Linked Questions

24
votes
0answers
332 views

Documentation of the frequently-used functions in the context of Internal` and Compile` [duplicate]

In this site, I have gradually found out that there is a collection of functions in all kinds of answers. For instance, Compile`GetElement, ...
364
votes
13answers
78k views

Where can I find examples of good Mathematica programming practice?

I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't ...
58
votes
4answers
2k views
43
votes
3answers
2k views

Applying TextRecognize on alpha-numerical table

From time to time I have to extract data from scanned papers or rasterized PDFs. Imagine a table of the following kind (but much longer): A naive application of ...
15
votes
8answers
666 views

UnFlatten an array into a ragged matrix

Trying to unflatten an array that was part of ragged array of sub matrices. As input we have flattened array: ...
35
votes
2answers
2k views

when is f@g not the same as f[g]?

I have always thought that f@g will give the same result as f[g] in all cases, and it is just a matter of style which one to use ...
24
votes
3answers
799 views

Is using undocumented functionality a Bad Idea™?

Mathematica has a lot of very useful undocumented features. For example a hash table, a built-in list of compilable functions, additional options to CurrentValue, ...
20
votes
5answers
1k views

How to splice together several instances of InterpolatingFunction?

I have a set of InterpolatingFunction returned by NDSolve which are valid over different (but overall continuous) domains. How ...
21
votes
4answers
895 views

“Unflattening” a list

Imagine we have a list with some hierarchical structure: list = {{{2,3},{2,4}},{{{3,4}}},{{5,6},{7,8}}}; Which we then flatten to some level in order to process ...
16
votes
4answers
875 views

How to keep Collect[] result in order?

For example, Collect[(1 + x + Cos[s] x^2)^3, x] gives the result ...
21
votes
2answers
553 views

How to write beveled fractions?

How to write beveled fractions like ${}^a/_b$? In contrast to $\frac{a}{b}$ and $a/b$ (see this question).
17
votes
1answer
1k views

Optimizing a Numerical Laplace Equation Solver

Laplace's Equation is an equation on a scalar in which, given the value of the scalar on the boundaries (the boundary conditions), one can determine the value of the scalar at any point in the region ...
13
votes
2answers
914 views

Changing the inter-item spacing in Legends (version 9 and up)

The legending functionality in versions 9 and higher is much easier to use than the PlotLegends package and other bespoke ways of creating legends in earlier ...
8
votes
2answers
339 views

How to display the support $\mathrm{supp}(f)$ of a piecewise function $z = f(x,y)$?

I'm wondering how to display the support $\mathrm{supp}(f)$ of a piecewise surface $z = f(x,y)$. As an example, let's consider the following piecewise function (and plot it): ...
8
votes
2answers
348 views

How to get a list of available appearance/styles/Methods?

This is a basic question but I haven't found any answer yet :/ Available appearances for Button[] are mentioned in Help, those ...

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