Creating a table with only headers

Question

Sebastian Daneli 2021-11-15

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https://ww2.mathworks.cn/matlabcentral/answers/1587254-creating-a-table-with-only-headers

评论： Star Strider 2021-11-16

I would like to create an empty table with the headers 'Observations', 'Mean', 'Treatment' and 'Residual'. I would also like the predetermine the amount of data to fit in the table, i.e., if I have two 2 sets, the table should allow for 2*4 inputs.

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Answer 1

Adam Danz 2021-11-15

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To create an emtpy table with 4 headers,

T = array2table(nan(0,4), 'VariableNames', {'Observations', 'Mean', 'Treatment', 'Residual'})

T = 0×4 empty table

To create 2x4 table of numeric values,

T = array2table(nan(2,4), 'VariableNames', {'Observations', 'Mean', 'Treatment', 'Residual'})
T = 2×4 table
    Observations    Mean    Treatment    Residual
    ____________    ____    _________    ________

        NaN         NaN        NaN         NaN   
        NaN         NaN        NaN         NaN   

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Sebastian Daneli 2021-11-15

@Adam Danz, turns out I missunderstood the purpose of tables. If i wan't to do the same thing but for cells?

Adam Danz 2021-11-15

You can't add header names for cells but to preallocate the cells in the same way I've shown for tables,

C = cell(0,4)

or

c = cell(2,4)

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Answer 2

Seth Furman 2021-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/1587254-creating-a-table-with-only-headers#answer_833079

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table has a preallocation syntax:

table('Size', [2 4], 'VariableNames', ["Observations", "Mean", "Treatment", "Residual"], 'VariableTypes', repmat("double", 1, 4))
ans = 2×4 table
    Observations    Mean    Treatment    Residual
    ____________    ____    _________    ________

         0           0          0           0    
         0           0          0           0    