How to read and stores values from certain number of lines followed by a line starting as TS in a .txt file?

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Preyanka Dey 2020-10-1

0
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https://ww2.mathworks.cn/matlabcentral/answers/603298-how-to-read-and-stores-values-from-certain-number-of-lines-followed-by-a-line-starting-as-ts-in-a-t

编辑： Preyanka Dey 2020-10-2

datap.txt

Hi everyone,

Every time after the line starting as TS (in the attached datap.txt), I want to read the 1st, 5th, 19th, 33th, 47th and 52th lines.

Here, line number counted after TS, like (-9.19000000e+00=1st line) and (3.74000000e+00 = 5th line) after first TS line (TS 0 0.00000000e+00).

Accordingly, (-9.19000000e+00 = 1st line) and (4.06626222e+00 = 5th line) after 2nd TS line (TS 0 3.62884792e+03).

I also want to store all 1st line values in a vector

d1 = [-9.19000000e+00 -9.19000000e+00 .........]

5th line values in another vector

d5 = [3.74000000e+00 4.06626222e+00 ............] and so on.

In another vector I want to grab the numeric values at the end of TS lines, like

TS = [0.00000000e+00 3.62884792e+03 .........]

Can anyone please help me in this regard.

Thanks a lot :)

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Answer 1

Preyanka Dey 2020-10-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/603298-how-to-read-and-stores-values-from-certain-number-of-lines-followed-by-a-line-starting-as-ts-in-a-t#answer_504274

编辑：Preyanka Dey 2020-10-2

在 MATLAB Online 中打开

I solved...following is the answer if anyone need it....

function main
A = regexp(fileread('datap.txt'),'\n','split');
Whichline = find(~cellfun('isempty',...
    strfind(A,'TS 0  ')))
 
 gage5 = [];
 gage10 = [];
 gage13 = []; 
 gage19 = [];
 TS_sec = [];
 
 idx=[Whichline];
 n = length(idx);
 
 for i = 1:n
 TimeStp = regexp(A{idx(i)},' ','split');
 TS_sec = [TS_sec; TimeStp{4}];
 
 gage5 = [gage5; A{idx(i)+5}];
 gage10 = [gage10; A{idx(i)+10}];
 gage13 = [gage13; A{idx(i)+13}]; 
 gage19 = [gage19; A{idx(i)+19}]; 
 end
 gage5_m= str2num(gage5);
 gage10_m= str2num(gage10);
 gage13_m= str2num(gage13);
 gage19_m= str2num(gage19);
 T_sec= str2num(TS_sec); 
 
%1st Option
gtable = table(T_sec, gage5_m, gage10_m, gage13_m, gage19_m);
writetable(gtable,'gtable.dat','WriteVariableNames',true);
 write_files('Sroy.dat', T_sec, gage5_m, gage10_m, gage13_m, gage19_m);
end
function write_files(fname, T_sec, gage5_m, gage10_m, gage13_m, gage19_m)
fid = fopen(fname, 'w');
fprintf('%f %f %f %f %f\n',[T_sec gage5_m gage10_m gage13_m gage19_m]');
fprintf(fid,'%f %f %f %f %f\n',[T_sec gage5_m gage10_m gage13_m gage19_m]');    
fclose(fid);
end