Changing the values of a column in a table.
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If I have a table ..datafi{1}.. and I want to change the time column, t, from all the times being different to all the times being the same time as the first time listed in the column, how do I do that in Matlab?
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per isakson
am 28 Jan. 2021
Bearbeitet: per isakson
am 28 Jan. 2021
This statement does it
tbl.t = tbl.t(ones(height(tbl),1)); % once refered to as "Tony's trick"
Example:
%% Create a sample table
t = datetime('now');
t.Format = t.Format + ".SSSS";
x = (1:5).';
t = sort(t + seconds(5*randn(5, 1)));
tbl = timetable(t,x)
%% Change the time column
tbl.t = tbl.t(ones(height(tbl),1));
tbl
Output
tbl =
5×1 timetable
t x
_________________________ _
28-Jan-2021 11:19:16.7425 1
28-Jan-2021 11:19:23.1767 2
28-Jan-2021 11:19:27.0657 3
28-Jan-2021 11:19:27.1190 4
28-Jan-2021 11:19:38.6666 5
tbl =
5×1 timetable
t x
_________________________ _
28-Jan-2021 11:19:16.7425 1
28-Jan-2021 11:19:16.7425 2
28-Jan-2021 11:19:16.7425 3
28-Jan-2021 11:19:16.7425 4
28-Jan-2021 11:19:16.7425 5
2 Kommentare
Walter Roberson
am 29 Jan. 2021
Cast1.Var1 = datetime(Cast1.Var1, 'InputFormat', 'MM/dd/yyyy', 'Format', 'MM-dd-yyyy hh:mm:ss.SSSS') + Cast1.Var2;
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