Questions on how to write code in a better or different style, using Mathematica's capabilities for coding in multiple styles.

learn more… | top users | synonyms

9
votes
3answers
794 views

Generating an autoregressive time series

Find $X_t = c_1 X_{t-1} + \dots + c_n X_{t-n} + n_t$ for given $c_i$, initial conditions $(X_1, \dots, X_n)$, and distribution for i.i.d. $n_t$. I would like to know if there is a more efficient or ...
14
votes
2answers
860 views

Speeding up random walk for many particles

I am trying to speed up this code for many particles to take a random walk. I'm not sure why it is so slow for such a simple task. I got a few hints from colleagues to reduce the precision of the ...
14
votes
2answers
530 views

Are there advantages to using generalized Part extraction instead of specialized functions like First, Last?

There are many ways to extract different parts of lists in Mathematica. For example, the first part of a list v can be accessed either as ...
13
votes
4answers
402 views

Short syntax for accessing System`Utilities`HashTableAdd and System`Utilities`HashTableGet

I have a need for a struct analogue in Mathematica. After reading this post I came to the conclusion that System`Utilities`HashTable is one of the best options. But ...
8
votes
3answers
363 views

Can this code be written in a more functional style

Referencing this question, I wonder if the following code can be written more concisely using a functional style, i.e. without For loops or ...
21
votes
2answers
2k views

Extracting values from nested rules in JSON data

I have been using Mathematica to analyse some data from the StackExchange API. It is conveniently available in JSON form, which Mathematica interprets as replacement rules. However, some of the rules ...
16
votes
1answer
364 views

Are there advantages to using additional arguments of common functions rather than alternative ways of calculating with lists?

(Apologies for the long question title.) One of the interesting, if sometimes confusing, things about Mathematica is that there is always more than one way to do things. Even intermediate users can ...
5
votes
1answer
296 views

Alternative to overloading Set

In the ideas shared in my answer to this post Struct equivalent in Mathematica? at the end I propose a solution that changes the way Set works in a particular case that can be expressed in plain words ...
12
votes
3answers
453 views

With versus Function

I've seen people compare Block with Module and With as scoping constructs, and try to figure ...