Facing problems in writing data to a .dat file?

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Preyanka Dey
Preyanka Dey 2020-10-2
回答： Preyanka Dey 2020-10-2
Hi everyone!
After extracting data from the attached datapp.txt file when I tried to write it again in a output.dat file, I am not getting the results the way I want. I guess its because the variables are read as a character array. However, I don't know how to deal with it. The written output.dat file should be in the following format.....
TS_sec gage5 gage10 gage13 gage19
0.00000000e+00 3.74000000e+00 4.62000000e+00 -6.32000000e+00 3.70000000e+00
3.62884792e+03 4.06626222e+00 4.94714691e+00 -6.02841756e+00 4.02629196e+00
7.37845996e+03 3.70195900e+00 4.58459573e+00 -6.37805257e+00 3.66177872e+00
I have tried the following code.........Could you guys please help me in this regard. Thanks....## My Problem is in writing output files in the above mentioned format.
function main
A = regexp(fileread('datap.dat'),'\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
% 1st Option
gtable = table(TS_sec,gage5,gage10,gage13,gage19);
writetable(gtable,'gtable.dat','WriteVariableNames',true);
%2nd option
%write_files('gtables.dat', TS_sec, gage5, gage13, gage19);
end
function write_files(fname, TS_sec, gage5, gage13, gage19)
fid = fopen(fname, 'w');
fprintf('%s %s %s %s\n',[TS_sec gage5 gage13 gage19]');
fprintf(fid,'%s %s %s %s\n',[TS_sec gage5 gage13 gage19]');
fclose(fid);
end

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采纳的回答

Preyanka Dey
Preyanka Dey 2020-10-2
Yeyy! I solved it...following is the code...if somebody need it...
function main
A = regexp(fileread('datap.dat'),'\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

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