MATLAB: Check for valid data in edit box, clear the edit box if the data is invalid

matlab gui

Hello ,

I am working on MATLAB GUI using guide. I have an edit box which takes the input(Range : 1 to 100) from the user. When i enter the data in the edit box as 200, before saving the data i want to check whether the entered number lies within the specified range.If the entered number is not within the specified range then i want to display a message that

"The entered number is not a valid number" and then clear the edit box to enter the new number.

I am using the errordlg() function to display the error message. But i am not able clear the edit box and re-enter the new valid number .

It would be grateful if you let me know how this is done.

Looking forward to hear from you.

Thanks

Pankaja

Best Answer

set(hObject, 'String', '')

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MATLAB: GUIDE editable box, Excel to Matlab Column conversion

Tessa - if you assume that the Excel columns contain alphabetic characters in the set {A,B,C,...,Z}, then you can try using the following conversion

 function [matCol] = exceToMatlab(excelCol)
 numChars = length(excelCol);
 matCol = 0;
 for k=1:length(excelCol)
    % convert the character to an integer: A->1, B->2, etc.
    charAsInt = int64(upper(excelCol(k))) - 64;  
    % add to our running total
    matCol = matCol + charAsInt * (26 ^ (numChars - k));
 end

In the above, we assume that each character can be mapped to the integers 1 through 26, and then, depending upon which position the character is in, we multiply it by 26 to the exponent of that character position less one. So,

 A  --> 1 * 26 ^ (1 - 1) = 1 * 26^0 = 1
 B  --> 2 * 26 ^ (1 - 1) = 2 * 26^0 = 2
 ...
 Z  --> 26 * 26 ^ (1 - 1) = 26 * 26^0 = 26
 AA --> 1 * 26 ^ (2 - 1) + 1 * 26 ^ (2 - 2) = 1 * 26^1 +  1 * 26^0 = 27
 AB --> 1 * 26 ^ (2 - 1) + 2 * 26 ^ (2 - 2) = 1 * 26^1 +  2 * 26^0 = 28
 etc.

Try the above and see what happens!

MATLAB: Getting a variable from an Edit box, using a push button.

It will not go to your workspace directly. To save the value to the workspace do this:

age = str2double(get(handles.AgeEdit , 'String'));
assignin('base','age',age);

Then you go to the workspace and use the age variable.

Best Answer

Related Solutions

MATLAB: GUIDE editable box, Excel to Matlab Column conversion

MATLAB: Getting a variable from an Edit box, using a push button.

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