How to create a table from strings and numerical data?

I have a loop and I don't know how many times it runs. Through this loop I get a string from my data and a vector with let's say 10 numbers.

what I'm trying to do is to create an empty table that after each run of loop adds string and the vector like this:

for i=1:length(endLoop)
    str = get_my_string;     % this returns a string that I was talking about earlier,let's say 'hello'
    vec = get_my_vector   % this gets me the vector mentioned earlier, let's say [1 2 3 4 5 6 7 8 9 10]

Now I need to concatenate my string and vector to get something like this:

[str vec] like ['hello' 1 2 3 4 5 6 7 8 9 10];

Then I need to write this into a table as a row. How can I do that?

Also I don't know the number of n or m, and I don't want to preallocate anything as the sizes are unknown. I wanna start with an empty table and then after first iteration I write the first line of the table, second iteration second line is written, and so on.

Thank you all for your help.

Answer 1

[Walter Roberson]

Provided that you already initialized YourTable with variable type string for the first variable and cell for the second variable,

YourTable(end+1,:) = {str {vec}};

[Walter Roberson]

For example,

YourTable = table('Size', [0 2], 'VariableNames', {'str', 'vec'}, 'VariableTypes', {'cellstr', 'cell'});

Letters = 'a':'z';

for K = 1 : 7
    str = Letters(randi(26, 1, 5));
    vec = randi(10, 1, 4);
    YourTable(end+1,:) = {str, {vec}};
end

YourTable

YourTable = 7×2 table
       str            vec     
    _________    _____________

    {'ucvqj'}    {[  1 9 6 4]}
    {'ugrft'}    {[  4 1 5 6]}
    {'rjuoy'}    {[  5 1 6 8]}
    {'ylkpo'}    {[10 8 10 9]}
    {'qqmwx'}    {[  2 6 3 8]}
    {'nwlzh'}    {[  6 4 2 3]}
    {'pqdwu'}    {[  5 3 3 3]}

[Walter Roberson]

This assumes that you want a variable that is the entire vector of numbers, rather than wanting individual variables for each of the numbers in the vector.

Answer 2

[Stephen23]

" I don't want to preallocate anything as the sizes are unknown. I wanna start with an empty table and then after first iteration I write the first line of the table, second iteration second line is written, and so on."

So lets take the two things we do know: the text and the numeric vector, and place each of them into one column of the table:

T = table('Size',[0,2], 'VariableTypes',{'string','cell'}, 'VariableNames',{'txt','vec'})

T =

  0×2 empty table

W = warning('off','MATLAB:table:RowsAddedExistingVars');
for k = 1:randi(9)
    S = string(char(randi([65,90],1,5))); % random text
    V = randi(9,1,randi(9)); % random numeric vector of random size
    T.txt(k) = S;
    T.vec{k} = V;
end
warning(W)
T

T = 7×2 table
      txt              vec        
    _______    ___________________

    "NUDBP"    {[  9 1 7 6 4 2 7]}
    "ULVLA"    {[          6 2 3]}
    "MJHNE"    {[6 1 2 6 7 5 1 6]}
    "FAXND"    {[            1 9]}
    "IRTRR"    {[              1]}
    "HRUQB"    {[          3 8 2]}
    "RAOZX"    {[        1 1 5 3]}