numerical-methods

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Finding the smoothest 15% of a curve

What would be the best way to find the smoothest 15% of a curve similar to the one below? I need to know the beginning and ending x coordinates. I have thought about using a derivative function, bu[详细]

2023-03-30 06:32 分类：问答
Matlab Newbie Binary Search Troubleshoot

I am a newbie to Matlab/programming in general. I wish to write a program/script that uses recursive binary search to approximate the root of $2x - 3sin(x)+5=0$, such that the iteration terminates onc[详细]

2023-03-26 14:00 分类：问答
Meaning of relative tolerance in minimization routine (minpack's hybrd1)

I am using a port of minpack\'s hybrd1 in Eigen which uses Powell\'s method to find solution of f(x)=0; the jacobian is computed numerically, in this case.[详细]

2023-03-23 15:37 分类：问答
Numerical pitfalls without extended precision FPUs

Monniaux\'s 开发者_开发技巧excellent article, \"The Pitfalls of Verifying Floating Point Arithmetic\", gives examples of unexpected numerical behavior. However, most of the examples depend on extended[详细]

2023-03-23 12:49 分类：问答
Numeric precision for log(1-exp(x))

I\'m doing some math with really big numbers (I\'m using Python, but this question isn\'t Python specific). For one value, I have a formula that gives me f(t) = Pr(X < t). I want to use this formul[详细]

2023-03-22 17:17 分类：问答
How to set UMFPACK's tolerance

I am using umfpack in c++ to solve a sparse matrix. I am having trouble finding wher开发者_运维问答e the [UMFPACK PIVOT TOLERANCE] parameter is set. Would anybody know how to set this control paramete[详细]

2023-03-16 21:21 分类：问答
how to numerically integrate a variable that is being calculate in the program as a pointer (using e.g. trapezoidal rule) in c language

I have a code, that was not made by me. In this complex code, many rules are being applied to calculate a quantity, d(x). in the code is being used a pointer to calculate it.[详细]

2023-03-15 17:48 分类：问答
Incremental scaling function

If you know that \'input1\' is strictly between 0 and 1 or generally, \'min\' and \'max\' (where min and max are known to be between, but not strictly, 0 and 1), how would you get \'input1\'to increme[详细]

2023-03-12 19:14 分类：问答
Javascript numerical library - vectors, matrices, determinates, inversion

Is there a reasonable numerical library in pure JavaScript? I\'d 开发者_Go百科like array-based vectors, matrices, determinate, and matrix inversion.[详细]

2023-03-12 04:32 分类：问答
How to Solve Linear programming problem using DotNumerics?

I\'m really interested in numerical analysis. I have been using DotNumerics Open Source Application. My linear system is the following:[详细]

2023-03-07 01:11 分类：问答