Read Date time series format
14 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Life is Wonderful
el 17 de Ag. de 2019
Editada: per isakson
el 14 de Sept. de 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 comentarios
Guillaume
el 19 de Ag. de 2019
Can you please suggest someting else that is easy to do
Stick to one file format, the fixed width one in your previous question. Or use an even better one (e.g. comma delimited with text in quoted strings)
Otherwise, I'm afraid there's no easy way to do it. You'll have to use regexp or write your own parser.
Respuesta aceptada
Life is Wonderful
el 20 de Ag. de 2019
2 comentarios
Walter Roberson
el 20 de Ag. de 2019
The conversion looks perfect when I try.
timestamps.Format = 'dd-MMM-uuuu HH:mm:ss.SSSSSS';
>> timestamps(1:2)
ans =
1×2 datetime array
03-Aug-2019 13:58:25.745523 03-Aug-2019 13:58:25.746634
>> S(1:100)
ans =
'[0803/135825.745523:INFO:main.cc(182)] A/B Update Engine starting
[0803/135825.746634:INFO:boot_cont'
745523 and 746634 exactly match the input text.
Más respuestas (1)
Walter Roberson
el 19 de Ag. de 2019
S = fileread('update_engine.txt');
timestamps = regexp(S, '^.(.{18})', 'lineanchors', 'match');
ts_dt = datetime(timestamps, 'InputFormat', 'MMdd/HHmmss.SSSSSS');
4 comentarios
Walter Roberson
el 20 de Ag. de 2019
You can change the Format property to display the milliseconds.
Ver también
Categorías
Más información sobre Data Type Conversion en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!