How to create a vector?
2 ビュー (過去 30 日間)
古いコメントを表示
Hello everyone, Suppose with a for loop I get an array for each file (array could be of different lengths for each file). I want to get a column vector which will be merging of these arrays. So all the values of arrays from each file will be in this huge vector. Thank you for you help in advance.
0 件のコメント
採用された回答
Babak
2012 年 10 月 16 日
編集済み: Babak
2012 年 10 月 16 日
vector=[];
for j=1:n
% find newone that comes from file(j)
vector = [vector , newone]
end
2 件のコメント
Matt Kindig
2012 年 10 月 16 日
Keep in mind that if this is a "huge vector", then it might be rather slow due to a lack of memory pre-allocation. I would recommend something like this:
% vector is output from file(j)
r = size(vector,1);
Vector = NaN(r,n); %this is the pre-allocation step-- very important for memory management/efficiency!
Vector(:,1)=vector;
for j=2:n,
%newone comes from file(j)
Vector(:,j) = newone;
end
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Matrix Indexing についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!