Questions tagged [debugging]
Questions about debugging techniques, using the built-in debugger, and/or the Wolfram Workbench debugger.
0
votes
0answers
20 views
Indeterminate values in a MultivariateTDistribution
I'm running a simulation and the following error message shows up:
...
0
votes
1answer
88 views
An example of symmetric, real entry matrix with non-real eigenvalues, according to Mathematica. Is this a bug?
The following matrix is symmetric and all entries are real,
...
0
votes
1answer
85 views
2
votes
1answer
65 views
How to trace value assigned to local variable(variables in Module)?
Bug introduced in v10.1 or earlier and persists through v11.3
CASE:4240757
Here is my code:
...
2
votes
0answers
35 views
Profiling - workarounds/fixes for unreliable RuntimeTools`Profile? Update added Clue
[MMA 11.0.1.0 Win 10 64-bit]
I have tried using RuntimeTools`Profile manually and the most useful profile[] function provided by @Carl-Woll in this answer.
Sadly, neither work reliably and the ...
0
votes
1answer
50 views
Plotting intermediate values of an argument in a recursive function
I've read through the documentation on tuning and debugging but feel like I am missing some important concepts. Many of the examples given presume the programmer is explicitly generating ranges of ...
3
votes
0answers
102 views
Profiling in Mathematica
This is meant as a broad question, because I couldn't find such a discussion on this topic (the questions I found are very old and basic, e.g. the most popular one only shows where to find Mathematica'...
11
votes
1answer
180 views
Profiling a package
I have some code that I want to profile to see how much time each step takes, for instance:
...
0
votes
0answers
23 views
Tips to debug Enterprise signed cdf notebooks
Mathematica Enterprise signed CDF notebooks don't generate warning messages nor generate output from Print. Are there ways to run signed CDF notebooks in a "debug mode" or so? I'm currently working ...
0
votes
0answers
49 views
Problem with small program: Error: “Charting Private pvar”
Im in the making of a smaller self-running application. I have made a small piece of the program as it has to look in the end. However, sometimes when i change some of the input for either "demand" or ...
0
votes
0answers
59 views
Understanding the Reduce error message
I am trying to execute the below expression expecting Reduce[] to provide a range for n1 and ...
0
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0answers
43 views
Define a new Front End Syntax for Function Argument Checking & Debugging
In this question I asked a basic question about how to check argument types such that there was useful output from the front end when calling functions. Based on elements of the nice answer by @j-m-is-...
2
votes
2answers
110 views
Debugging NDSolve to see numerical values at each time-step
I wish to debug my NDSolve function and this is my first time using the Mathematica debugger. I have read around and attempted various different ways of debugging but I cannot figure it out. I want to ...
3
votes
1answer
118 views
Force a function to report argument type mismatches
As a relative newcomer to Mathematica, I am still frequently caught out by coding errors that, at least by default, MMA does not indicate to the front end, in particular when I define a function and ...
4
votes
1answer
78 views
TracePrint does not work as in my book
I am using Mathematica 11.3
Here is an my execution of code from book "Essentials of Programming in Mathematica" (Fibonacci numbers):
...
8
votes
3answers
335 views
How to get frame around every function without any evaluation?
Is there a good universal method that allows the making of a frame around every function. In the output, functions should remain unchanged (no evaluation, or any other changes) and each function ...
1
vote
1answer
94 views
Working of MatchQ[] with Blank, BlankSequence, BlankNullSequence [closed]
This code:
In[76]:= Trace[MatchQ[{1,2,3}, {_?NumberQ}]]
gives:
Out[76]= {MatchQ[{1,2,3},{_?NumberQ}],False}
This code:
...
1
vote
0answers
36 views
How to run the newly created notebook “anonymously”?
How to test the autonomy of all calculations on .nb, i.e. run it so that it does not use existing variables from other .nb executables? And if it refers to a variable you did not create yourself to ...
3
votes
0answers
31 views
Getting a Stack Trace on parallel execution
I find debugging very difficult in Mathematica, perhaps because I am unfamiliar with the appropriate tools. Ideally, I would like a "break on error" like Matlab with step control, however for the ...
0
votes
2answers
64 views
Why do I get a Partition::pdep error?
I've been running an iterative job (j=1,2.,3,.....300,000,000). The vast majority of steps proceed smoothly. Every several million or so steps, I get a "General::inf: Input matrix contains an infinite ...
1
vote
2answers
127 views
ImageAlign keeps breaking down
I have posted the same question on the community (http://community.wolfram.com/groups/-/m/t/1394441?p_p_auth=YV2a4wzw).
I tried to register the movie posted below (compressed version here) using ...
0
votes
1answer
54 views
34
votes
3answers
1k views
Interrogating a running evaluation
Is it possible to find the values of variables of a running Mathematica evaluation, without interrupting it? For example, suppose I do:
Do[Pause[1]; a++, {50}]
...
6
votes
1answer
40 views
Trace and TracePrint are slow, How to Trace to a file for speed
Trace and TracePrint generates or prints a list of all expressions used in the evaluation of its argument. For complicated ...
7
votes
0answers
124 views
A bug in Derivative?
Update
This is a bug in v11.3 or earlier and is fixed in v12.
Original Post
Check this out:
...
