MATLAB: How to loop until the user types a specific word?

8 次查看（过去 30 天）
Ame Michael
Ame Michael 2018-4-25
评论： Stephen23 2018-4-25
Say I want to repeatedly ask a user what their favourite color is. I want to keep looping this statement, and have the user type their favorite color in. But, I want to exit this loop when the user types the word, "quit." How can I achieve this?
I have been looking at using while loops, but it says the matrix dimensions do not agree. Any help would be greatly appreciated. Thank you.
  1 个评论
Stephen23
Stephen23 2018-4-25

Use strcmp to test if words match or not:

str = '';
while ~strcmp(str,'quit')
    ...
    str = input('...','s');
end

Do not use == for testing if char vectors are the same: == performs an element-wise comparison, so just like any other element-wise operation both inputs must be the same size or one of them a scalar. In any case, using strcmp is the correct tool for the job.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Sigurd Askeland
Sigurd Askeland 2018-4-25
This code should do the trick:
response = '';
counter = 1;
%While loop runs until the string comparison finds
%that the response is equal to 'quit'.
while(~strcmp(response, 'quit'))
response = input('What is your favorite color? (type quit to exit) ', 's');
favorite_colors{counter} = response
counter = counter + 1;
end
%Remove quit.
favorite_colors = favorite_colors(1:end - 1)
disp 'Thank you!'

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by