How to call one of two conditions in matlab function?

Question

Rimvydas Voveris 2021-10-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1562236-how-to-call-one-of-two-conditions-in-matlab-function

评论： Dave B 2021-10-12

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,[]));

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Answer 1

Dave B 2021-10-12

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1562236-how-to-call-one-of-two-conditions-in-matlab-function#answer_807091

编辑：Dave B 2021-10-12

在 MATLAB Online 中打开

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