delete consecutive commas in txt file

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I have the next txt file that has more than one ',' between numbers and i only want 1 comma between my numbers
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
0.00443747926701899,0.0415007916135113,0.0507606123682882,,0.118547629187242,,,,,,,,,0.300291185258514,,,,,,,,,,,,,,,,,,,,0.410219670837715,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,0.698099828162265
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
  2 Commenti
Stephen23
Stephen23 il 12 Set 2022
What should happen with lines that only contain commas: do you want to keep them, or remove them?
george korris
george korris il 12 Set 2022
@Stephen23thank you for your time.
remove them!

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Risposta accettata

Star Strider
Star Strider il 12 Set 2022
Modificato: Star Strider il 12 Set 2022
Use readmatrix with additional name-value pair arguments to select the delimiter and combine multiple consecutive delimiters. See the documentation section on Text Files Only for details on these and other Name-Value Arguments.
M1 = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1122645/ca.txt', 'Delimiter',',', 'ConsecutiveDelimitersRule','join', 'LeadingDelimitersRule','ignore')
M1 = 8×9
0.0044 0.0415 0.0508 0.1185 0.1397 0.2522 0.3003 0.4102 0.6981 0.0361 0.1039 0.1559 0.1819 0.2685 0.4436 0.5813 0.8723 1.2182 0.0766 0.2214 0.2013 0.3533 0.5310 0.9182 1.1550 1.4976 1.9698 0.0721 0.5354 0.6176 0.6157 1.2760 1.7109 1.9629 2.4014 2.9319 0.2162 0.2679 1.3769 1.7134 2.1104 2.6804 3.0724 3.2769 4.0396 1.4989 1.6092 2.2079 2.4976 2.7068 3.8842 3.8599 4.3714 4.6691 1.7589 2.4418 2.3176 3.3207 3.0543 4.3723 4.3590 4.6367 4.8807 0.1454 2.1400 2.5672 3.5504 3.3989 4.4617 4.5724 5.0063 4.9371
.
  4 Commenti
george korris
george korris il 12 Set 2022
Thank you so much @Star Strider!!! You are amazing!!!!!
Star Strider
Star Strider il 12 Set 2022
As always, my pleasure!
Thank you!

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Più risposte (2)

Simon Chan
Simon Chan il 12 Set 2022
May be this:
rawdata = readlines('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1122645/ca.txt');
iwant = [];
for k = 1:length(rawdata)
data = str2double(strsplit(rawdata{k},','));
if ~all(isnan(data))
iwant = [iwant;data];
end
end
iwant
iwant = 8×9
0.0044 0.0415 0.0508 0.1185 0.1397 0.2522 0.3003 0.4102 0.6981 0.0361 0.1039 0.1559 0.1819 0.2685 0.4436 0.5813 0.8723 1.2182 0.0766 0.2214 0.2013 0.3533 0.5310 0.9182 1.1550 1.4976 1.9698 0.0721 0.5354 0.6176 0.6157 1.2760 1.7109 1.9629 2.4014 2.9319 0.2162 0.2679 1.3769 1.7134 2.1104 2.6804 3.0724 3.2769 4.0396 1.4989 1.6092 2.2079 2.4976 2.7068 3.8842 3.8599 4.3714 4.6691 1.7589 2.4418 2.3176 3.3207 3.0543 4.3723 4.3590 4.6367 4.8807 0.1454 2.1400 2.5672 3.5504 3.3989 4.4617 4.5724 5.0063 4.9371
  1 Commento
george korris
george korris il 12 Set 2022
Hi @Simon Chan when i run your code in my pc i get the following error:
Unrecognized function or variable 'readlines'.
Thank you for your time!

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Mathieu NOE
Mathieu NOE il 12 Set 2022
hello
maybe not the best code but seems to do the job !
filename = 'ca.txt';
a = readlines(filename);
[m,~] = size(a);
count = 0;
for ci = 1:m
current_line = char(a(ci,:));
out_comas= strfind(current_line,',');
if numel(out_comas) < numel(current_line) % keep this line
count = count+1;
% remove extra comma separators
out_comas= strfind(current_line,',');
d = [0 diff(out_comas)];
ind = find(d == 1);
line_out = current_line;
line_out(out_comas(ind)) = [];% remove extra comma separators
C{count,1} = line_out;
end
end
% export to txt file
writecell(C,'ca_out.txt',"QuoteStrings",false)
  5 Commenti
Mathieu NOE
Mathieu NOE il 12 Set 2022
here a workaround :
function lines = my_readlines(filename)
% work around for earlier matlab releases (not having readlines)
lines = regexp(fileread(filename), '\r?\n', 'split');
if isempty(lines{end}); lines(end) = []; end %end of file correction
end
george korris
george korris il 13 Set 2022
Thank you very much!!!

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