how to create series of indices from vectors of numbers

4 次查看（过去 30 天）

Liz 2011-11-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/22001-how-to-create-series-of-indices-from-vectors-of-numbers

Sorry for the obscure title, I think if i show an example it will be easy to understand. I have a vector of numbers: myvec = [ 1 45 70 ]; and I want to somehow generate a set of indices like this:

output = [1 2 3 4 5 6 7 8 9 10 11 45 46 47 48 49 50 51 52 53 54 55 70 71 72 73 74 75 76 77 78 79 80 ]

if i wrote a for loop, it would look like this:

for( i = 1:length(myvec) ) output = [output myvec(i):myvec(i)+10]; end

is there a simple, vectorized way to do this in matlab? for loops are terribly slow, and I want my code to be as fast as possible. thanks!

Liz

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。

采纳的回答

Wayne King 2011-11-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/22001-how-to-create-series-of-indices-from-vectors-of-numbers#answer_28963

在 MATLAB Online 中打开

Hi, one way:

    input  = [1 45 70];
    y = arrayfun(@(x) x:x+10,input,'uni',0);
    y = cell2mat(y);

3 个评论
显示 1更早的评论隐藏 1更早的评论

Liz 2011-11-22

thanks! that works great =)

Andrei Bobrov 2011-11-23

output = reshape(bsxfun(@plus,myvec,(0:10)'),1,[]);

请先登录，再进行评论。

类别

MATLAB Graphics Formatting and Annotation Labels and Annotations Title

在 Help Center 和 File Exchange 中查找有关 Title 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by