Using strjoin to put as a variable name in a table

Hi, my main question is: how to concatenate 2 input strings, turn it into a single string, and put it as a variable name in a table?

I'm trying to make the input of the independent variable (vi) stay together with the units(vi_u) when the table appears,

for example: time_s

and the same for the independent variable

I created isolated strings, then joined them as a single string, to achieve my goal, but I get this error:

%Error using array2table
%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.

%table = array2table(a,'VariableNames', {string(strjoin(tabc1,"_")),string(strjoin(tabc2,"_"))});

This is my code:

vd=input(['Indicate the name of the quantity corresponding to the variable ' ...
     'dependents');
d1= sprintf('Indicate the units of the variable %s: ',vd);
vd_u=input(d1,'s');
tabc2= {vd vd_u};
tab_c2=string(strjoin(tabc2,"_"));

clc
table = array2table(a,'VariableNames', {tab_c1,tab_c2});
disp(table)

Answer 1

[Steven Lord]

Specify VariableNames as either a cell array containing char vectors or as a string array. Don't specify them as a cell array containing string scalars.

A = magic(3);
N = {'var1', 'var2', 'var3'};
A1 = array2table(A, VariableNames=N) % cell array of char vectors

A1 = 3×3 table
    var1    var2    var3
    ____    ____    ____

     8       1       6  
     3       5       7  
     4       9       2  

A2 = array2table(A, VariableNames=string(N)) % string array

A2 = 3×3 table
    var1    var2    var3
    ____    ____    ____

     8       1       6  
     3       5       7  
     4       9       2  

N2 = cellfun(@string, N, UniformOutput=false)

N2 = 1×3 cell array
    {["var1"]}    {["var2"]}    {["var3"]}

A3 = array2table(A, VariableNames=N2) % cell array of string scalars

Error using array2table
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.

[Madalena Francisco]

Ohhh thank thank! But I already create another version of my code and it´s working!! I convert the strjoin to chars using convertStringsToChars

But thanks a lot anyways! And yes yes it´s so important what you said thank uu