How to limit input formats in an edit text box?

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.

Answer 1

[Tom]

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)

[Ozan Oguz]

This seems to work fine. Thank you!

Answer 2

[Tom]

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

[Ozan Oguz]

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.

Answer 3

[Sean de Wolski]

Why not just use a popupmenu?

uicontrol('style','popupmenu','string',{'0.5','3.14','1.6'})

[Ozan Oguz]

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.