Loop through files of different length

3 次查看（过去 30 天）
Emu
Emu 2022-10-6
评论： dpb 2022-10-6
I am trying to loop through some data files of differing length, but at the moment I have to set the length manually for each file, so my code keeps breaking:
hrsInf(1,1) = sum(ECGdata(1:h,1)==0)/h*100;
hrsInf(2,1) = sum(ECGdata(h+1:2*h,1)==0)/h*100;
hrsInf(3,1) = sum(ECGdata(2*h+1:3*h,1)==0)/h*100;
hrsInf(4,1) = sum(ECGdata(3*h+1:4*h,1)==0)/h*100;
hrsInf(5,1) = sum(ECGdata(4*h+1:5*h,1)==0)/h*100;
hrsInf(6,1) = sum(ECGdata(5*h+1:6*h,1)==0)/h*100;
and so on, where h is one hour (with a 250psec sampling rate). How can I loop through each file to the maximum number of whole hours?

请先登录，再回答此问题。

采纳的回答

dpb
dpb 2022-10-6
When you compute what h is in samples (if sample rate varies, otherwise just set it as a constant), then
[R,C]=size(ECGdata);
N=fix(R/h);
tmp=reshape(ECGdata(1:N*h,1),h,[]);
hrsInf=sum(tmp==0)/h*100;
  2 个评论
Emu
Emu 2022-10-6
oh my goodness thank you so much !!
dpb
dpb 2022-10-6
Yeah, taking advantage of knowledge of storage order and that most MATLAB functions operate by default by column can save a lot of gyrations otherwise...
Another way to do stuff similar to this if have Image TB is blockproc

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

产品


版本

R2020b

Community Treasure Hunt

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

Start Hunting!

Translated by