How to call one of two conditions in matlab function?

Hello, I want to ask how to call a condition x without condition b,because if i write a number array in my function it shows me condition b (it changes number array to vector column),but I want to get two different conditions,one of them would be x (it change number array o vector line) and b,but in my case if I write [x]=eilstulp([2 5 6 7]) I'm still getting b condition. So how to get codition b and second time get condition x without condition b?

My code:

function [b,x]=eilstulp(A)
%Eilstulp function which change number array to vector column or vector
%line
%[b,x]=eilstulp(A)
%b,x - output,
%b - Vector column rezult,
%x - Vector line rezult,
b=A';
b(:);
x=num2str(reshape(A',1,[]));

Answer 1

[Dave B]

When you call a function with one output MATLAB will return the first output, the names specified for outputs when calling it are irrlevant. You can use a ~ to ignore an argument.

If you really wanted this style of function return arguments (i.e. return both always, specified by name), you could get close to it by returning a struct with fieldnames corresponding the the two outputs (see example below)

A = 1:10;
[col,rowstr]=eilstulp(A)

col = 10×1

1 2 3 4 5 6 7 8 9 10

rowstr = '1   2   3   4   5   6   7   8   9  10'

[~,rowstr]=eilstulp(A)

rowstr = '1   2   3   4   5   6   7   8   9  10'

res = eilstulp2(A);
res.b

ans = 10×1

1 2 3 4 5 6 7 8 9 10

res.x

ans = '1   2   3   4   5   6   7   8   9  10'

function [b,x]=eilstulp(A)
%Eilstulp function which change number array to vector column or vector
%line
%[b,x]=eilstulp(A)
%b,x - output,
%b - Vector column rezult,
%x - Vector line rezult,
b=A';
b(:);
x=num2str(reshape(A',1,[]));
end

function res=eilstulp2(A)
res.b=A(:);
res.x=num2str(reshape(A',1,[]));
end

[Rimvydas Voveris]

Maybe now I'm too tired or I don't get the point of this,because this also shows me both b and x at the same time. I want to call only x or only b when I want. And in A im always writing random arrays and its not a const. Sry if I'm not smart ,but probably this example is not what I'm looking for or maybe I don't know what to write in command Window.

%Command window
eilstulp([1 2 3 4])
%output
ans = 

  struct with fields:

    b: [4×1 double]
    x: '1  2  3  4'
%but I can't use res.b or res.x because matlab shows me an error,that you
%can not use dot in code 

[Stephen23]

"maybe I don't know what to write in command Window."

eilstulp(..) % what you wrote (does not work, does not assign the output)
res = eilstulp2(A); % what Dave B wrote (works, assigns the output variable)
res.b % because then you can do this.

The simplest and most efficient solution is just to use the tilde.

[Rimvydas Voveris]

Thank you guys, you saved my life I'm not a programer and this is hard for me to always get the point,sry for my misunderstanding at the begining.

[Dave B]

No need to apologise, we're here to help!