tplquad:类型错误:“浮动”对象不可调用

问题描述 投票:0回答:1

我正在尝试运行此代码,但我在标题中收到错误。我查找了有关 tplquad 的文档和示例,但我无法理解我的问题。提前非常感谢!

这是我的代码:

from numpy import *
from pylab import *

import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
from math import *
from scipy.integrate import quad,dblquad,tplquad
from scipy.integrate import nquad

fig_width = 6.
fig_height = fig_width*0.75
fig_size =  [fig_width,fig_height]
params = {'backend': 'TkAgg',
          'axes.labelsize': 30,
          'text.fontsize': 20,
          'title.fontsize': 20,
          'legend.fontsize': 20,
          'xtick.labelsize': 20,
          'ytick.labelsize': 20,
          'text.usetex': False,
          'font.family': 'sans-serif',
          'figure.figsize': fig_size}
rcParams.update(params)

pi=3.14
pt_T=3.
#T=0.47
thetaP= -pi
precision=5
y=0


M_T=linspace(1.,7.,precision)
integral1d=[0]*precision


#chi now is def with a plus instead of the minus in the article
def chi(thetap1,p1,thetaP,T,M_T):
    return abs((2*p1*T*sqrt(pt_T**2+(M_T**2+pt_T**2)*sinh(y)**2)*sin(thetaP)*sin(thetap1))**2 - (2*p1*T*(sqrt(M_T**2+pt_T**2)*cosh(y)- sqrt(pt_T**2+(M_T**2+pt_T**2)*sinh(y)**2)*cos(thetaP) *cos(thetap1) )-(T**2)* M_T**2)**2)+1

def p1max(thetaP, thetap1,T,M_T):
    return (M_T**2)*T/(2*(sqrt(M_T**2+pt_T**2)*cosh(y)- sqrt(pt_T**2+(M_T**2+pt_T**2))*sinh(y)**2*cos(thetaP-thetap1)))-0.1

def p1min(thetaP, thetap1,T,M_T):
    #NOT SURE ABOUT THE T AT DENOMINATOR
    return (M_T**2)*T/(2*(sqrt(M_T**2+pt_T**2)*cosh(y)- sqrt(pt_T**2+(M_T**2+pt_T**2))*sinh(y)**2*cos(thetaP+thetap1))) +0.1

def integral(thetaP,T,M_T): 
    area =dblquad(lambda p1, thetap1: 5*(1/(18*pi**5))*sin(thetap1)*(p1/(sqrt(chi(thetap1,p1,thetaP,T,M_T))))*(1/(exp(p1/T) + 1))*(1/(exp((sqrt(M_T**2 + pt_T**2)*cosh(y) - p1/T) +1))) , -pi+0.1, -0.1, lambda p1: p1min(thetaP, p1,T,M_T), lambda p1: p1max(thetaP,p1,T,M_T))  #CHANGE   1., lambda p1:10.)
    return area[0]

def integrand(M_T, p1,thetap1,T):
    return pt_T*T*2*pi*5*(1/(18*pi**5))*sin(thetap1)*(p1/(sqrt(chi(thetap1,p1,thetaP,T,M_T))))*(1/(exp(p1/T) + 1))*(1/(exp((sqrt(M_T**2 + pt_T**2)*cosh(y) - p1/T) +1)))


def formula151(M_T):
    area =tplquad(lambda  p1, thetap1,T:  pt_T*T*2*pi*5*(1/(18*pi**5))*sin(thetap1)*(p1/(sqrt(chi(thetap1,p1,thetaP,T,M_T))))*(1/(exp(p1/T) + 1))*(1/(exp((sqrt(M_T**2 + pt_T**2)*cosh(y) - p1/T) +1))) ,0.333, 20./3,lambda thetap1: -pi+0.1, -0.1, lambda thetap1, p1: p1min(thetaP, p1,T,M_T),lambda thetap1,p1: p1max(thetaP,p1,T,M_T) ) 
    return area[0]


#solving the integral
for ind in range(0, precision):
    integral1d[ind]=formula151( M_T[ind])
    print integral1d[ind]



plot(M_T,integral1d)
xlabel('M/T')
ylabel('prod rate')
title('thetaP =-3.12')
plt.yscale('log')
#plt.xscale('log')
show()

错误来自第 57 行,其中使用了 tplquad,完整的回溯是

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/usr/lib/python2.7/dist-packages/IPython/utils/py3compat.pyc in execfile(fname, *where)
    202             else:
    203                 filename = fname
--> 204             __builtin__.execfile(filename, *where)

/home/chiara/Scrivania/formula15a.py in <module>()
     61 #solving the integral
     62 for ind in range(0, precision):
---> 63         integral1d[ind]=formula151( M_T[ind])
     64         print integral1d[ind]
     65 

