Quad is a scipy package which is used for 1D integration in Python
Questions tagged [quad]
135 questions
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Can't integrate with dblquad
So I want to integrate a double integral with constants in it, like a, b, etc where the user can asign the value of this constants:
The limits of the integral are x[0,1] and y[-1,2]
import numpy as np
import scipy.integrate as integrate
def…
Álvaro Romero Mato
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triple integration over arrays python
I have the following triple integral:
the integral
the data are: t 1D array(size 124) , pr 1D array(size 10), lat 1D array(241) and lon 1D array(size 480)
V 4D array (124, 10, 241, 480)
I want to integrate v over t, pr and lon at each lat So, I…
Mag
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Bessel function using scipy.quad integration not working
I'm trying to plot a Bessel function in 2D using the scipy.quad integration method.
My problem: the plot only has a tiny dot in the middle because my lowest value is far too low.
Here is my code:
import numpy as np
import scipy.integrate as…
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1 answer
error in plotting a function, including integrate.quad
I want to plot a function which has integrate.quad in it. The function has true float value in the interval.
import matplotlib.pyplot as plt
import numpy as np
import scipy.integrate as integrate
def S(M):
s = integrate.quad(lambda k:…
Smtl
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1 answer
How to propagate error when using scipy quad on a spline of data with measurement error?
I have a data set with N points which I fit a spline to and integrate using scipy.integrate.quad. I would like to use the N associated measurement errors to put an error estimate on the final integral value.
I originally tried to use the…
handroski
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Conversion of symbolic expression to numeric one for use in quad - use lambdify?
I want to convert an expression containing symbolic variables to a numeric one so that the expression may be subsequently used in an integration method 'quad'.
import numpy
import math as m
import scipy
import sympy
#define constants …
CAF
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Numerical integration method 'quad' derivative error
I have defined a series of functions below with the end function fA being inserted for a numerical integration. The integration is with respect with one variable so the other arguments are passed as numeric so that the integration method (quad) may…
CAF
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"TypeError" message while performing quad integration method of scipy.integrate with mpmath functions
I am trying to calculate two integrals using scipy.integrate.quad. However, since gamma functions with negative first parameter are not defined in scipy, I had to choose the version from mpmath. After running the following code,
from scipy.integrate…
Rebel
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IndexError: tuple index out of range, error when trying to integrate the fucntion
I am trying to calculate a value of function f_integ, which is a result of integration of function f from 0 to x_v.
f = lambda x : x + 1
def f_integ(x_array):
int_result = np.zeros_like(x_array)
indexes =…
ani87
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Minimizing a function using python for data fitting
I have a function as the following
q = 1 / sqrt( ((1+z)**2 * (1+0.01*o_m*z) - z*(2+z)*(1-o_m)) )
h = 5 * log10( (1+z)*q ) + 43.1601
I have experimental answers of above equation and once I must to put some data into above function and solve…
Ethan
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How do you invert scipy quad function to pass in an arc length and receive a value for (t)?
If I were to run something like the code below where I pass in the minor and major arc of an ellipse as 3.05 and 2.23 with the 50 degree angle formed by the arc, how would I be able to take the output of 2.531432761012828 as the arc length and pass…
Fairly Factual
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Nonlinear magnetic model fit -with a definite integral- using scipy.integrate.quad and lmfit
I would like to fit an hysteresis curve, with a superparamagnetic behavior, using a magnetic model which includes a Langevin function and a pair distribution function [1]. To fit with this equation I must solve a definite integral. I was trying to…
Ernesto
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python scientific programming why blank occur when plotting with right results?
I want to plot the integration results as described below , but it seems turned out to be a blank sheet, what' s the reason ? please help me!
# -*- coding: utf-8 -*-
import matplotlib.pylab as plt
import numpy as np
import scipy as sp
from…
John Paul Qiang Chen
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Python: Evaluating Integral for array
import numpy
import matplotlib.pyplot as plt
from scipy import integrate
def f(x,y):
return x*y + x**2
def integral(x,y):
I = integrate.quad(f, 0, x, args=(y,))[0]
return I
def gau(x,y):
return (1+x)*integral(x,y)
xlist =…
user7248647
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Scipy quad integrate with cdf as differential
I'm quite stuck at the moment with a little function I write. I want to embed the following function into my program:
where is the convolution of of the cumulative distribution function of a poisson distribution.
If I got it right, I'd calculate…
FriendlyGuy
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