单参数GA优化时，不匹配报错

[flyinginte]

我想求一个单参数函数的最大值问题，但是最后报错说形状不匹配。

代码如下：

from sko.GA import GA
import math

def cal(x):
    return 1/(x * math.sin(10*math.pi*x) + 2)

ga = GA(func=cal, n_dim=1, size_pop=40, max_iter=200, prob_mut=0.001, lb=[-1], ub=[2], precision=1e-7)
best_x, best_y= ga.run()

print(best_x, best_y)

报错提示如下：

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-70-a1f0ff067adf> in <module>
      6 
      7 ga = GA(func=cal, n_dim=1, size_pop=40, max_iter=200, prob_mut=0.001, lb=[-1], ub=[2], precision=1e-7)
----> 8 best_x, best_y= ga.run()
      9 
     10 print(best_x, best_y)

C:\Users\FLJ\Anaconda3\lib\site-packages\sko\GA.py in run(self, max_iter)
     81             self.ranking()
     82             self.selection()
---> 83             self.crossover()
     84             self.mutation()
     85 

C:\Users\FLJ\Anaconda3\lib\site-packages\sko\operators\crossover.py in crossover_2point_bit(self)
     42         mask[i, n1:n2] = 1
     43     mask2 = (Chrom1 ^ Chrom2) & mask
---> 44     Chrom1 ^= mask2
     45     Chrom2 ^= mask2
     46     return self.Chrom

ValueError: non-broadcastable output operand with shape (20,1,25) doesn't match the broadcast shape (20,20,25)

不知道什么原因，希望有人给解释一下，谢谢大家！

[Lesile-Liu]

The function return numpy array. You can change it to scalar. For example sum(1/(x * math.sin(10math.pix) + 2))

[flyinginte]

It does works!
Although I can not fully understand it yet.
thank you for your professional answers!