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
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votes
1 answer
How to plot integrals in MATLAB?
I'm trying to plot the following integral:
I only know how to get the answer but I can't figure out how to plot it.
Mary
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1 answer
Basic Integrand Process in R
I've been trying to wrap my head around this problem but I am unfortunately quite new to both integrals and R. Can anyone help me figure out what I might be doing wrong here? The problem is as follows:
Question 3
Here's my code so far:
## Question…
Nick Blaze
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2 answers
C++: How to compute an integral with interval bounds?
I am both tired, new to C++ and real bad at dealing with polynomials. That's a bad combo for my assignment. Nevertheless I am trying to solve it. Please note that I might have misunderstood certain parts both mathematically and language-wise. Maybe…
Treeline
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votes
1 answer
Function defined as an integral: trapz?
I want to calculate a function p of x,y: p(x,y) which is defined by the integral of another function of x and y:
p(x,y) = Integral(indefinite) of v(x,y) dx
Now, if I have a matrix expressing p on a uniform grid x and y, how do I construct the…
usumdelphini
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2 answers
Matlab partial area under the curve
I want to plot the area above and below a particular value in x axis.
The problem i am facing is with discrete values. The code below for instance has an explicit X=10 so i have written it in such a way that i can find the index and calculate the…
Bharath S
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votes
1 answer
Scipy integral comes out wrong
I'm trying to integrate a function. The function is guaranteed to be non negative:
def function(x):
something = ...
something_else = ...
return exp(something) / sqrt(something_else)
Now I'm integrating it:
def integrand(a, b):
…
zmbq
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votes
1 answer
Trapez Method in Java
I found a formula in the Internet for calculating the trapezoid method , it works as it should, but I do not see why should I performed the following lines in the trapez method:
sum = 0.5 * bef + (h * sum);
i= i+ 2
The first iteration performed by…
Coconut
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votes
1 answer
Calculate implicit integral function contours with python
I guess I am missing something in this code:
integrand = lambda t,x,y: (1/(Tiempo-t))*np.exp(-((x-U*(Tiempo-t))**2+y**2)/(4*a*(Tiempo-t)))
def z_func(x,y,Rate,Conductivity):
integral, err = integrate.quad(integrand,0,Tiempo,args=(x,y,))
…
Margaral
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votes
1 answer
integral error (first input argument must be function handle.)
I want to use an integral over a vector but I will see an error for sys_eff which is " First input argument is not function handle."
I will be glad to have your guide and thanks in advance.
I should mention that all vectors have the same ize as…
Hamed
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votes
1 answer
Mathematica Integrate gives back the integrand
i'm trying to Integrate the following function:
(q (1 + q) - E^-q Sinh[q])/(-q + Cosh[q] Sinh[q]) - (
2 q Tanh[q])/(-q + Cosh[q] Sinh[q])
I already solved it numerically but i really need the indefinite integral so used:
In[67]:= Integrate[(
…
SSC Napoli
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votes
2 answers
Integral 0 to pi/2 using montecarlo in R
Trying to find integral (o to pi/2) of x^2 cosx using montecarlo method. This is my first time so need some direction. To generate random number should I transform the limit of the integral to (0,1) or can I generate random numbers with the…
greenH0rn
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votes
1 answer
integration example with matlab
Can someonse show me how to calculate the following in matlab:
where
g = 9.91
As = 1000
z = 10
zv = 30
zD = 10
pz = 999
Az = 500
KatyB
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votes
1 answer
how to calculate integral with R
Here, I would like to have your helps on implementing calculation of integral on two vector. I checked pages on integral calculation relative to R. But, I have few training on mathematics, so I still can not do that by myself.
My objectives is to…
jianfeng.mao
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Basic example of how to do numerical integration in C++
I think most people know how to do numerical derivation in computer programming, (as limit --> 0; read: "as the limit approaches zero").
//example code for derivation of position over time to obtain velocity
float currPosition, prevPosition,…
RhinoPak
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votes
1 answer
Integral Coefficients
I am reviewing a proof at the moment and there is terminology that I do not understand. What does it mean for a polynomial to have "integral coefficients"?
Jessica Garcia
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