each element of list twice. (A more serious example might be i[详细]

2023-01-06 15:12 分类：问答
ref and out parameters in C# and cannot be marked as variant

What does the statement mean? From here ref and out parameters in C# and cannot be marked as variant. 1) Does it mean that the following can not be done.[详细]

2022-12-31 05:51 分类：问答
Detect variance on generic type parameters of interfaces

Is there a way to refl开发者_Python百科ect on an interface to detect variance on its generic type parameters and return types? In other words, can I use reflection to differentiate between the two int[详细]

2022-12-30 19:10 分类：问答
When is @uncheckedVariance needed in Scala, and why is it used in GenericTraversableTemplate?

@uncheckedVariance can be used to bridge the gap between Scala\'s declaration site variance annotations and Java\'s invariant generics.[详细]

2022-12-22 21:41 分类：问答