Add lines to a struct

I have a struct where one of the columns is the PatientID that appears like this 'P00000001' and I want to add more patients with a diferent PacientID but with the same structer ('P00000001' - a string with P and 8 numbers) how do I do?

[Matt J]

structs do not have "columns". Are you sure you don't mean a table?

[Stephen23]

"structs do not have "columns""

This structure has three columns:

S = struct('A',{1,2,3;4,5,6})

S = 2×3 struct array with fields:
    A

size(S,2)

ans = 3

Answer 1

[Adam Danz]

s = struct(); 
s.(sprintf('P%08.0f',1)) = 'Baetriz';
s.(sprintf('P%08.0f',2)) = 'Adam';
s.(sprintf('P%08.0f',3)) = 'Matlab'

s = struct with fields:
    P00000001: 'Baetriz'
    P00000002: 'Adam'
    P00000003: 'Matlab'

Or if you're refering to tables,

T = table(); 
T.(sprintf('P%08.0f',1)) = 'Baetriz';
T.(sprintf('P%08.0f',2)) = 'Adam';
T.(sprintf('P%08.0f',3)) = 'Matlab'

T = 1×3 table
    P00000001    P00000002    P00000003
    _________    _________    _________

     Baetriz       Adam        Matlab  

[Steven Lord]

If you're using a table you probably want each patient to be a row of data, with the IDs as the RowNames.

t = table("Baetriz", 'VariableNames', "Name", 'RowNames', "P00000001")

t = table
                   Name   
                 _________

    P00000001    "Baetriz"

t{sprintf("P%08d", 2), 'Name'} = "Steve"

t = 2×1 table
                   Name   
                 _________

    P00000001    "Baetriz"
    P00000002    "Steve"  

n = t{'P00000001', 'Name'}

n = "Baetriz"

[Adam Danz]

Or if you want to add row names all at once,

names = ["Baetriz";"Steve";"Adam"]

names = 3×1 string array
    "Baetriz"
    "Steve"
    "Adam"

rownames = compose('P%08d',1:numel(names))

rownames = 1×3 cell array
    {'P00000001'}    {'P00000002'}    {'P00000003'}

T = table(names, 'RowNames', rownames)

T = 3×1 table
                   names  
                 _________

    P00000001    "Baetriz"
    P00000002    "Steve"  
    P00000003    "Adam"