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Hendrik Möllersmann
2026-02-06 15:49:36 +01:00
parent 0eeb35f173
commit 50326ba246
5 changed files with 2042 additions and 206 deletions
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13
Hansen_ES_CMA.py
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@@ -64,7 +64,7 @@ def escma(func, *, N=10, xmean=None, sigma=0.5, stopfitness=1e-14, stopeval=2000
gen = 0
print(f' [CMA-ES] Start: lambda = {lambda_}, sigma ={round(sigma, 6)}, stopeval = {stopeval}')
# print(f' [CMA-ES] Start: lambda = {lambda_}, sigma ={round(sigma, 6)}, stopeval = {stopeval}')
while counteval < stopeval:
gen += 1
@@ -95,14 +95,15 @@ def escma(func, *, N=10, xmean=None, sigma=0.5, stopfitness=1e-14, stopeval=2000
if gen == 1 or gen%50==0:
print(f' [CMA-ES] Gen {gen}, best = {round(fbest, 6)}, sigma = {sigma:.3g}')
# print(f' [CMA-ES] Gen {gen}, best = {round(fbest, 6)}, sigma = {sigma:.3g}')
pass
if noImproveGen >= maxNoImproveGen:
print(f' [CMA-ES] Abbruch: keine Verbesserung > {round(absTolImprove, 3)} in {maxNoImproveGen} Generationen.')
# print(f' [CMA-ES] Abbruch: keine Verbesserung > {round(absTolImprove, 3)} in {maxNoImproveGen} Generationen.')
break
if sigma < sigmaImprove:
print(f' [CMA-ES] Abbruch: sigma zu klein {sigma:.3g}')
# print(f' [CMA-ES] Abbruch: sigma zu klein {sigma:.3g}')
break
@@ -140,7 +141,7 @@ def escma(func, *, N=10, xmean=None, sigma=0.5, stopfitness=1e-14, stopeval=2000
# Escape flat fitness, or better terminate?
if arfitness[0] == arfitness[int(np.ceil(0.7 * lambda_)) - 1]:
sigma = sigma * np.exp(0.2 + cs / damps)
print(' [CMA-ES] stopfitness erreicht.')
# print(' [CMA-ES] stopfitness erreicht.')
#print("warning: flat fitness, consider reformulating the objective")
break
@@ -150,7 +151,7 @@ def escma(func, *, N=10, xmean=None, sigma=0.5, stopfitness=1e-14, stopeval=2000
#print(f"{counteval}: {arfitness[0]}")
xmin = arx[:, arindex[0]]
bestValue = arfitness[0]
print(f' [CMA-ES] Ende: Gen = {gen}, best = {round(bestValue, 6)}')
# print(f' [CMA-ES] Ende: Gen = {gen}, best = {round(bestValue, 6)}')
return xmin