How to display unique error message in function code?

1 次查看（过去 30 天）
Anne Nguyen
Anne Nguyen 2019-10-4
回答： Daniel M 2019-10-5
Here is my code:
function returnVec = repvec(vec, s)
returnVec = [];
i = 1;
for x = vec
for y = 1:s
returnVec(i) = x;
i = i+1;
end
end
end
For example, in the command window when I put in repvec([1,2;3,4],2), I get an error message. This is what I wanted to happen and is supposed to occur. However, how do I create my own unique error message such as "The first input argument is invalid!" if any input arguments are incorrect? (This is so that others who use my code can know why they received an error.) I have to use the error function.
  1 个评论
dpb
dpb 2019-10-5
What specific is the problem with following an example as shown in the documentation for the error() function? It has examples for the exact purpose.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Daniel M
Daniel M 2019-10-5
You need to manually check the input arguments yourself. For example:
function returnVec = repvec(vec, s)
if ~isvector(vec)
error('vec must be a vector.')
end
returnVec = [];
i = 1;
for x = vec
for y = 1:s
returnVec(i) = x;
i = i+1;
end
end
end

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by