/home/chiara/Scrivania/formula15a.py in formula151(M_T)
     55 
     56 def formula151(M_T):
---> 57         area =tplquad(lambda  p1, thetap1,T:  pt_T*T*2*pi*5*(1/(18*pi**5))*sin(thetap1)*(p1/(sqrt(chi(thetap1,p1,thetaP,T,M_T))))*(1/(exp(p1/T) + 1))*(1/(exp((sqrt(M_T**2 + pt_T**2)*cosh(y) - p1/T) +1))) ,0.333, 20./3,lambda thetap1: -pi+0.1, -0.1, lambda thetap1, p1: p1min(thetaP, p1,T,M_T),lambda thetap1,p1: p1max(thetaP,p1,T,M_T) )
     58         return area[0]
     59 

/usr/lib/python2.7/dist-packages/scipy/integrate/quadpack.pyc in tplquad(func, a, b, gfun, hfun, qfun, rfun, args, epsabs, epsrel)
    498 
    499     """
--> 500     return dblquad(_infunc2,a,b,gfun,hfun,(func,qfun,rfun,args),epsabs=epsabs,epsrel=epsrel)
    501 
    502 

/usr/lib/python2.7/dist-packages/scipy/integrate/quadpack.pyc in dblquad(func, a, b, gfun, hfun, args, epsabs, epsrel)
    433 
    434     """
--> 435     return quad(_infunc,a,b,(func,gfun,hfun,args),epsabs=epsabs,epsrel=epsrel)
    436 
    437 

/usr/lib/python2.7/dist-packages/scipy/integrate/quadpack.pyc in quad(func, a, b, args, full_output, epsabs, epsrel, limit, points, weight, wvar, wopts, maxp1, limlst)
    252         args = (args,)
    253     if (weight is None):
--> 254         retval = _quad(func,a,b,args,full_output,epsabs,epsrel,limit,points)
    255     else:
    256         retval = _quad_weight(func,a,b,args,full_output,epsabs,epsrel,limlst,limit,maxp1,weight,wvar,wopts)

/usr/lib/python2.7/dist-packages/scipy/integrate/quadpack.pyc in _quad(func, a, b, args, full_output, epsabs, epsrel, limit, points)
    317     if points is None:
    318         if infbounds == 0:
--> 319             return _quadpack._qagse(func,a,b,args,full_output,epsabs,epsrel,limit)
    320         else:
    321             return _quadpack._qagie(func,bound,infbounds,args,full_output,epsabs,epsrel,limit)

/usr/lib/python2.7/dist-packages/scipy/integrate/quadpack.pyc in _infunc(x, func, gfun, hfun, more_args)
    379 def _infunc(x,func,gfun,hfun,more_args):
    380     a = gfun(x)
--> 381     b = hfun(x)
    382     myargs = (x,) + more_args
    383     return quad(func,a,b,args=myargs)[0]

TypeError: 'float' object is not callable

注意:函数“积分”和“被积函数”已定义但最终没有使用......我只是把它们留在那里

python scipy numerical-integration
1个回答
1
投票

scipy.integrate
docs 中,
tplquad
的签名(计算三重积分的数值近似)是:

scipy.integrate.tplquad(func, a, b, gfun, hfun, qfun, rfun, args=(), epsabs=1.49e-08, epsrel=1.49e-08)

其中

func
是要积分的三个变量的函数,
a
b
是外部积分的浮点极限,
gfun
hfun
是给出中间极限的一个变量的函数积分,
qfun
rfun
是两个变量的函数,给出了最内层积分的极限。

我很难弄清楚发生了什么,直到我重新格式化你的代码以使其更具可读性。这是您对

tplquad
的调用,已重新格式化以使行长度更短:

area = tplquad(
    lambda p1, thetap1, T: (
        pt_T*T*2*pi*5*(1/(18*pi**5))*sin(thetap1)*
        (p1/(sqrt(chi(thetap1,p1,thetaP,T,M_T))))*
        (1/(exp(p1/T) + 1))*
        (1/(exp((sqrt(M_T**2 + pt_T**2)*cosh(y) - p1/T) + 1)))
    ),
    0.333,  # a
    20./3,  # b
    lambda thetap1: -pi + 0.1,  # gfun
    -0.1,                       # hfun
    lambda thetap1, p1: p1min(thetaP, p1, T, M_T),  # qfun
    lambda thetap1, p1: p1max(thetaP, p1, T, M_T),  # rfun
)

(正如 @user2357112 所建议的,将这些

lambda
表达式从调用中取出并将它们定义为单独的函数也有助于提高可读性。特别是,如果您为被积函数定义一个单独的函数,您将能够执行一块一块地计算,不需要把一个巨大的表达式放在一行上。)

重新格式化后,更容易看出问题所在:在对

tplquad
的调用中,您传递了
-0.1
的常量
hfun
。这是行不通的:在数学中,人们可以(ab)使用常量值来表示常量函数,但编程语言(以及一些数学家)往往会更加挑剔:你将需要这里有一个实际的函数。将
-0.1
替换为
lambda thetap1: -0.1

顺便说一句,我也对你这里的可变订单有点怀疑。文档页面说,虽然被积函数的输入顺序应该是

(z, y, x)
,但
gfun
hfun
应该是
x
的函数,并且
qfun
rfun
应该是
(x, y)
的函数(以该顺序)。这似乎与你所拥有的不符。

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