What is wrong with: dbstop in sake_cut_block2 at 10 if 'i == 559' ?

Hello,

I would like to pause the execution of a function (I wrote) at a specific location, when an expression evaluates to true.

More specifically, I have a counter (i), and when it reaches a specific value, I want MATLAB to pause the execution and enter debug mode.

From the documentation (<http://uk.mathworks.com/help/matlab/ref/dbstop.html?refresh=true)>, I understand that the command below should do the trick, but the file does not pause.

    dbstop in sake_cut_block2 at 10 if 'i == 559'

Can anyone tell me what I am doing wrong? - thanks!

Answer 1

[Image Analyst]

I didn't see where they made the condition a string. What happens if you just use the condition as a boolean and not as a string literal?

dbstop in sake_cut_block2 at 10 if i == 559

[Karin]

There will be an error:

dbstop in sake_cut_block2 at 10 if i == 559
Error using dbstop
Too many input arguments.

[Karin]

You can find the instruction to make it a string by getting help from the Command Window directly.

help dbstop

[Karin]

It turns out that stopping at a line where there is a for loop starting (which was the case of my file) is not supported. So make sure you specify a line for the dbstop that is not where a loop starts.

[Image Analyst]

Ah - a key thing you left out (the line of code it was supposed to stop on). Another thing - if the line you say to stop on is a comment, then it will stop at the next executable line of code.

Answer 2

[Karin]

It turns out that stopping at a line where there is a for loop starting (which was the case of my file) is not supported. So make sure you specify a line for the dbstop that is not where a loop starts.