How to lock an enter field for an area of numbers and no letters.

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Bianca Brusis 2016-12-11

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https://ww2.mathworks.cn/matlabcentral/answers/316426-how-to-lock-an-enter-field-for-an-area-of-numbers-and-no-letters

评论： Star Strider 2016-12-12

Hello all, my question is how i can lock an area of numbers in the enter field which the user can only enter. Like i want that the user can only enter numbers in this field between for example 1-10 and only positivenumbers an no letters. Every ohter input should generate an error. :) Thank you.

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per isakson 2016-12-11

With GUIDE that feature doesn't exist. The uicontrol outputs a character string and some code is needed to convert to numerical and test the value.

In R2016a (or b) App Designer the feature exists - I think.

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Answer 1

Isabella Osetinsky-Tzidaki 2016-12-11

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https://ww2.mathworks.cn/matlabcentral/answers/316426-how-to-lock-an-enter-field-for-an-area-of-numbers-and-no-letters#answer_246792

在 MATLAB Online 中打开

if (x>10 || x<1)  
   error('User can only enter numbers between 1-10')
end

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Bianca Brusis 2016-12-12

Hi, this works nearby. I want to enter in one field only numbers between 0 and 1 and when i enter 0.1 then everythink works fine when i enter 0,1 the programmcode use it like 1 but when i enter 0,2 the error occures. Any Idea?

Bianca Brusis 2016-12-12

It seems like matlab ignores the , in the enter field.

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Answer 2

Star Strider 2016-12-11

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https://ww2.mathworks.cn/matlabcentral/answers/316426-how-to-lock-an-enter-field-for-an-area-of-numbers-and-no-letters#answer_246796

编辑：Star Strider 2016-12-12

在 MATLAB Online 中打开

EDIT — Changed to reflect different decimal separators. Now supports comma (,) and point (.) decimal separators. Checks for alphabetic inputs and for out-of-range numbers.

Try this:

nr_lims = [0 10];                                                                   % Number Limits
ltrs = sprintfc('%c', ['A':'Z' 'a':'z']);                                           % Letters Array
respcell = inputdlg(sprintf('Enter a number between %.1f and %.1f ', nr_lims));
resp = respcell{:};
if (any(ismember(resp,ltrs)))
    errordlg(sprintf('Input must be a number between %.1f and %.1f ', nr_lims),'Input Error')
    return
else
    parsenum = regexprep(resp, {'\.|\,'}, '.');                                     % Replace ‘,’ With ‘.’ In Number
    num = str2num(parsenum);                                                        % Convert String To Double
    if (num >= nr_lims(1)) && (num <= nr_lims(2))                                   % Check For Out-Of-Range
        msgbox(sprintf('Your number is %f', num), 'Success!')
    else
        errordlg(sprintf('Input must be a number between %.1f and %.1f ', nr_lims),'Input Error')
        return
    end
end