Reshape data the first row becomes the different columns

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Luca
Luca 2023-10-23
评论： Luca 2023-10-23
Hi, I would like to reshape my data set, that includes different stocks i a year and is in the form of a table. Currently it look like this:
ID Date return
1 01.01.2015 0
1 02.01.2015 0.5
1 03.01.2015 -0.3
. . .
. . .
. . .
2 01.01.2015 0
2 02.01.2015 0.2
2 03.01.2015 0.5
. . .
. . .
. . .
The goal would be to have date colum as fist colum and every ID is a separate column. where every row shows returns for every stock in a specific day.
Date ID1 ID2 ID3 ...
01.01.2015 0 0 0
.
.
.
31.12.2015 0.2 0.1 0.5
Thank you for your help.

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采纳的回答

Stephen23
Stephen23 2023-10-23
Ran in:
ID = [1;1;1;2;2;2];
Date = datetime(2015,1,[1;2;3;1;2;3]);
vals = [0;0.5;-0.3;0;0.2;0.5];
T = table(ID,Date,vals)
T = 6×3 table
ID Date vals __ ___________ ____ 1 01-Jan-2015 0 1 02-Jan-2015 0.5 1 03-Jan-2015 -0.3 2 01-Jan-2015 0 2 02-Jan-2015 0.2 2 03-Jan-2015 0.5
U = unstack(T,'vals','ID', 'VariableNamingRule','preserve')
U = 3×3 table
Date 1 2 ___________ ____ ___ 01-Jan-2015 0 0 02-Jan-2015 0.5 0.2 03-Jan-2015 -0.3 0.5

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