Convert a vector to vector sequentially?

Question

Nguyen Trong Nhan 2020-1-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/498764-convert-a-vector-to-vector-sequentially

回答： Walter Roberson 2020-1-3

I have 2 vector: init = [1 2 3 4], final =[5 6 7 8]. I would like to genertate all the vector like the following:

[1 2 3 4] [5 2 3 4] [5 6 3 4] [5 6 7 4] [5 6 7 8]. Is there anyway to do this fast using some special function available in matlab?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2020-1-3

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/498764-convert-a-vector-to-vector-sequentially#answer_408498

在 MATLAB Online 中打开

%assuming init and final are the same size!!
init = [1 2 3 4];
final =[5 6 7 8];
output = repmat(init(:), 1, length(init));
toutput = repmat(final(:), 1, length(init));
mask = triu(true(size(output)),1);
output(mask) = toutput(mask);

And now the outputs are down the columns. If you really want vectors,

num2cell(output,1)

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Stephen23 2020-1-3

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/498764-convert-a-vector-to-vector-sequentially#answer_408497

在 MATLAB Online 中打开

>> init  = [1 2 3 4]
>> final = [5 6 7 8]
>> X = triu(ones(5,4));
>> M = init.*X + final.*~X
M =
   1   2   3   4
   5   2   3   4
   5   6   3   4
   5   6   7   4
   5   6   7   8