在Mathematica中反转Flatten？

Question

什么是f [x _]的倒数：= Flatten [x]其中x是具有维度变暗的数组？

Answer 1

There is no built-in function, but it's pretty easy with a combination of Fold and Partition :

In[47]:= x1 = RandomReal[{0, 1}, {3, 4, 5}];

In[48]:= dims = Dimensions[x1]

Out[48]= {3, 4, 5}

In[49]:= x2 = Fold[Partition, Flatten[x1], Most[Reverse[dims]]];

In[50]:= x1 == x2

Out[50]= True

Answer 2

你可能想要Partition[]或其中一个亲戚。