Inputdlg accept only numbers

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

Answer 1

[Image Analyst]

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

[Rob]

can i email you my code to have a look at it? please!

[Image Analyst]

No, but you can attach it here and people may look at it.