numerical

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Limitation of Mathematica optimization module

I have a question regarding Mathematica\'s global optimization capability. I came across this text related to the NAG toolbox (kind of white paper).[详细]

2023-03-19 09:07 分类：问答
Optimization of multivariate function with a initial solution close to the optimum

I was wondering if anyone knows which kind of algorithm could be use in my case. I already have run the optimizer on my multivariate function and found a solution to my problem, assuming that my funct[详细]

2023-03-11 03:09 分类：问答
High order PDEs

I\'m trying to solve a 6th-order nonlinear PDE (1D) with fixed boundary values (extended Fisher-Kolmogorov - EFK).开发者_Go百科After failing with FTCS, next attempt is MoL (either central in space or[详细]

2023-03-10 06:23 分类：问答
Sorting a csv file in Python with sorted() returns values in programmer DESC order, not time DESC order

I\'m not doing anything overly complex I believe. I\'m presorting a large csv data file because it is full of data that arrives in random time order. The index is correct, but the return formatting is[详细]

2023-03-09 08:38 分类：问答
How do you call this kind of assignment : float aFloat = 4.f;

I am trying to figure how do you call this, I thought of \"implicit datatypes\" but it seems this really isn\'t what I imagined.[详细]

2023-03-09 08:21 分类：问答
Plotting a line over several graphs

I don\'t know how this thing is called, or even how to describe it, so the title may be a little bit misleading.[详细]

2023-03-08 12:51 分类：问答
How to obtain the numerical solution of these differential equations with matlab

I have differential equations derived from epidemic spreading. I want to obtain the numerical solutions. Here\'s the equations,[详细]

2023-03-08 00:49 分类：问答
Regex for numeric characters and .&-

I\'m using C# and 开发者_JAVA百科.NET and I have a Regex that looks like this \"\\D\" That matches all non-numeric characters however I don\'t want that to match a decimal point (.) and a negative[详细]

2023-02-28 13:53 分类：问答
Parallelism: Subtly different floating point results?

I\'m trying to debug my parallelism library for the D programming language.A bug report was recently filed that indicates that the low-order bits of some floating point operations that are performed u[详细]

2023-02-26 19:52 分类：问答
How do the Sho dll's from Microsoft Research compare to the open-source Math.NET numerics project

I\'m considering Sho from the perspective of developing general .NET applications and something that has been difficult for me in the past is开发者_Python百科 that there is NO standard math library fo[详细]

2023-02-26 03:23 分类：问答