All Questions
94,865
questions
22
votes
7
answers
19k
views
How do I replace a variable in a polynomial?
How do I substitue z^2->x in the following polynomial z^4+z^2+4?
z^4+z^2+4 /. z^2->x
...
- 2,633
24
votes
7
answers
5k
views
Plotting an implicit polar equation
Mathematica can use ContourPlot to draw implicit Cartesian equations, but doesn't seem to have a similar function to plot an implicit polar equation, for example
$\...
- 343
16
votes
2
answers
423
views
Interfacing Mathematica with MINE using JLink
In last December's Science David N. Reshef, et al. proposed an interesting method to detect associations in data (Detecting Novel Associations in Large Data Sets, Science 334, 1518, 2011). Contrary to ...
56
votes
2
answers
3k
views
How do you set attributes on SubValues?
SubValues, as discussed in a previous question, are declared as follows
...
- 34.1k
9
votes
4
answers
429
views
Unexpected behavior from GatherBy in version 7
Bug introduced in 7.0 or earlier and fixed in 8.0.4 or earlier
I have come across what appears to be a bug in GatherBy. It appears similar to the problem of using ...
- 272k
61
votes
5
answers
2k
views
Placement of Condition /; expressions
It is my practice to place Condition expressions on the left side of := and :> in almost ...
- 272k
49
votes
7
answers
10k
views
Intersecting graphics
Does the Mathematica graphics system have any concept of intersecting graphics? I've not found much in the documents so far. For example, if I want to show the intersection of two shapes:
...
- 24.3k
11
votes
3
answers
2k
views
Is it possible to import dates and times directly as AbsoluteTime and by pass DateLists?
Date and time calculations are quite slow so I am exploring ways to minimize the number of calculations performed. As an example:
...
- 37.6k
13
votes
2
answers
428
views
What's a robust way to insert another extension into a filename?
I'd like to add an extension to a filename before the file extension, otherwise leaving the given filename the same. In particular, absolute filenames should stay absolute, and relative filenames ...
- 4,961
15
votes
1
answer
1k
views
Is it possible to use C# LINQ from Mathematica using .NET/Link?
Using Mathematica's .NET/Link (NETLink`) package, is it possible to call out to .NET's LINQ facilities for list manipulation and other operations?
- 6,473
17
votes
1
answer
1k
views
How can I share objects with dynamic content with non-Mathematica users?
Often when I construct some cool Manipulate[] function, I would like to share it with others—non-Mathematica users. Some software, notably Cinderella, ...
- 4,751
7
votes
1
answer
543
views
Operations on online files via public URL access
I need Mathematica to access an online public directory via some URL (fake in this case)
http://example.com/images
and perform operations similar to those Mathematica can do on OS directories and ...
- 73.4k
29
votes
3
answers
1k
views
What determines the value of $MaxNumber?
What determines the value of $MaxNumber?
$MaxNumber
1.233433712981650*10^323228458
...
- 272k
14
votes
3
answers
2k
views
Strategies to avoid LessEqual::nord in NMinimize?
When using NMinimize on functions with complex intermediate expressions (but a real end result), quite often one gets the error ...
- 19.2k
22
votes
2
answers
799
views
Programmatically copy code so that all output is commented out
UPDATE: The final palette has a new home here! Please test and provide feedback (usability, suggestions, bugs)
A note to the readers and voters: This is intended for community use, so please test the ...
- 236k