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目标函数、迭代次数、求解时间和求解状态在 Gekko 中可用:
m.options.OBJFCNVAL
m.options.ITERATIONS
m.options.SOLVETIME
m.options.APPSTATUS
您可以像我对summary
.
from gekko import GEKKO
import numpy as np
def model(plot=False):
t = np.linspace(0, 1, 101)
m = GEKKO(remote=False); m.time=t
fe = m.Param(np.cos(2*np.pi*t)+3)
de = m.Var(fe[0])
e = m.CV(0); e.STATUS=1; e.SPHI=e.SPLO=0; e.WSPHI=1000; e.WSPLO=1
der = m.MV(0, lb=-1, ub=1); der.STATUS=1
m.Equations([de.dt() == der, e == fe-de])
m.options.DIAGLEVEL=1
m.options.SOLVER=1
m.options.IMODE=6; m.solve()
if plot:
import matplotlib.pyplot as plt
plt.plot(t, fe)
plt.plot(t, de)
plt.plot(t, der)
plt.savefig('result.png')
return [m.options.OBJFCNVAL,\
m.options.ITERATIONS,\
m.options.SOLVETIME,\
m.options.APPSTATUS]
if __name__ == "__main__":
summary = model(plot=True)
print(summary)
如果你想要函数调用,那就稍微复杂一点,因为有不同类型的函数调用。有目标函数和约束的函数调用、一阶导数的函数调用和二阶导数的函数调用。m.options.DIAGLEVEL=1您可以通过设置或更高获得所有子程序调用以及每个子程序调用的个人和累积时间的完整报告。这是此问题的求解器输出:
Number of state variables: 1900
Number of total equations: - 1800
Number of slack variables: - 0
---------------------------------------
Degrees of freedom : 100
----------------------------------------------
Dynamic Control with APOPT Solver
----------------------------------------------
Iter Objective Convergence
0 9.81590E+01 1.00000E+00
1 7.62224E+01 4.00000E-10
2 7.62078E+01 1.10674E-02
3 7.62078E+01 1.00000E-10
4 7.62078E+01 8.32667E-17
5 7.62078E+01 8.32667E-17
Successful solution
---------------------------------------------------
Solver : APOPT (v1.0)
Solution time : 0.5382 sec
Objective : 76.20778997271815
Successful solution
---------------------------------------------------
某些求解器(如 IPOPT)没有可从 API 轻松获得的迭代,因此它们始终报告为零。对于 APOPT,摘要列表是[76.207789973, 5, 0.5253, 1]. 时序和函数调用报告在求解器摘要之后。
Timer # 1 0.70/ 1 = 0.70 Total system time
Timer # 2 0.54/ 1 = 0.54 Total solve time
Timer # 3 0.05/ 9 = 0.01 Objective Calc: apm_p
Timer # 4 0.00/ 5 = 0.00 Objective Grad: apm_g
Timer # 5 0.02/ 9 = 0.00 Constraint Calc: apm_c
Timer # 6 0.00/ 0 = 0.00 Sparsity: apm_s
Timer # 7 0.00/ 0 = 0.00 1st Deriv #1: apm_a1
Timer # 8 0.00/ 5 = 0.00 1st Deriv #2: apm_a2
Timer # 9 0.02/ 200 = 0.00 Custom Init: apm_custom_init
Timer # 10 0.00/ 200 = 0.00 Mode: apm_node_res::case 0
Timer # 11 0.00/ 600 = 0.00 Mode: apm_node_res::case 1
Timer # 12 0.00/ 200 = 0.00 Mode: apm_node_res::case 2
Timer # 13 0.00/ 400 = 0.00 Mode: apm_node_res::case 3
Timer # 14 0.00/ 4800 = 0.00 Mode: apm_node_res::case 4
Timer # 15 0.00/ 2000 = 0.00 Mode: apm_node_res::case 5
Timer # 16 0.00/ 0 = 0.00 Mode: apm_node_res::case 6
Timer # 17 0.00/ 5 = 0.00 Base 1st Deriv: apm_jacobian
Timer # 18 0.02/ 5 = 0.00 Base 1st Deriv: apm_condensed_jacobian
Timer # 19 0.00/ 1 = 0.00 Non-zeros: apm_nnz
Timer # 20 0.00/ 0 = 0.00 Count: Division by zero
Timer # 21 0.00/ 0 = 0.00 Count: Argument of LOG10 negative
Timer # 22 0.00/ 0 = 0.00 Count: Argument of LOG negative
Timer # 23 0.00/ 0 = 0.00 Count: Argument of SQRT negative
Timer # 24 0.00/ 0 = 0.00 Count: Argument of ASIN illegal
Timer # 25 0.00/ 0 = 0.00 Count: Argument of ACOS illegal
Timer # 26 0.00/ 1 = 0.00 Extract sparsity: apm_sparsity
Timer # 27 0.00/ 17 = 0.00 Variable ordering: apm_var_order
Timer # 28 0.00/ 1 = 0.00 Condensed sparsity
Timer # 29 0.00/ 0 = 0.00 Hessian Non-zeros
Timer # 30 0.00/ 3 = 0.00 Differentials
Timer # 31 0.00/ 0 = 0.00 Hessian Calculation
Timer # 32 0.00/ 0 = 0.00 Extract Hessian
Timer # 33 0.00/ 1 = 0.00 Base 1st Deriv: apm_jac_order
Timer # 34 0.06/ 1 = 0.06 Solver Setup
Timer # 35 0.40/ 1 = 0.40 Solver Solution
Timer # 36 0.00/ 23 = 0.00 Number of Variables
Timer # 37 0.00/ 12 = 0.00 Number of Equations
Timer # 38 0.05/ 17 = 0.00 File Read/Write
Timer # 39 0.00/ 1 = 0.00 Dynamic Init A
Timer # 40 0.02/ 1 = 0.02 Dynamic Init B
Timer # 41 0.02/ 1 = 0.02 Dynamic Init C
Timer # 42 0.00/ 1 = 0.00 Init: Read APM File
Timer # 43 0.00/ 1 = 0.00 Init: Parse Constants
Timer # 44 0.00/ 1 = 0.00 Init: Model Sizing
Timer # 45 0.00/ 1 = 0.00 Init: Allocate Memory
Timer # 46 0.00/ 1 = 0.00 Init: Parse Model
Timer # 47 0.00/ 1 = 0.00 Init: Check for Duplicates
Timer # 48 0.00/ 1 = 0.00 Init: Compile Equations
Timer # 49 0.00/ 1 = 0.00 Init: Check Uninitialized
Timer # 50 0.00/ 205 = 0.00 Evaluate Expression Once
Timer # 51 0.00/ 0 = 0.00 Sensitivity Analysis: LU Factorization
Timer # 52 0.00/ 0 = 0.00 Sensitivity Analysis: Gauss Elimination
Timer # 53 0.00/ 0 = 0.00 Sensitivity Analysis: Total Time
计时器 3、4 和 5 可能与您的问题最相关。它们是目标函数请求、一阶导数请求和约束评估请求。
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