Can I add units to the table?

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Diego Guarachi
Diego Guarachi 2019-5-17
编辑： dpb 2024-7-29
Can I add units to the variables in the table? I have searched for information and I could not find anything, it can only be done in numbers ...please help
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Walter Roberson
Walter Roberson 2024-7-28
@Paul
The units are shown with summary () -- but that is about the limit
Paul
Paul 2024-7-28
编辑：dpb 2024-7-29
Ran in:
Sure, enough. They don't even get checked when co[n]catenating tables.
T1 = table([1;2;3],'VariableNames',{'x'}); T1.Properties.VariableUnits = {'sec'};
T2 = table(2*[1;2;3],'VariableNames',{'x'}); T2.Properties.VariableUnits = {'m'};
summary([T1;T2])
Variables: x: 6x1 double Properties: Units: sec Values: Min 1 Median 2.5 Max 6
summary([T2;T1])
Variables: x: 6x1 double Properties: Units: m Values: Min 1 Median 2.5 Max 6

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回答（2 个）

Raj
Raj 2019-5-17
"Can I add units to the variables in the table?" Yes you can. You can specify units for each variable in the table by modifying the table property,
% |VariableUnits|.
Specify the variable units as a cell array of character vectors.
Something like this:
table (W,T,Pe,P)
T.Properties.VariableUnits = {'Rad/S','NM','N','N'}; % what I could make out from your picture. Please correct if wrong.
Or Do you want the units to get displayed on your table? Please be clear.
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Walter Roberson
Walter Roberson 2020-12-15
table() are not designed for presentation purposes. Report Generator has facilities for better output of tables.
That said, it would seem to me to be a small thing to add the units or the Variable Description information (which might be the original names of the variables.) It could even be made into properties as to whether to display them or not. I don't know why Mathworks has not done this.
table() could also benefit from a per-variable format specification... among other things.
dpb
dpb 2024-7-28
Ran in:
t=array2table([[0:2].',rand(3,1)],'VariableNames',{'Time','Velocity'});
t.Properties.VariableUnits={'sec','mph'}
t = 3x2 table
Time Velocity ____ ________ 0 0.011763 1 0.85573 2 0.24784
Indeed to all...there's already room for them with a blank line just waiting to be used for something besides wasted white space.

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KSSV
KSSV 2019-5-17
It is not allowed...may be you can use something like this:
varNames = {'Name', 'Age_in_Years'} ;
varTypes = {'string','double'};
s = {'Tom' ; 'Dick' ; 'Hary'} ;
a = [20 ;21; 24] ;
T = table(s,a) ;
T.Properties.VariableNames = varNames

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