0
votes
1answer
71 views
Want help with debugging a For-loop
I'm trying to run a simulation, which at the end gives a value 'qber'. Now I want to run this simulation multiple times with different values of 'p' each time. And these value of 'p' are actually the ...
3
votes
1answer
204 views
Bug: Wrong limit in Mathematica 11.1.1 and current WolframAlpha
Bug introduced around 11.1.1 and fixed in 11.2
...
2
votes
1answer
51 views
Problem in defining a function inside a module
I have a problem in defining a function in a module. I looked at Mathematica help and followed the same procedure.
...
1
vote
1answer
75 views
Why is ListLinePlot outputting weird graph
s = Import["Directory/FileName.xlsx"]
ListLinePlot[s[[1]], AxesLabel -> {"Time", "Voltage"}]
The graph is some sine wave but it outputs a huge number of lines ...
0
votes
1answer
57 views
Compilable table of Matrix diagonals function
1,
I am trying to make Compilable function which takes Matrix of zeroes and ones f.e:
...
4
votes
1answer
100 views
Notification if new output differs from old
I'm developing a package and keep a notebook of test cases to make sure a fix in one function doesn't break anything else. Right now, when I make a change to the package, I run the relevant parts of ...
3
votes
1answer
71 views
Detecting transformation rules and removing them
Is it possible to detect the non-standard transformation rules (DownValues, UpValues, etc) that activate in an evaluation (and ...
4
votes
1answer
247 views
A more appropriate way to use RuntimeTools`Profile
There's a powerful tool call RuntimeTools`Profile, but it's hard to use.
I must turn on Debug mode, then use ...
5
votes
0answers
97 views
Techniques in debugging with preview of possibly large expressions + garbage collection issues
First of all, all appreciate all suggestions how to rephrase the title to make it more friendly.
Here's the background:
Let's say your top level procedure flow is complicated, involves url calls, ...
5
votes
3answers
168 views
Is it possible to trace MorphologicalTransform?
Is there a way to see the arguments supplied to a function specified as second argument of MorphologicalTransform?
An approach with ...
12
votes
1answer
396 views
Easy printing of executable code
I'm working on a package that has functions that call other existing and packaged functions. I'd like a way to output what some of those key calls are, so users can see what's happening under the ...
2
votes
1answer
109 views
Print[] to console in Mathematica 11 [duplicate]
The Edit-> Preferences -> Evaluation menu is gone from Mathematica 11. But I want to redirect the output of Print with the option that used to be called
Print[] ...
1
vote
1answer
132 views
Debugging parallelized code
Is it possible to add a stack trace for this parallelized code to see where the problems stem from?
...
4
votes
0answers
45 views
Strange behavior of symbol::messageName in debugger [duplicate]
According to the documentation, there are two ways to define a message, which I implement as:
...
0
votes
0answers
33 views
Looking for the equivalent of C's __LINE__, etc
Some languages provide maintainable ways to specify the number of "the current line". In C, for example, one can use the __LINE__ macro.
Does Mathematica have ...
6
votes
3answers
285 views
Avoiding the suppression of messages by NIntegrate
Consider the following code:
test[x_] := If[1 < x < 2, Message[Test::message]; x^2, x];
NIntegrate[test[x], {x, 0, 3}]
5.33333333333334
I.e. it gives me ...
0
votes
1answer
66 views
Using Dialog inside a function to debug
I need to understand why my functions doesn't work.
Thus, I have put a Dialog at the beginning of it :
...
1
vote
1answer
77 views
How to write command in debug mode?
I need to debug a function, and to do it I would like to display variables, do few computations etc while I am at a breakpoint.
But I don't see where I could do that ? I have the stack window opened ...
2
votes
0answers
68 views
Piecewise function Syntax error only in debug mode
If I enter the following through mathematica (11.0) through UI $$\begin{cases} 1 &x \geq 0 \\ 0 &True \end{cases}$$ No error is reported.
$$\begin{cases} 1 &x \geq 0 \\ 0 &True \end{...
1
vote
1answer
47 views
If clause gives back 2 different result [closed]
I am writing a simple if clause, but keep getting wrong answers, so I ended up writing 2 almost the same if clauses, one giving back correct answer, and the other giving back wrong answer. Can't ...
13
votes
4answers
770 views
How to make a custom Echo
I usually check my intermediate variable by Echo.Like
Table[Echo@x, {x, 10}]
But when the intermediate variable have too much ...
32
votes
2answers
907 views
How do I disable the stack tracing feature in Mathematica 11?
Bug was introduced in 11.0 and persisting through 11.1
It looks like the Mathematica 11 stack tracing feature (see red ellipsis in front of any warning message) prevents the garbage collector from ...
0
votes
0answers
45 views
What is wrong with this code involving a large number?
Below is my code:
n = 15;
roots = Table[Sqrt[Prime[i]], {i, n}];
q = 10^125;
error = N[Abs[q*roots - Round[q* roots]], 12]
Here I have a large number q = 10^125. ...
4
votes
1answer
82 views
Weird Behavior of Notebook Creation with Module?
Compare the following two codes:
Module[{nb},
nb = NotebookPut[];
SetOptions[nb, NotebookEventActions :> {{"KeyDown", "1"} :> NotebookWrite[nb, "1"]}]
]
...
3
votes
1answer
115 views
How to debug (by step-through) with OptionValues?
If I have a function illustrated by this simplified example...
...
