Cut radio signal by hours

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Shahar ben ezra
Shahar ben ezra 2020-11-11
评论： Shahar ben ezra 2020-11-21
Hi
I have an excel file
I get in the file a date, hours and amplitude by frequency
How can I "cut" the hours as I wish
For example I want to get a new matrix but only between the hours of 00:00 and 12:00

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Walter Roberson
Walter Roberson 2020-11-11
https://www.mathworks.com/matlabcentral/answers/644295-how-do-to-get-a-specific-time-from-datetime-format-in-matlab#answer_541175
I26 = readtable(YourFileName);
mask = I26.time < hours(12);
selected_I26 = I26(mask,:);
This would extract only the entries before noon. <= if you want to include noon.
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Peter Perkins
Peter Perkins 2020-11-20
Walter's solution(s) are correct, but I recommend that for your first spreadsheet, you combine the date and time, and in the second you don't split them apart. Then turn your table into a timetable.
Recent versions of MATLAB have made importing durations more automatic, so you may or may not get durations automatically.
t = readtable("yourFile.xlsx")
t.data = t.data + t.time; % or t.data + duration(t.time)
tt = table2timetable(t(:,[1 4:end],'RowTimes',t.data);
ttMorning = tt(tt.Time.Hour <= 12,:);
Shahar ben ezra
Shahar ben ezra 2020-11-21
Tnx Peter Perkins :)
I will try that too

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