MATLAB Answers

Read Date time series format

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Jogger
Jogger on 17 Aug 2019
Edited: per isakson on 14 Sep 2019
I want to read Date and time series from below format
% file.txt has time formatted data
[0803/135825.745523:GGBB:main.cc(182)]
[0803/135825.746634:NNFF:boat_control_xhramyos.cc(137)]
% My Code is as follows
VariableNames = {'Date'};
VariableWidths = [20]
VariableTypes = {'datetime'};
opts = fixedWidthImportOptions('VariableNames','SelectedVariableNames', [1]);
opts = setvaropts(opts, 'Date', 'InputFormat', 'MMdd/HHmmss.SSSSSS');
Content.update_engine = readtable('file.txt', opts);
I am getting following error as I am unable to read the time properly.
Warning: Unable to convert one or more variables to datetime. Specify the correct
InputFormat and DatetimeLocale properties in the DatetimeVariableImportOptions.
> In matlab.io.internal.functions.ReadTableWithImportOptionsText/executeImpl (line 82)
In matlab.io.internal.functions.ReadTableWithImportOptions/executeImpl (line 18)
In matlab.io.internal.functions.ReadTableWithImportOptionsText/execute (line 122)
In matlab.io.internal.functions.ReadTableWithImportOptions/execute (line 25)
In matlab.io.internal.functions.ExecutableFunction/validateAndExecute (line 98)
  8 Comments
Jogger
Jogger on 19 Aug 2019

OK if no other choices left .Can you please help me with sample script here

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Accepted Answer

Jogger
Jogger on 20 Aug 2019
milliseconds information is in place(.SSSSSS)but conversion is not done properly.
  2 Comments
Jogger
Jogger on 21 Aug 2019
Thanks a lot for your efforts.

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More Answers (1)

Walter Roberson
Walter Roberson on 19 Aug 2019
S = fileread('update_engine.txt');
timestamps = regexp(S, '^.(.{18})', 'lineanchors', 'match');
ts_dt = datetime(timestamps, 'InputFormat', 'MMdd/HHmmss.SSSSSS');
  4 Comments
Walter Roberson
Walter Roberson on 20 Aug 2019
You can change the Format property to display the milliseconds.

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