Re: Debugging Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg94697] Re: [mg94654] Debugging Mathematica
- From: "David Park" <djmpark at comcast.net>
- Date: Sat, 20 Dec 2008 06:23:35 -0500 (EST)
- References: <7272378.1229691076470.JavaMail.root@m02>
Nikolaus,
I know there are various sophisticated debugging tools but when developing
routines I have never found it necessary to use anything other than
temporary Print statements. With a Print statement you can display whatever
you wish, in whatever form you wish. So:
f[x_,y_] := Module[{a,b}, ...; Print[First[a]]; ...]
Also when developing a routine I often add statements one by one and test
each time to make certain the intermediate results are what I was expecting.
David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/
From: Nikolaus Rath [mailto:Nikolaus at rath.org]
Hello,
I have trouble debugging a function that I wrote. The function is of the =
form
f[x_,y_] := Module[{a,b}, ...]
I am able to set a breakpoint in the function and Mathematica
correctly stops execution.
However, now I want to inspect the state of some local variables.
Unfortunately some of them have very large contents (~500 000 reals),
so when I open the stack and try to expand the "Local Variables" cell,
the frontend just hangs.
Is there a way to *selectively* display some of the local variables?
What I would like most is to be able to execute code in the current
stack frame, e.g. if I could simply evaluate a[[1]] in some notebook
to get the first element of the local variable a. Is that possible?
I am using Mathematica 7.
Best,
-Nikolaus
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