矩阵列表的均值 [英] Mean of list of matrices by element

问题描述

我有一个矩阵列表:

 .list <- list(matrix(1:25, ncol = 5), matrix(11:35, ncol = 5))

我想使用Reduce方法在列表中查找矩阵的逐元素方法.

I would like to use the Reduce method to find the element-by-element means of the matrices in the list.

换句话说，我正在寻找以下结果:

In other words, I am looking for the following result:

 res = matrix(6:30, ncol = 5)

我尝试了以下操作:

 res = Reduce(mean, .list)

但是我得到一个错误:

Error in mean.default(init, x[[i]]) : 
  'trim' must be numeric of length one

请注意，矩阵的元素可以是NA. 任何帮助，将不胜感激！谢谢！！

Note that an element of a matrix can be NA. Any help would be appreciated! Thank you!!

推荐答案

我刚刚意识到可以通过以下方式(使用Reduce函数)实现此目的:

I just realized that this could be achieved the following way (using the Reduce function):

 tmp = Reduce('+', .list)
 result = tmp/length(.list)

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