关于数据元素的随机复制

Question

请考虑我的示例代码：

data=[-1 0 1 2]; % data 
N=[4,8,16]; % No. of desired output columns

现在创建一个输出矩阵，以便：

out=1xN % having each element of data randomly repeated exactly N/4 times

Answer 1

对于N作为标量，它很简单：

data=[-1 0 1 2];
N=  4
R = repmat(data', 1, N); %// You actually you don't really need the '
R(randperm(numel(R)))