i solved differential equations in c++ using boost libraries , there i am getting values and graph pattern , but it is not exactly match to my matlab values.Can anyone help me how can i get the exact values.
Odeint is a modern C++ library for numerically solving Ordinary Differential Equations.
www.odeint.com/
ya Odeint C++ library only i used...with integrate method. But graphs are not matching with my matlab values
What method did you use in Matlab? How big is the difference?
ode15s in matlab
Why C++? Can you test with Python?
You learn how to do Differential Equations in Python using the numpy and scipy packages on this website:
http://www.udacity.com/overview/Course/cs222/CourseRev/1
The course is Differential Equations in Action.
For example, you want to solve the following differential equation:
z''(t) = −z(t).
For a second order differential equation, you need to specify z(tini)
and z'(tini)! In the example, lets assume z(0) = 0.0005 and
z'(0) = 0.2.
Your code in python is:
#################################
import numpy as np
from scipy import integrate
import matplotlib.pyplot as plt
def deriv(y,t):
uprime = y[1]
wprime = - y[0]
yprime = np.array([uprime,wprime])
return yprime
start=0
end=10
numsteps=1000
time=np.linspace(start,end,numsteps)
y0=np.array([0.0005,0.2])
y=integrate.odeint(deriv,y0,time)
plt.plot(time,y[:])
plt.show()
##################################
Output is attached.
what is the difference between the data abstraction and abstraction mechanism in c++ ?
09 October 2015 9,835 1 View
I solved differential equations in c++ using euler method. In output i got only few values after that it is giving nan values. Is there any problem in the code or method can't solve those stiff...
07 August 2015 2,324 4 View
Dear all, How to solve differential equations in c++ using Backward Differentiation formula
06 July 2015 9,522 6 View
- The Existence/Uniqueness of Solutions to Higher Order Linear Differential Equations - Higher Order Homogenous Differential Equations - Wronskian Determinants of $n$ Functions - Wronskian...
03 August 2024 2,366 0 View
I have an RNA-seq data that I have analysed using Limma-voom and have extracted the gene IDs, log2FC and the p-values. At p value < 0.05, I have over 10,000 DEGs, however, when I run the GO...
31 July 2024 225 2 View
I am new to Micromechanics and having similar problem with understanding the implementation of the formula's. I would appreciate if anyone can guide me on how to go about getting a scalar value...
30 July 2024 969 0 View
Please, what is the memory consumption of the Matlab function quad tree decomposition procedure [S = qtdecomp(I)] with respect to the input set I?
27 July 2024 5,455 2 View
We assume that we can find a statistical matrix mechanics equivalent to Schrödinger's PDE in two consecutive steps: i-Transform the Schrödinger PDE describing the wave function Ψ into its square...
27 July 2024 3,959 4 View
Hello, I am a research scholar currently working on a project involving image segmentation, and I am interested in using differential evolution for this purpose . I would greatly appreciate it if...
25 July 2024 9,926 1 View
PDE value for Tert-Butylamine
24 July 2024 1,166 0 View
Hello!!! I want to implement the Swerling characteristics functions (CF) directly in MATLAB without using its Fourier integral pairs...the Swerling CFs are actually Laplace Transform of the signal...
23 July 2024 4,925 1 View
I have immunized BalB/C mice with a protein using the intradermal (ID) method with Complete Freund's Adjuvant (CFA) and Incomplete Freund's Adjuvant (IFA), following a 14-day interval and three...
22 July 2024 9,160 2 View
Currently I need to calculate detection probabilities (PD) from radar cross section (RCS) data. Beta distribution parameters for this RCS data are calculated and will be used in Swerling0...
22 July 2024 868 0 View