How to delete text file some perticular lines using Matlab script

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vivek vala 2022-12-5

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评论： Mathieu NOE 2023-1-31

Hi I have one text file and in which if variable is not matching i need to delete that lines till end For example file is like this

FESTW Cbx_asdf_gh Xyz xyz Abs abs Ster sox END

GHRT Vbx_asdf_gh Xyz ans Anstg END

GBLOS xxx_asdf_gh Sstf Sgohe END

SO if the variable is not matching with defined variable in this case last one xxx then i need to delete that whole lines but i don't know how to delete lines till END because everytime END is ending at diff position like line no is not standard so how to delete that whole lines starting from GBLOS TO END (GBLOS xxx_asdf_gh Sstf Sgohe END)

So can you help me how to delete these lines it is having 40+ end like this and some variable is not matching so i need to delete all that till end

Thank you

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Answer 1

Mathieu NOE 2022-12-5

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编辑：Mathieu NOE 2022-12-5

在 MATLAB Online 中打开

hello

its' a bit confusing.... in other words you want to keep the lines that contain a certain variable name ?

then try this :

ll = readlines('text.txt'); % read text and convert to strings
defined_variable = 'Anstg'; % if ll does not contain that variable name , delete lines where it's missing
for ci = 1:numel(ll)
    tf = strfind(ll(ci),defined_variable);
    if isempty(tf)
        check(ci) = false;
    else
        check(ci) = true;
    end
end
ll_out = ll(check)