All Questions
94,865
questions
67
votes
4
answers
6k
views
How do I evaluate only one step of an expression?
I am looking for a simple, robust way to evaluate an expression only one step, and return the result in a held form.
The definition of a single step is ambiguous, and this itself is probably worthy ...
- 272k
18
votes
1
answer
4k
views
Combined numerical minimization and maximization
I want to numerically calculate the maximum of a function defined by the minimization of another function, like the following:
...
- 19.2k
25
votes
5
answers
1k
views
How can I work out which functions work with SetOptions?
Not all functions seem to work with SetOptions. e.g.
...
- 37.6k
3
votes
2
answers
542
views
what is the command to make Mathematica beep each time there is an error even for the same command?
sorry for a basic question, but does any one know what is the trick to make the front end beep at me each time I issue the same command (which contain an error)?
It now only beeps the first time, ...
- 147k
18
votes
7
answers
1k
views
Elegantly pairing up mismatched lists
HistogramList returns a list of bin boundaries and a list of counts. There is one more boundary than counts, and I'd like to pair them up so I can feed it into <...
- 20.8k
4
votes
3
answers
1k
views
Drawing graphics part by part
What I want to do is to draw graphics part by part, because I made a function that generates coordinates according to which I will draw graphics. The problem is that MMA does not operate as I expected....
- 683
16
votes
2
answers
2k
views
Constructing functions with variable number of output arguments
In Mathematica, you can construct a function f to have different definitions based on its input arguments. For example, ...
- 89.1k
36
votes
4
answers
3k
views
How to collect result continuously (interruptible calculation) when running parallel calculations?
This is the most common pattern to compute a table of results:
Table[function[p], {p, parameters}]
(regardless of how it's implemented, it could be a ...
- 236k
18
votes
4
answers
2k
views
Strategies for avoiding and handling shadowing
When dealing with namespaces in Mathematica (BeginPackage, $ContextPath ...) one is unavoidably confronted with the problem of ...
- 23.6k
16
votes
2
answers
381
views
How do you determine the optimal autocompilation length on your system
When you pack lists there is an overhead therefore packing a list with, say, 2 elements is likely to cost more than you get back in efficiency. Mathematica has default list lengths for which functions ...
- 37.6k
23
votes
2
answers
758
views
SetAttributes[f,Flat]: Why the order dependence?
I'm experiencing a strange phenomenon. Here's a (quite artificial) test case:
The following definition work just fine:
...
- 19.2k
33
votes
0
answers
3k
views
Custom package development: Basic steps [duplicate]
Every once in a while, I write a generic function that I use quite often for months to come. However, package development in Mathematica is not very well documented from what I can tell, and I was not ...
- 15k
16
votes
2
answers
5k
views
How to represent and manipulate abstract indexed vector (or tensor) expressions?
I have a couple abstract indexed quantities, both differential elements
$dx = dx^\mu e_\mu + x^\mu de_\mu$
$du = du^\mu e_\mu + u^\mu de_\mu$
I can compute the expression $(dx + du) \cdot (dx + du) ...
- 6,438
35
votes
3
answers
13k
views
How to export large graphics?
I'm using Raster to create large graphics (1000 by 1666), which I want to Export as a JPEG or TIFF in a resolution that can be printed in a large size, 3' by 5'. I'...
- 1,161
35
votes
2
answers
2k
views
What are recommended guidelines for developing packages?
This might be of general interest – I have different questions regarding naming conventions, contexts, subcontexts, shadowing, etc., but I do feel that they are closely related, thus I don't really ...
- 47.1k