IndexError：索引2超出大小为2的轴0（列表调度）的边界

Question

尝试安排以下操作时出现问题。 for循环似乎有错误。特别是在这部分：mM[iRow,j] = p[k]。 但我不明白什么是错的。

m=2 # machines 
n= 4 # number of jobs 
p= np.array([1,2,3,4]) # processing times 
iTimemax = np.sum(p) 

# Initialisation 
iTime = 0 
k= 0      
iRow = 0 # the iRowth job of the machine 
mM=np.zeros((n,m)) 

for i in range (iTimemax): 
    for j in range (m): 
     if np.sum(mM[:,j]) <= iTime: 
      mM[iRow,j] = p[k] 
      k = k + 1 # next job to be assigned 
    iRow = iRow + 1 
    iTime = iTime +1 

Answer 1

你的p数组的长度是4，并且你在每次进入if条件时增加k。您需要在if条件中添加检查或在外部循环中重置k。

例如：

import numpy as np 
m=2 # machines 
n= 4 # number of jobs 
p= np.array([1,2,3,4]) # processing times 
iTimemax = np.sum(p) 

# Initialisation 
iTime = 0 
k= 0 
iRow = 0 # the iRowth job of the machine 
mM=np.zeros((n,m)) 
for i in range (iTimemax): 
    for j in range (m): 
     if np.sum(mM[:,j]) <= iTime and k < len(p): 
      mM[iRow,j] = p[k] 
      k = k + 1 # next job to be assigned 
    iRow = iRow + 1 
    iTime = iTime +1