arrays - Structure array or cell array

Question

I can define my data structure by two different ways:

Number 1:

for i = 1:3, matrix.a{1,i} = rand(1,2000000); end
for i = 1:3, matrix.a{2,i} = rand(1,2000000); end
for i = 1:3, matrix.g{2,i} = rand(1); end
for i = 1:3, matrix.g{1,i} = rand(1); end

Number 2:

for i = 1:3, matrix2(1,i).a = rand(1,2000000); end
for i = 1:3, matrix2(2,i).a = rand(1,2000000); end
for i = 1:3, matrix2(1,i).g = rand(1); end
for i = 1:3, matrix2(2,i).g = rand(1); end

Is one of them a much more efficient way?

Thanks!

Answer 1

检查whos matrix matrix2，这将向您显示两种替代方案的内存使用情况。

无需过多考虑，它应该非常相似 - 它肯定与随机数所需的内存相比。

Answer 2

没有太大的区别，都包含 6 个矩阵和 2 000 000 个元素，这是重要的部分，没有变化。您可以将代码tic toc（没有显着差异。whosx=rand(6,2000001)