This tag should be used for questions related to coding solutions for integrals.
In numerical analysis field, algorithms for integration are a typical example of use for this tag. See also:
Questions tagged [integral]
819 questions
-1
votes
1 answer
Why my integral is not displaying bigger with react-better-mathjax?
I'm using react-better-mathjax and when i display integrals, it is not displaying as it should.
As-to-say bigger....
It displays this :
Instead of that :
Here is the code :
var mj = "\\(V_{\\frac{1}{2}sphere(h)} = \\int_0^R \\pi(R^2 - h^2) dh…
jozinho22
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-1
votes
1 answer
Range bounds of type Integral and/or RealFrac causing problems in nested list comprehensions
I'm trying to understand why for otherwise simple expressions, range bounds specified in Integral types cause ghc to reject a nested comprehension, when changing the range bounds to Num allows the same comprehension to execute successfully. For the…
spillner
- 340
- 1
- 5
-1
votes
1 answer
Scilab - multidimensional integrate
Do you have any idea how to define multidimensional integral? I have to use my own method (Monte-Carlo) to figure out the result.
Integral
Ω - disc where r=0.5 and its center at x=0.5, y=0.5
adgjmptw
- 1
-1
votes
1 answer
Calculate variable value inside integral
I'm trying to calculate the blackbody spectral radiance using planck function:
import numpy as np
import matplotlib.pyplot as plt
from scipy import interpolate, integrate
# Physical constants:
h = 6.6260693e-34
c = 299792485.0 …
c3dr1c
- 1
-1
votes
1 answer
Why definite integral of undefined function returns unevaluated?
Why can Maple yield the result of int(q(t)*diff(q(t),t),t) = (q(t)^2)/2 (indefinite integral) but with int(q(t)*diff(q(t),t),t=0..t) (definite integral) it returns unevaluated?
I expect the result of the definite integral to be (q(t)^2 - q(0)^2)/2.
brunoleos
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- 1
-1
votes
1 answer
Matlab gives no result when I use the integral function
When trying to calculate the Integral of two variables, I got nothing!
Here is the code:
syms x;
a=0.4;
theta=(9 - 4*x*(5*x - 141/25))^(1/2)/2 - 3/2;
theta_prime=-(40*x - 564/25)/(4*(9 - 4*x*(5*x -…
user3311415
- 7
- 2
-1
votes
1 answer
iterate over a list by pre-defined steps
How to iterate over a list with defined steps and not in each item in the list? I want to be able to jump some items.
t = np.linspace(0,100,1000)
Fs = 6000
f = 200
func = 50*np.sin(2 * np.pi * f * t / Fs)+50
idx = [9 140 309 439 609 739 908]
for i…
user10497058
-1
votes
1 answer
Integral calculation with parameters and age dependents
I have a working function of an integral that I would like to expand. I want to consider different parameters dependent on age.
param_1938 for ages >=76
param_1945 for ages 66 to75
param_1955 for ages 61 to 65
The working function that I would…
Orongo
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-1
votes
1 answer
definite 4D integration in octave, with functions as limits
I need to do 4D integration in octave.
My function is f(x,y,phi,theta) and some of the integration limits are function of the outer limits.
0 < theta < pi
t1(x,y) < phi < t2(x,y)
h1 < y < h2
w1 < x < w2
I wrote in octave like this…
Codelearner777
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- 15
-1
votes
1 answer
Definite, improper and multiple integration?
I have a question, whether is it possible in R to implement the Excel "search of the decision function"? It is necessary to create a script in R to solve an integral equation.
To solve 4 integrals below manually I just need paper, a pencil and 10…
psysky
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- 64
-1
votes
2 answers
Direved and integral problème [SCILAB]
I'm working on a project that calculates the derivative of the speed and the integral of the acceleration.
my problem is that I have a lot of acceleration points and speed over time and I can not find the right program for that.
example:…
Skaouz Macac
- 3
- 3
-1
votes
1 answer
Nested call to integral fails
Try this piece of code, which works fine.
a=1;b=2;
% A two-variate function
f2= @(x,y) x+y;
derivedF2=@(x) integral(@(y) f2(x,y), a,b);
% Test the evaluation of the derived function handle
derivedF2(0);
% Test the integration of the derived…
user2008151314
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- 10
-1
votes
1 answer
ValueError when using scipy.integrate.quad
I am receiving a ValueError when integrating using scipy.integrate.quad. Here is my simplified code:
import numpy as np
import scipy.integrate as integrate
p = np.arange(0,1,1/1000)
h = lambda p: p**2/2+p*(1-p)
Kl = lambda p: h(p) + 0.02
K = Kl(p)
R…
splinter
- 3,727
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- 82
-1
votes
1 answer
How to get errors from PID?
Need to add PID controller. Can you help me how to get error, integration error and derivative error from PID? I need this values to generate PID parameters by genetic alghorithm.
J = 0.01;
b = 0.1;
K = 0.01;
R = 1;
L = 0.5;
A = [-b/J K/J
…
Masaj
- 217
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- 14
-1
votes
1 answer
How to perform indefinite integration of this function in MATLAB?
I need to perform the following operations as shown in the image. I need to calculate the value of function H for different inputs(x) using MATLAB.
I am giving the following command from Symbolic Math Toolbox
syms y t…
udit srivastava
- 7
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