How to stop on a variable getting a specific value?

I have a variable that can change its value in multiple locations within a long function.

For debugging purposes I want to stop-in-debug once this variable gets a specific value.

I could go throughout the code and set a conditional breakpoint in each line it can happen, but I wonder, if there is a way to set a "global" conditional breakpoint?

Answer 1

[dpb]

dbstop in file at if expression

is best you can do I think...you don't have to manually insert the breakpoint at every line but would have to get the line numbers and put into a little script to run...a little grep utility could possibly be invoked to build/retrieve the lines in the m-file with an assignment to the subject variable name???

ADDENDUM:

I've long thought the debugger should have a watch facility besides...

[Evgeny Bespechansky]

You seem to be right.

Without the "at" statement the condition fails - it is defined for the variable that is undefined at the beggining of the function. So I have to execute something like

for i=61:200
    cLine = sprintf('dbstop in myFunc.m at %d if myVar>X', i);
    eval(cLine);
end

It looks ugly and not much easier than to search the code for every line where myVar can change its value and set a breakpoint manually...

[dpb]

Excepting you could build a function that hides the ugly to invoke...