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How to limit input formats in an edit text box?

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Ozan Oguz
Ozan Oguz on 26 Jun 2013
In my GUI (programmatic one) there is an edittext box, used to enter coeeficients.
I need to check the format of input and allow only to these types:
5
0.5
1.6
5.9
0.4565132
5.0000
00000.5
Then I'll save them and call back.

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Accepted Answer

Tom
Tom on 26 Jun 2013
STR2DOUBLE catches most of those things and outputs NaN if the number isn't valid. The only thing is that it will handle commas. I used REGEXPREP to switch any commas with asterisks so str2double can't process it.
validStr = {'5'
'0,5'
'1.0.6'
'5.9'
'0.4565132'
'5.0000'
'00000.5'};
validStr = regexprep(validStr,',','****');
str2double(validStr)

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Ozan Oguz
Ozan Oguz on 27 Jun 2013
This seems to work fine. Thank you!

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More Answers (2)

Tom
Tom on 26 Jun 2013
validStr = {'5'
'0.5'
'1.6'
'5.9'
'0.4565132'
'5.0000'
'00000.5'};
if any(strcmp(get(hEditBox,'String'),validStr))
%code
else
warndlg('Edit box string is not valid.')
end

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Ozan Oguz
Ozan Oguz on 26 Jun 2013
Ok. I guess I cant explain it correctly.
It is like this:
There is a box to enter a coefficient (this can be any real number, and only one of it)
We can't use letters, comma or any other character (except numbers and a single dot, as in 0.04415 or 30.8)
Coefficient can be any real number in the correct format: Just numbers and only a single dot for decimals, if needed.
Thx.

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Sean de Wolski
Sean de Wolski on 26 Jun 2013
Why not just use a popupmenu?
uicontrol('style','popupmenu','string',{'0.5','3.14','1.6'})

  1 Comment

Ozan Oguz
Ozan Oguz on 26 Jun 2013
Ok. I guess I cant explain it correctly.
It is like this:
There is a box to enter a coefficient (this can be any real number, and only one of it)
We can't use letters, comma or any other character (except numbers and a single dot, as in 0.04415 or 30.8)
Coefficient can be any real number in the correct format: Just numbers and only a single dot for decimals, if needed.
Thx.

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