我刚接触Python,所以请您耐心等待。我正在使用Python中的odeint函数解决模型问题,但是我遇到了一个错误:The size of the array returned by func (1) does not match the size of y0 (2)。也许我在odeint函数中返回args时犯了错误,但我看过一个相关的odeint帖子LINK,并且它与返回参数一起正常工作。我不知道问题出在哪里,或者可能我正在错误地获取错误。如果我错了,请纠正我。
from scipy import *
from scipy.integrate import odeint
from operator import itemgetter
import matplotlib
matplotlib.use('Agg')
from matplotlib.ticker import FormatStrFormatter
from pylab import *
import sys
ExpData = [1.0 , 1.1660520579009868 , 1.3688685188071037 , 1.6165891026469563 ,
1.9191557810726714 ]
t_range = arange(0.0,20.0,0.1)
y0 = [1,0.5]
VarList = ["a","b"]
ParaList = ["k1","k2"]
k1 = 1
k2 = 2
def func(Y,t,modelID,t1,t2):
return GenModel(Y,modelID,t1,t2)
def GenModel(Y,modelID,t1,t2):
RetY = [None]
if modelID == 1:
RetY = Y[0] + Y[1]
elif modelID == 2:
RetY = t1*Y[0] + Y[1]
elif modelID == 3:
RetY = Y[0] + t1*Y[1]
# code reduced from here
if Y[0] == 0 or Y[1] == 0:
if modelID == 27:
RetY = 0
elif modelID == 28:
RetY = 0
if Y[0] != 0 and Y[1] != 0:
if modelID == 27:
RetY = Y[0]*Y[1]
elif modelID ==28:
RetY = t1*Y[0]*Y[1]
elif modelID == 29:
RetY = t2*Y[0]*Y[1]
# code reduced from here as well
return RetY
def EvalModelFitness(Stofloat,ExpData):
Sum = 0.0
for i in range(len(Stofloat)):
Sum += (Stofloat[i]-ExpData[i])**2
print Sum/len(Stofloat)
if y0[0] == 0 or y0[1] == 0:
NumModels = 28
else:
NumModels = 39
for j in range(1,NumModels+1):
S = odeint(func, y0,t_range,args=(j,k1,k2))
Stofloat = S[:,0].astype(type('float',(float,),{}))
EvalModelFitness(Stofloat,ExpData)