add a vector as a timetable element

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giacomo labbri
giacomo labbri 2020-12-8
评论： giacomo labbri 2020-12-9
Hi,
I would like to write the column of a matrix as element of a timetable (meaning a column for each time). in this timetable I have other variables that have a scalar value at each time. Any suggestion on how to do it?
Cheers,
Giacomo

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Cris LaPierre
Cris LaPierre 2020-12-8
编辑：Cris LaPierre 2020-12-8
Ran in:
A column for each time? Do you mean row?
Just add it as a new variable in your timetable. Each column is typically a separate variable.
indoors = readtimetable('indoors.csv')
indoors = 60x2 timetable
Time Humidity AirQuality ___________________ ________ __________ 2015-11-15 00:00:24 36 80 2015-11-15 01:13:35 36 80 2015-11-15 02:26:47 37 79 2015-11-15 03:39:59 37 82 2015-11-15 04:53:11 36 80 2015-11-15 06:06:23 36 80 2015-11-15 07:19:35 36 80 2015-11-15 08:32:47 37 80 2015-11-15 09:45:59 37 79 2015-11-15 10:59:11 36 80 2015-11-15 12:12:23 37 80 2015-11-15 13:25:35 37 79 2015-11-15 14:38:46 36 83 2015-11-15 15:51:58 37 80 2015-11-15 17:05:10 36 80 2015-11-15 18:18:22 37 80
% Create temperatures
tempF = randi(100,[height(indoors),1]);
% Add vector of temperatures to timetable
indoors.Temp = tempF
indoors = 60x3 timetable
Time Humidity AirQuality Temp ___________________ ________ __________ ____ 2015-11-15 00:00:24 36 80 75 2015-11-15 01:13:35 36 80 17 2015-11-15 02:26:47 37 79 6 2015-11-15 03:39:59 37 82 92 2015-11-15 04:53:11 36 80 74 2015-11-15 06:06:23 36 80 98 2015-11-15 07:19:35 36 80 72 2015-11-15 08:32:47 37 80 65 2015-11-15 09:45:59 37 79 1 2015-11-15 10:59:11 36 80 84 2015-11-15 12:12:23 37 80 45 2015-11-15 13:25:35 37 79 23 2015-11-15 14:38:46 36 83 65 2015-11-15 15:51:58 37 80 5 2015-11-15 17:05:10 36 80 46 2015-11-15 18:18:22 37 80 10
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Cris LaPierre
Cris LaPierre 2020-12-9
Ran in:
Still not a problem. Can we assume the times in your timtable rows align with the times of your matrix colums?
Updating the example slightly.
% Creating a 60x2 timetable
indoors = readtimetable('indoors.csv');
% Creating a matrix with 4 heights x 60 times (reduced for visual purposes only)
tempF = randi(100,[4,60]);
% Add temps to timetable under a variable Temp
% Transopose tempF so that rows are times, and columns are heights
indoors.Temp = tempF'
indoors = 60x3 timetable
Time Humidity AirQuality Temp ___________________ ________ __________ _______________________ 2015-11-15 00:00:24 36 80 4 16 47 59 2015-11-15 01:13:35 36 80 23 3 13 91 2015-11-15 02:26:47 37 79 76 34 90 13 2015-11-15 03:39:59 37 82 76 24 12 41 2015-11-15 04:53:11 36 80 92 76 25 39 2015-11-15 06:06:23 36 80 67 85 37 63 2015-11-15 07:19:35 36 80 20 4 29 68 2015-11-15 08:32:47 37 80 41 60 98 99 2015-11-15 09:45:59 37 79 64 48 15 14 2015-11-15 10:59:11 36 80 56 26 100 31 2015-11-15 12:12:23 37 80 67 74 55 74 2015-11-15 13:25:35 37 79 57 2 46 16 2015-11-15 14:38:46 36 83 84 54 16 35 2015-11-15 15:51:58 37 80 87 21 12 23 2015-11-15 17:05:10 36 80 61 73 34 78 2015-11-15 18:18:22 37 80 69 81 66 73
If you want each height to be its own variable, you can use the splitvars function.
indoors = splitvars(indoors,'Temp','NewVariableNames',["H1" "H2" "H3" "H4"])
indoors = 60x6 timetable
Time Humidity AirQuality H1 H2 H3 H4 ___________________ ________ __________ __ __ ___ __ 2015-11-15 00:00:24 36 80 4 16 47 59 2015-11-15 01:13:35 36 80 23 3 13 91 2015-11-15 02:26:47 37 79 76 34 90 13 2015-11-15 03:39:59 37 82 76 24 12 41 2015-11-15 04:53:11 36 80 92 76 25 39 2015-11-15 06:06:23 36 80 67 85 37 63 2015-11-15 07:19:35 36 80 20 4 29 68 2015-11-15 08:32:47 37 80 41 60 98 99 2015-11-15 09:45:59 37 79 64 48 15 14 2015-11-15 10:59:11 36 80 56 26 100 31 2015-11-15 12:12:23 37 80 67 74 55 74 2015-11-15 13:25:35 37 79 57 2 46 16 2015-11-15 14:38:46 36 83 84 54 16 35 2015-11-15 15:51:58 37 80 87 21 12 23 2015-11-15 17:05:10 36 80 61 73 34 78 2015-11-15 18:18:22 37 80 69 81 66 73
If you need help in accessing your data in the table, see this documentation page.

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