Matrix Input Validation Help

2020 7 27
1 个回答
回答已采纳
更新时间：2020 7 27
2 次查看（30 天）

0 个投票

Hello,
I am trying to validate a user input as numeric while forcing the user to repeat if it is not. I currently have this working well as long as the user does not input a letter that is non numeric. I would like it to prompt the user again if they input a string instead of a number. Any help is appreciated.
Thanks
my input looks like
array(r, c) = str2num(input(['Digit for position ', num2str(c), ': '], 's'));
while array(r, c) > 6 || array(r, c) < 0
GUESS(r, c) = str2num(input(['Digit for position ', num2str(cc), ': '], 's'));
end

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2020-7-27
编辑：Walter Roberson 2020-7-27

0 个投票

array(r, c) = str2double(input(['Digit for position ', num2str(c), ': '], 's'));
while isnan(array(r,c)) || array(r,c) ~= fix(array(r,c)) || array(r, c) < 0 || array(r, c) > 6
array(r, c) = str2double(input(['Digit for position ', num2str(cc), ': '], 's'));
end
or
array(r, c) = str2double(input(['Digit for position ', num2str(c), ': '], 's'));
while ~ismember(array(r,c), 0:6)
array(r, c) = str2double(input(['Digit for position ', num2str(cc), ': '], 's'));
end

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Scott Tobin
Scott Tobin 2020-7-27
Okay, thank you.
However, I know have the issue of it interpreting the input as a string. Inputing 'w' yields unrecognized funciton or variable 'w'
Scott Tobin
Scott Tobin 2020-7-27
Actually that was on me with a typo but I do have...
Unable to perform assignment because the size of the left side is 1-by-1 and the size
of the right side is 0-by-0 for the array in the loop
Scott Tobin
Scott Tobin 2020-7-27
Ope spotted was supposed to be str2double not str2num in the second. Appreciate the help I haven't seen it done in that manner before thanks for the tip

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Characters and Strings 的更多信息

产品

标签

Community Treasure Hunt

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

Start Hunting!

Translated by