assign name row to table

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;

[Walter Roberson]

You are trying to assign exactly two row names, but there needs to be one row name entry for each row.

You have at least 30 rows in your table, so you need at least 30 row-name entries.

[Luca Re]

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;

Answer 1

[Walter Roberson]

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.

[Luca Re]

i try

LastName = ["Sanchez";"Johnson"];

and it run correcly

if i write : LastName = {'Sanchez';'Johnson'}; it give me an error

thanks

[VBBV]

@Luca Re, use the cell array of character vectors as shown below

% use the cell array as shown below
LastName = {'Sanchez','Johnson'};
Sistemi_check.Properties.RowNames=LastName;

By default, RowNames variable refers to rows in a table. So , a ; is not needed to tell table to concatenate the names vertically. See more about RowNames property RowNames

[Walter Roberson]

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  

Answer 2

[Sulaymon Eshkabilov]

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