Tagged Questions

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258 views

How to improve the solution of a double pendulum system

First, the code: ...
335 views

NDSolve Plotting issue

I am trying to solve a system of ODEs with one extra boundary condition. ...
181 views

plotting an Integration output

How to solve this integral by Mathematica even by numerical methods (plotting the solution) Integrate[(Cos[x] - a)/(1 + a^2 - 2*a*Cos[x])^1.5, {x, 0, 2*Pi}] It ...
332 views

Plot of a function which includes numerical integrals

I want to make a 3D plot of two variable i1 and b1. The dependent variable results from a pay-off function ...
330 views

Problem with plotting a function with NIntegrate

Why does the following Plot3D command never terminate? ...
219 views

DAE - varying initial conditions

I want to solve a DAE-system and I want to vary more than one initial conditions and to manipulate them. I looked here: Putting NDSolve into ParametricPlot But it does not work: ...
962 views

How to speed up the plot of NIntegrate?

Here is a toy example: f[t_] := NIntegrate[Sin[x], {x, 0, t}]; Plot[f[t], {t, 0, 10}] // Timing Even such a simple example will take 2.8 seconds on my computer. ...
269 views

Problems with NDSolve and stiffness

I am trying to solve an ODE in chemical kinetics: \begin{align*} \frac{\mathrm d[x]}{\mathrm dt} &= -k_1 [x][y]\\ \frac{\mathrm d[y]}{\mathrm dt} &= k_1 [x][y] - k_3[y] \end{align*} My ...
461 views

Why Can't Mathematica Integrate this?

I have the following problem from a textbook I am trying to integrate: So, following the directions in text, I am required to integrate each function. However, I cannot get Mathematica to integrate ...
263 views

Table not working with Plot

Because NIntegrate[] does not support parallel computation out of the box, I'm doing a simplified version by breaking the integration limit into pieces and using ...
489 views

Animate the scattering of a Wave Packet

I know mathematica is probably not the best choice for intense numerical integration, but its the only software I know. I would like to create an animation (not real-time, but pre-render the ...