Inputdlg accept only numbers
显示 更早的评论
Beginner in MATLAB Simply program, to construct a 3x3 matrix and use inputdlg but accept only numbers Tried all answered previously can't get them to work,cant even get isnumeric to work I just want a statement saying: if (the value entered is anything other than a number) disp (please enter only numbers) else continue end but just cant seem to get this working, if i enter 'a' for example, it displays a in the matrix
回答（1 个）
Image Analyst
2013-11-19
Try this snippet:
% Ask user for a number.
defaultValue = 45.67;
titleBar = 'Enter a value';
userPrompt = 'Enter the number';
caUserInput = inputdlg(userPrompt, titleBar, 1, {num2str(defaultValue)});
if isempty(caUserInput),return,end; % Bail out if they clicked Cancel.
numericValue = str2double(cell2mat(caUserInput)); % May or may not be.
% Check for a valid number.
if isnan(numericValue)
% They didn't enter a number.
% They clicked Cancel, or entered a character, symbols, or something else not allowed.
numericValue = defaultValue;
message = sprintf('I said it had to be an integer.\nI will use %f and continue.', numericValue);
uiwait(warndlg(message));
end
2 个评论
Rob
2013-11-19
Image Analyst
2013-11-19
No, but you can attach it here and people may look at it.
类别
在 帮助中心 和 File Exchange 中查找有关 Cell Arrays 的更多信息
2013-11-19
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
