Effacer les filtres
Effacer les filtres

Parsing and editing txt file line by line

3 vues (au cours des 30 derniers jours)
Elzbieta
Elzbieta le 19 Juin 2024
Commenté : Voss le 8 Juil 2024
Hello,
How to automatically transform a txt file in this form by removing strings start and end:
Onset,Annotation
+234.3428079,start
+244.1317829,end
+255.1007751,start
+263.0000000,end
to this form:
+234.3428079,+244.1317829
+255.1007751,+263.0000000
Regards

Réponse acceptée

Voss
Voss le 19 Juin 2024
filename_in = 'test.txt';
filename_out = 'test_out.txt';
% show the input file's content, for reference
type(filename_in)
Onset,Annotation +234.3428079,start +244.1317829,end +255.1007751,start +263.0000000,end
% read filename_in into a table of size n-by-2 containing strings
opts = detectImportOptions(filename_in);
opts = setvartype(opts,opts.VariableNames,'string');
T = readtable(filename_in,opts);
% reshape the first table variable to size n/2-by-2 appropriately,
% and write it to the output file
writematrix(reshape(T{:,1},2,[]).',filename_out)
% check the output
type(filename_out)
+234.3428079,+244.1317829 +255.1007751,+263.0000000
  4 commentaires
Elzbieta
Elzbieta le 8 Juil 2024
Hello,
While processing the following file:
Onset,Annotation
+234.0000000,start
+354.0000000,end
+586.0000000,start
+704.0000000,end
+938.0000000,start
+1056.0000000,end
+1396.0000000,start
+1400.0000000,end
+1810.0000000,start
+1928.0000000,end
+2162.0000000,start
+2282.0000000,end
+2514.0000000,start
+2595.0000000,end
+2612.0000000,start
+2615.0000000,start
+2630.0000000,end
+2865.0000000,start
+2971.0000000,end
+3215.0000000,start
+3332.0000000,end
I am receiving the following error:
Error using reshape
Product of known dimensions, 2, not divisible into total number of elements, 21.
Error in parseTxtAnnotations (line 20)
writematrix(reshape(T{:,1},2,[]).',filename_out)
I am using the following code:
pathInputFolder = 'C:\Users\admin\Documents\MATLAB\PROVIDE\database28_05_2024\mat_files\ECG\trial_ECG_data_txt\trial_ECG_data_edf\edited_3\annotations\';
%filename_in = fullfile(pathInputFolder,[names{i},'_trial_ECG_data_edited_annotations.txt'])
filename_in = 'C:\Users\admin\Documents\MATLAB\PROVIDE\database28_05_2024\mat_files\ECG\trial_ECG_data_txt\trial_ECG_data_edf\edited_3\annotations\Alfredo_trial_ECG_data_edited_annotations.txt';
filename_out = 'C:\Users\admin\Documents\MATLAB\PROVIDE\database28_05_2024\mat_files\ECG\trial_ECG_data_txt\trial_ECG_data_edf\edited_3\annotations\Alfredo_trial_ECG_data_annotations_edited_parsed.txt';
% show the input file's content, for reference
type(filename_in)
% read filename_in into a table of size n-by-2 containing strings\
opts = detectImportOptions(filename_in);
opts = setvartype(opts,opts.VariableNames,'string');
T = readtable(filename_in,opts);
% reshape the first table variable to size n/2-by-2 appropriately,
% and write it to the output file
writematrix(reshape(T{:,1},2,[]).',filename_out)
% check the output
type(filename_out)
Could you tel me where the problem can be found?
Voss
Voss le 8 Juil 2024
The file has two "starts" in a row, at +2612.0000000 and +2615.0000000, with no "end" in between.

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