getting even elements from vector

25 次查看（过去 30 天）
avner yakov
avner yakov 2016-12-30
评论： carlos edurdo condori ochoa 2020-8-28
i'm trying to create new vector from another vector with only the odd elements of the of vectorr. i tried this:
for i=length(q1)
if mod(i,2)==0
a1(i,:)=q1(i,:);
else
a1(i,:)=[];
end
end
when q1 is the old vector and a1 is the new one and q1 is a column vector so i'm trying to duplicate his even row's

请先登录，再回答此问题。

回答（1 个）

KSSV
KSSV 2016-12-30
You can extract the even indices and odd indices at one stretch without loop.
k = rand(1,10) ;
% even index values
iwant_even = k(2:2:end) ;
% odd index values
iwant_odd = k(1:2:end) ;
  3 个评论
显示 1更早的评论
Om Yadav
Om Yadav 2020-4-5
This is a good answer. This is what I was looking for. A word of advice, avoid using for loop as much as possible in MATLAB, make use of vectorization instead. MATLAB is made for this.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Shifting and Sorting Matrices 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by