Using InputParse for boolean field

[elgen]

I am trying to add a flag called "debug" as an optional input parameter
to the function. The test function is listed below:

function untitled(a, varargin)
p = inputParser;
p.addRequired('a', @isnumeric);
p.addOptional('debug', 0, @(x)strcmpi(x, 'debug'));
p.parse(a, varargin{:})
disp(p.Results)

If i type

>> untitled(3)

a: 3
debug: 0

If i type

>> untitled(3, 'debug')

a: 3
debug: 'debug'

I want Matlab to place 1 in the debug field, i.e.

>> untitled(3, 'debug')

a: 3
debug: 1

Is it possible? Do I need to play with the anonymous function handle?
FYI, matlab doc says that if the Boolean output is true, then MATLAB
accepts the input value. I want to work around this.

Thank you.

[Loren Shure]

"elgen" <ske...@no.spam.hotmail.com> wrote in message
news:i58kar$hru$1...@news.eternal-september.org...

I think you're validator is checking for the string debug rather than
validating its value.

--
Loren
http://blogs.mathworks.com/loren/
http://matlabwiki.mathworks.com/MATLAB_FAQ

[rmc256]

I'd like to revive this thread, as I don't understand if the original question is possible or not.
Can I make an optional input to the inputParser (addOptional) that will return a 1 if the string is present in the function call, or a 0 if not? If so how? It seems Matlab will always take the string itself to be the value. I would have to pass a 1, but that's not very clear syntax.
If there is not a way to do this, I could do it as a parameter value pair (i.e. untitled(3,'debug',1) ). Seems unnecessary.

Michael

"Loren Shure" <loren...@mathworks.com> wrote in message <i5g4tb$j6p$1...@fred.mathworks.com>...

[Maria]

"rmc256" wrote in message <itfosc$phe$1...@newscl01ah.mathworks.com>...

If you want 'debug' to be a boolean variable, why not do this:

function untitled(a, varargin)
p = inputParser;
p.addRequired('a', @isnumeric);

p.addParamValue('debug',false,@islogical);
p.parse(a, varargin{:})
disp(p.Results)

Then

>> untitled(3)
a: 3
debug: 0

>> untitled(3,'debug',true)
a: 3
debug: 1