file that i am reading in loop changes in file

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Ihaveaquest 2022-9-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1811025-file-that-i-am-reading-in-loop-changes-in-file

评论： Ihaveaquest 2022-9-27

for idx = 1:length(alfiles)
    if contains(alfiles(idx).name,'tx01')
        v=v+1;
        temp(v)= alfiles(idx);  

thsi is where the issues comes up - my alfiles are not always going to be of size 3 - in may bes less or more - how may i modify it

        if v ==3 
            [~, index]  = max([temp.datenum]);
            files(1) = temp(index);
        end
    elseif contains(alfiles(idx).name,'tx02')
        v=v+1;
        temp(v)= alfiles(idx);  
        if v ==6 
            [~, index]   = max([temp.datenum]);
            files(2) = temp(index);
        end

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Rik 2022-9-24

If you want to test whether v is equal to the number of elements in alfiles, why don't you test that instead of hard-coding 3? Or is your question how to prevent the test if the number of elements is more than 3?

What do you want to happen?

Ihaveaquest 2022-9-26

编辑：Rik 2022-9-27

在 MATLAB Online 中打开

i was comfusing myself sorry

figure it out

for idx = 1:length(alfiles)
    if contains(alfiles(idx).name,'tx01')
        v=v+1;
        temp(v)= alfiles(idx);   
        [~, index]  = max([temp.datenum]);
        files(1) = temp(index);

there was no reasonn for the second if stament

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Answer 1

Ihaveaquest 2022-9-26

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1811025-file-that-i-am-reading-in-loop-changes-in-file#answer_1061175

编辑：Rik 2022-9-27

在 MATLAB Online 中打开

i was comfusing myself sorry

figure it out

for idx = 1:length(alfiles)
    if contains(alfiles(idx).name,'tx01')
        v=v+1;
        temp(v)= alfiles(idx);   
        [~, index]  = max([temp.datenum]);
        files(1) = temp(index);

there was no reasonn for the second if stament

2 个评论
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Rik 2022-9-27

You should make it a habit to use numel instead of length. Calling length is equivalent to max(size(A)), which is almost never what you want.

Ihaveaquest 2022-9-27

Thank you, that is a great advise! after reading about numel it sure does help in preventing few of the issues i have had by using max and size......great catch!

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