插入新的值到一个数组 [英] Insert new values into an array

问题描述

目前，我有不同长度的列向量，我想在原来的阵列中的各个点插入另一列向量。即我想我的新阵列添加到旧数组的开始跳过10个地方再次添加我的新阵，又跳过10个空格，再等我添加新的数组，直到数组末尾。我可以通过这样做：

I currently have a column vectors of different lengths and I want to insert another column vector at various points of the original array. i.e. I want to add my new array to the start of the old array skip 10 places add my new array again, skip another 10 spaces and add my new array again and so on till the end of the array. I can do this by using:

OffsetSign = [1:30]';
Extra = [0;0;0;0;0];
OffsetSign =[Extra;OffsetSign(1:10);Extra;OffsetSign(11:20);Extra;OffsetSign(21:30)];

然而，这不适合于较长的阵列。在一个简单的方法任何提示，以更长的数组做到这一点？

However this is not suitable for longer arrays. Any tips on an easy way to do this for longer arrays?

推荐答案

下面是做到这一点的一种方法：

here's one way to do it:

a = [1:30]';
b = [0;0;0;0;0];

a=reshape(a,10,[]);
b=repmat(b,[1 size(a,2)])
r=[b ; a]
r=r(:);

关键是要重塑 A 用大小合适的列的矩阵（每次10元）。复制 B 来此＃栏目，既串联和扁平化矩阵为矢量...

the trick is to reshape a to a matrix with columns of the right size (10 elements each). Replicate b to this # of columns , concatenate both and flatten the matrix to a vector...

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