Signal labeler does not import timetable from workspace

I have a timetable with three variables

When I click import from workspace, it's empty it does not show the time tables.

How can I use timetables with the signal labeler app?

I couldn't find any restriction on the documentation. According to the documentation timetables are supported

Answer 1

[Ganesh]

Hi @Gustavo Ramirez,

I understand that you are trying to import a "Timetable" data into the Signal Labeler, but you are unable to do so.

The reason you are encountering the issue is that, the time format you are using is a "DateTime" type. Signal Labeler app allows you to import "Timetable" data that is defined by a Timeseries. To give you better understanding, you can try creating the following type of "Timetable" which will allow your data to be imported by Signal Labeler app.

ts1 = timeseries(rand(5,1),[0 10 20 30 40],"Name","Series_1");
ts2 = timeseries(rand(5,1),[0 10 20 30 40],"Name","Series_2");
ts3 = timeseries(rand(5,1),[0 10 20 30 40],"Name","Series_3");
TT = timeseries2timetable(ts1,ts2,ts3)

When you open "TT", you can notice that the "Time" data is defined by seconds and not by a "DateTime" value.

In your case, you can modify your "Time" data to represent a timeseries. Kindly refer to the following documentation to know more about the "timeseries() function":

https://in.mathworks.com/help/matlab/ref/timeseries.html

Hope this helps!

Answer 2

[Strider]

While working in 2024b I encountered a similar issue. I was able to import my timetable after using retime to a uniform time step. The time variable must also be duration and not datetime.

% assuming TT is not regular
t = seconds( (1:100)' + rand([100 1]));
TT1 = timetable(rand([100,1]),'RowTimes',t);
isregular(TT1) % cannot import

ans = logical
   0

TT = retime(TT1,'regular', 'linear', 'SampleRate', 400); % 400hz
isregular(TT) % can import

ans = logical
   1