清空筛选条件
清空筛选条件

fastest way to read in every m lines of a file sequentially?

1 次查看（过去 30 天）
Adam
Adam 2014-11-29
编辑： Azzi Abdelmalek 2014-11-29
I need to read in every 100 lines of a very large file. Then I so some calculations with the data of those 100 lines then I get the next 100 lines (in order) and do the same set of calculations...and repeat until the last set of 1000 lines of the very large file. I cannot read in the entire large file at once, as it is too big.
What is the best (fastest) way to do this?
I already know the basic structure:
while(~feof(myfile))
a=fgetl(myfile)
end
Thanks!

请先登录，再回答此问题。

回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-11-29
编辑：Azzi Abdelmalek 2014-11-29
fid=fopen(myfile)
k=0;
a=cell(1,100)
while ~feof(fid)
k=k+1
a{k}=fgetl(fid)
if mod(k,100)==0
%do your calculations
end
end
fclose(fid)

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 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