How can i filter a table with several variables
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Hey guys,
i have a table with four rows: String, String, Datetime and Double. I want to generate a new table with all four rows filtered by a startdate and a enddate that i can analyse for example just 10 years (2000-2010).
Thank you :)
1 个评论
%% sample data
dates = datetime - years(5:5:40)' + hours(randn(8,1));
doublesx = randn(8,1);
strings1 = ('a':char('a'+7))';
strings2 = ('m':char('m'+7))';
example_table = table(strings1,strings2,dates,doublesx)
%% new table selct
idx = (example_table.dates.Year >= 2000) & (example_table.dates.Year < 2010);
new_table = example_table(idx,:) %even if 3rd position dates
P.S. Actual or faux example table .mat file or generating code shared would be appreaciated and make it easier to help. You likely mean for example 4 colums and many row entries, but in case you do have a horizontal table it'd work all the same. Also the number of variables does not matter. You could also convert it to a timetable using table2timetable and then use timerange
采纳的回答
% an example table with four columns:
dt = datetime(2023,1,(1:10).');
A = string(rand(10,1));
B = string(rand(10,1));
C = rand(10,1);
t = table(A,B,dt,C)
% a logical array to be used as a filter (keep data from dates between
% Jan 3, 2023 and Jan 7, 2023, inclusive):
startDate = datetime(2023,1,3);
endDate = datetime(2023,1,7);
idx = t{:,3} >= startDate & t{:,3} <= endDate
% create the new table from just those dates:
new_t = t(idx,:)
更多回答（1 个）
Steven Lord
2023-1-3
0 个投票
If you turned your table into a timetable using table2timetable you could use a timerange to index into the rows of that timetable.
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