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Questions tagged [pde]

Use this tag for questions about partial differential equations. For questions about the Eclipse Plugin Development Environment, use eclipse-pde instead.

Partial Differential Equations are differential equations that contain unknown multivariable functions and their partial derivatives. See [http://en.wikipedia.org/wiki/Partial_differential_equation][1]

The Eclipse Plug-in Development Environment (PDE) provides tools to create, develop, test, debug, build and deploy Eclipse plug-ins, fragments, features, update sites and RCP products. PDE also provides comprehensive OSGi tooling. See [http://www.eclipse.org/pde/][2]

Questions about the Eclipse Plug-in Development Environment are better tagged as 'eclipse-pde'.

See

Partial_differential_equation

Eclipse Plug-in Development Environment

477 questions
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Why is FFT of (A+B) different from FFT(A) + FFT(B)?

I have been fighting with a very weird bug for almost a month. Asking you guys is my last hope. I wrote a program in C that integrates the 2d Cahn–Hilliard equation using the Implicit Euler (IE) scheme in Fourier (or reciprocal) space: Where the…
Tropilio
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What's 'API Baseline' in Eclipse PDT

Since upgrading to Eclipse 3.7, the Eclipse PDE plugin wants me to specify an 'API Baseline' for all my Eclipse Plugin projects. However there seems to be no documentation which actually explains what 'API Baseline' stands for here, and what is it…
pdeva
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Solving PDE with implicit euler in python - incorrect output

I will try and explain exactly what's going on and my issue. This is a bit mathy and SO doesn't support latex, so sadly I had to resort to images. I hope that's okay. I don't know why it's inverted, sorry about that. At any rate, this is a linear…
Oria Gruber
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How to extrapolate a raster using in R

I am trying to downscale climatic conditions using the methodology in this article using the R software. I am almost there, but I am missing a couple of steps Packages and data needed For this example I uploaded some data to the archive.org website…
Derek Corcoran
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9
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2 answers

Numerical instability FFTW <> Matlab

I am trying to numerically solve the Swift-Hohenberg equation http://en.wikipedia.org/wiki/Swift%E2%80%93Hohenberg_equation using a pseudo-spectral scheme, where the linear terms are treated implicitly in Fourier space, while the nonlinearity is…
wurstl
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9
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how to get workspace path in eclipse?

I am doing to study about PDE(Eclipse Plugin Project). I need to get workspace path. My text widget(swt) should to be set current workspace path. How to get workspace path in eclipse?
user3639147
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Is the PDE's "Update Site Wizard" still the right way to create an update site?

The point of this question is to get verification from someone knowledgeable of the current state of affairs with the Eclipse install system. I have an Eclipse plugin and I want to make an update site for it using the easiest (but correct) method…
BHS
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Where are saved files in Google Colab located?

I'm trying to access a VTK file where the solution to the heat equation is saved, but I've no idea where it's saved in Colab. from fenics import * import time T = 2.0 # final time num_steps = 50 # number of time steps dt = T /…
Mo Houshmand
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Eclipse PDE: What is a "target platform"?

When you work with Eclipse PDE (Plug-in development environment), there is the term "target platform." What does that mean exactly?
Aaron Digulla
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Finite difference method for 3D diffusion/heat equation

I'm trying to use finite differences to solve the diffusion equation in 3D. I think I'm having problems with the main loop. In particular the discrete equation is: With Neumann boundary conditions (in just one face as an example): Now the…
TinyKender
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3 answers

Target Platform for PDE Headless build does not work

I am currently trying to get my headless pde-build working but I am stuck on a point where I do not know how to continue. The problem is how to define the related target platform to compile the plugins against. I have a build.bat with the following…
Andreas
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Iterating a Finite Difference Scheme in a 2-D Array with 3 Boundary Conditions

In an intermediary step to completing my undergraduate thesis, I'm attempting to solve the Black-Scholes PDE in R by an explicit finite difference scheme. As of now, I keep getting hung up on simultaneously iterating backwards in time (along the…
dunno
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Problem while solving a minimal 1D Poisson-Nernst-Planck equation

I am trying to solve the Poisson-Nernst-Planck equation in Python with the library FiPy. It is basically a set of equations that describes - in my example - the separation of two ion concentrations in a solution with a potential gradient. Like…
Nadav
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Using automatic differentiation libraries to compute partial derivatives of an arbitrary tensor

(Note: this is not a question about back-propagation.) I am trying so solve on a GPU a non-linear PDE using PyTorch tensors in place of Numpy arrays. I want to calculate the partial derivatives of an arbitrary tensor, akin to the action of the…
BenjaminDSmith
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Solving a system of partial differential equations (PDE's) in R

I need to solve the following system of PDE's that contains diffusion terms in R: I use the R package ReacTran to solve the above system. This is my R code: library(ReacTran) library(deSolve) library(rgl) # Parameters r <- 1 epsilon <- 1 delta <-…
m.taheri
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