How to initialize a table column to a character array?

Question

Kurt 2022-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/1867838-how-to-initialize-a-table-column-to-a-character-array

评论： Dyuman Joshi 2023-10-6

I have a table "filetext" which is 19343x46. I want to append a colum on the right containing the character array 'MET'. In other words, 19343 rows of the characters 'MET'. How do I do this? I have tried various approaches.

I created a column that is the same height as filetext:

met = [height(filetext),1];

Then I tried populating it with 'MET'

met(1:height(filetext),1) = 'MET';

but I get the error message

"Unable to perform assignment because the size of the left side is 19393-by-1 and the size of the right side is 1-by-3."

If this was a simple zero initialization I could just do:

filler = zeros(height(filetext),1);

but I don't know how to do this for characters.

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Kurt 2022-11-30

I could do all of this with a for loop, but I prefer not to.

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Answer 1

Voss 2022-11-30

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在 MATLAB Online 中打开

% a table:
filetext = table([1;2;3;4;5;6])
filetext = 6×1 table
    Var1
    ____

     1  
     2  
     3  
     4  
     5  
     6  
% append a column of all 'MET' on the right:
filetext{:,end+1} = 'MET'
filetext = 6×2 table
    Var1    Var2
    ____    ____

     1      MET 
     2      MET 
     3      MET 
     4      MET 
     5      MET 
     6      MET 