添加一个循环以获得结果 'n' 次并将平均值放入 csv - Python

Question

我写了一个python函数用于粒子过滤。我需要为以下函数编写一个循环，以保存 csv 文件的最佳成本（变量）并获得平均值。

#loop should start here        
    pop_size=50
    #128 to #135 loop
    W = initial_population(region, scale , pop_size)

    pop = PatternPosePopulation(W, pat)
    pop.set_distance_image(imd)

    pop.temperature = 5

    Lw, Lc = pop.particle_filter_search(int(1000/pop_size),log=True)
    #Loop should end here for example run pop 50 x n times and store best_cost, take average of bestcost save to csv file.

    plt.plot(Lc)
    plt.title('Cost vs generation index')
    plt.show()

    print(pop.best_w)
    print(pop.best_cost)

如有任何帮助，我们将不胜感激。

Answer 1

best_costs = []
for iteration in range(n):     
    pop_size=50
    W = initial_population(region, scale , pop_size)

    pop = PatternPosePopulation(W, pat)
    pop.set_distance_image(imd)

    pop.temperature = 5

    Lw, Lc = pop.particle_filter_search(int(1000/pop_size),log=True)

    best_costs.append(pop.best_cost)#store the best cost for this iteration

    #Loop should end here for example run pop 50 x n times and store best_cost, take average of bestcost save to csv file.

    plt.plot(Lc)
    plt.title('Cost vs generation index')
    plt.show()

    print(pop.best_w)
    print(pop.best_cost)

#write to csv
best_cost_total = min(best_costs)
best_cost_avg = sum(best_costs) / n

results = [str(best_cost_total), str(best_cost_avg)]

with open('results.csv', 'w') as f:
    f.write(";".join(results))

这会将最佳成本和平均值写入 results.csv，并以 ; 作为分隔符。对于更具体的方法，需要更多信息...

编辑：你说得对，写入csv部分应该在循环之后

添加一个循环以获得结果 'n' 次并将平均值放入 csv - Python

Adding a loop to get result 'n' times and get the average into a csv - Python

python

csv

loops

particle-filter