Recent questions tagged numerical

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numerical methods - How to calculate machine epsilon in MATLAB?

I need to find the machine epsilon and I am doing the following: eps = 1; while 1.0 + eps > 1.0 do eps = eps ... eps > 1.0 do What should I do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical methods - C Code Wavelet Transform and Explanation

I am trying to implement a wavelet transform in C and I have never done it before. I have read some about ... and that makes things confusing). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical methods - Python implementation of n-body problem issue

I am currently trying to implement the N-body problem using Euler's method for solving differential equations. ... Venn diagram-esque form. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical methods - Python implementation of n-body problem issue

I am currently trying to implement the N-body problem using Euler's method for solving differential equations. ... Venn diagram-esque form. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical methods - How can I plot the derivative of a graph in gnuplot?

I have a set of measurements of a variable over time. I have these measurements in a file called "results" ... plot that directly in gnuplot? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical integration - Quadruple Integral Using Nested Integral2 in Matlab

I am trying to solve a problem of the following form: f=@(x,y,z,w) x.*y.*z.*w; % A complicated black ... ,'iterated'),a,-a,'ArrayValued',true); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical - Extract contours from ContourPlot in Mathematica

I have a function f(x,y) of two variables, of which I need to know the location of the curves at which it ... hack. Any better way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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284 views

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numerical methods - MATLAB - Fit exponential curve WITHOUT toolbox

I want to fit a decaying exponential to the plotted data. I do NOT have the Curve Fitting or Optimization ... I achieve this in MATLAB? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical partial derivative in MatLab

How can I compute the numerical partial derivative of a probability density function (PDF) in Matlab? I'm not ... or the Symbolic Math toolbox? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical methods - Solving the Lorentz model using Runge Kutta 4th Order in Python without a package

I wish to solve the Lorentz model in Python without the help of a package and my codes seems not to work to my ... .set_zlabel('z') ax.legend() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical - Any way faster than pow() to compute an integer power of 10 in C++?

I know power of 2 can be implemented using << operator. What about power of 10? Like 10^5? Is there any way ... 10^n, where n is an integer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numerical methods - Check if a varchar is a number (TSQL)

is there an easy way to figure out if a varchar is a number? Examples: abc123 --> no number 123 --> yes, its a number Thanks :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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