问题
How do I reorder the dimensions of an n dimensional array. For example, if I have a three dimensional array of sales data, where the first dimension represents the Date, the second dimension is the Store, and the third dimension is Department. How do I transform the array so that the first dimension is Store, the second is Department, and the third is Date. This is just an example. I am hoping for a general solution.
回答1:
The function for doing that is aperm, from the base package. It is a generalization of the transpose t() function to multidimensional arrays. For your example, you would call it as follows:
new.data <- aperm(old.data, c(2,3,1))
来源：https://stackoverflow.com/questions/10679131/how-to-change-order-of-array-dimensions