我有一個am * m矩陣S中的diff eqs系統。S [i,j]是一個特定的物種濃度,受S [i -1,j]和S [i,j-1]用全矩陣(對象對於所需陣列來說物體太深)模擬笛子
我可以在每一步獲得每個條目的dx/dt(由update_matrix返回),但是我需要整合它來更新我的初始濃度(x相同作爲x_counts)。然而,scipy的integrate.odeint不接受矩陣作爲輸入(或返回值,並提出對象太深的錯誤。
任何方式,我可以調整這使用矩陣上的積分?我提供了一塊代碼:diffeq返回DX/dt的每個條目。update_matrix返回矩陣B,其中B [IJ] = DX [I,J]/dt的
def diffeq(x,i,j,coeffs):
if (i==1 and j==0):
return (-(coeffs.M(1,0)-coeffs.L(1,0)))+coeffs.d(1,0)-coeffs.get_phi()*x[1][0]
elif j==0:
return (-(coeffs.M(i,0)+coeffs.L(i,0)))*x[i][0]+coeffs.L(i-1,0)*x[i-1][0]+coeffs.d(i,j)-coeffs.get_phi()*x[i][0]
elif (i>1 and j>0):
return (-(coeffs.M(i,j)+coeffs.L(i,j)))*x[i][j]+coeffs.M(i,j-1)*x[i][j-1]+coeffs.L(i-1,j)*x[i-1][j]+coeffs.d(i,j)-coeffs.get_phi()*x[i][j]
elif i==1 and j>0:
return (-(coeffs.M(1,j)+coeffs.L(1,j)))*x[1][j]+coeffs.M(1,j-1)*x[1][j-1]+coeffs.d(1,j)-coeffs.get_phi()*x[1][j]
elif i==0 and j==1:
return -x[0][1]+coeffs.d(0,1)-coeffs.get_phi()*x[0][1]
elif i==0 and j>1:
return -j*x[0][j]+(j-1)*x[0][j-1]+coeffs.d(0,j)-coeffs.get_phi()*x[0][j]
def update_matrix(x,coeffs,m):
update_matrix=numpy.zeros((m,m))
for i in range(m+1):
for j in range(m+1-i):
update_matrix[m][m]=diffeq(x,i,j,coeffs)
return update_matrix
def run_simulation_R2(a,q,m):
x_counts=numpy.zeros((m,m))
x_counts[1][0]=1
x_counts[0][1]=1
coeffs=R2(a,q,m,x_counts)
t=range(0,100)
output = integrate.odeint(update_matrix, x_counts, t, args=(coeffs, m))
FYI:我創建了一個名爲'odeintw' odeint'的'的包裝,處理矩陣微分方程:HTTPS:/ /github.com/WarrenWeckesser/odeintw – 2014-05-15 03:45:08