assign name row to table

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Luca Re
Luca Re on 31 May 2023
Commented: Walter Roberson on 1 Jun 2023
Sistemi_check=table(string(K_Nome),K_idxInstrument');
LastName = {"Sanchez";"Johnson"};
Sistemi_check.Properties.RowNames=LastName;
>> check_Instrument
Error using .
The RowNames property must be a string array or a cell array, with each name containing one or more
characters.
Error in check_Instrument (line 22)
Sistemi_check.Properties.RowNames=LastName;
  2 Comments
Luca Re
Luca Re on 31 May 2023
Edited: Walter Roberson on 1 Jun 2023
ok i want to rename columns in a table..is correct to use VariableNames? i try it but i get an error
Sistemi_check=table(string(K_Nome),K_idxInstrument');
LastName = {"Sanchez";"Johnson"};
Sistemi_check.Properties.VariableNames=LastName;
Error using .
The VariableNames property is a cell array of character vectors. To assign multiple variable names,
specify nonempty names in a string array or a cell array of character vectors.
Error in check_Instrument (line 22)
Sistemi_check.Properties.VariableNames=LastName;

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Answers (2)

Walter Roberson
Walter Roberson on 31 May 2023
Either use
LastName = ["Sanchez";"Johnson"];
Sistemi_check.Properties.RowNames=LastName;
or else
LastName = {'Sanchez';'Johnson'};
Sistemi_check.Properties.RowNames=LastName;
That is you can use a cell array of character vectors, or you can use a string() array, but you cannot use a cell array of string() objects.
  3 Comments
Walter Roberson
Walter Roberson on 1 Jun 2023
Sistemi_check = table("first", 123)
Sistemi_check = 1×2 table
Var1 Var2 _______ ____ "first" 123
LastName = ["Sanchez";"Johnson"];
Sistemi_check.Properties.VariableNames=LastName
Sistemi_check = 1×2 table
Sanchez Johnson _______ _______ "first" 123
Sistemi_check = table("first", 123)
Sistemi_check = 1×2 table
Var1 Var2 _______ ____ "first" 123
LastName = {'Sanchez';'Johnson'};
Sistemi_check.Properties.VariableNames=LastName
Sistemi_check = 1×2 table
Sanchez Johnson _______ _______ "first" 123

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Sulaymon Eshkabilov
Sulaymon Eshkabilov on 31 May 2023
Here is a plain example how to rename row and column names in a table array:
t1 = date;
t2 = '01-June-2023';
t3 = '10-June-2023';
t4 = '20-June-2023';
T = {t1; t2; t3;t4};
D = table(T);
D.N = [10:10:40]'
D = 4×2 table
T N ________________ __ {'31-May-2023' } 10 {'01-June-2023'} 20 {'10-June-2023'} 30 {'20-June-2023'} 40
% Add row names:
LastName = {'Sanchez';'Johnson'; 'Brown'; 'Green'};
D.Properties.RowNames=LastName
D = 4×2 table
T N ________________ __ Sanchez {'31-May-2023' } 10 Johnson {'01-June-2023'} 20 Brown {'10-June-2023'} 30 Green {'20-June-2023'} 40
% Change column names:
Col_Name = {'Date', 'Number'};
D=renamevars(D,{'T', 'N'}, Col_Name)
D = 4×2 table
Date Number ________________ ______ Sanchez {'31-May-2023' } 10 Johnson {'01-June-2023'} 20 Brown {'10-June-2023'} 30 Green {'20-June-2023'} 40

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