Matlab: Turning try/catch on and off for debugging

I am using a try-catch statement for a lengthy calcuation similar to the following:

for i=1:1000
    try 
        %do a lot of stuff
    catch me
        sendmail('foo@bar.bz', 'Error in Matlab', parse_to_string(me));
    end
end

When I am writing on my code I do not want to jump in the catch statement because I like Matlabs dbstop if error feature. I know it is possible to use dbstop if all error in order to avoid jumping in the catch statement (I found that here: http://www.mathworks.com/matlabcentral/newsreader/view_thread/102907 .)

But the problem is that Matlab has a lot of inbuilt functions which throw errors which are caught and handled by other inbuilt functions. I only want to stop at errors caused by me.

My approach would be to use some statement similar to

global debugging; % set from outside my function as global variable
for i=1:1000
    if  ~debugging 
        try 
    end

        %do a lot of stuff

    if  ~debugging
        catch me
            sendmail('foo@bar.bz', 'Error in Matlab', parse_to_string(me));
        end
    end 
end

This does not work because Matlab doesn't see that try and catch belong to each other.

Are there any better approaches to handle try/catch statements when debugging? I have been commenting in and out the try/catch, but that is pretty annoying and cumbersome.