This tag is intended for the review and improvement of style for already functioning code. It not meant to change the objective of the code.

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21
votes
1answer
575 views

Strategies for solving problems involving searches

As an example of a search-oriented problem, consider finding all constrained $n$-colorings of a graph. An "$n$-coloring" associates one of $n \ge 1$ colors to each vertex in such a way that no edge ...
2
votes
3answers
691 views

Using DSolve to solve for x[t,parameter]

I'm trying to solve an ODE with two independent variables (a cannon firing from a cliff incorporating wind resistance dependent on velocity). I've tried the following for the x-component: ...
6
votes
2answers
761 views

Elegant way to handle columns operations

Inspired by this question from @sjdh and by my recurrent use of columns operations in database sets, I was looking for one way to make columns operations more symetric, so I can handle with matrix and ...
0
votes
1answer
367 views

Calculating orbital period for the logistical map [closed]

I have the following MatLab code ...
4
votes
1answer
168 views

Feedback on my Subscript code

I have written a code, and I need a little feed back.. I want to make the Subscript distributive across (1) addition and (2) multiplication to mimic short-hand for ...
-1
votes
1answer
169 views

Some Problem with WhenEvent!

Anyone knows what's the problem with the following code and how can I fix it? I am not sure that I wrote the WhenEvent section correctly. By the way, I want to solve the equations and then plot y vs. ...
2
votes
1answer
511 views

3 hour calculation? ParallelMap & ParallelTable

I'm having some problems with slow Mathematica code... I'm basically doing a computation that's is expected to take 3 hours (!) in my Core i7 with 4 processors... I'm basically computing an index (of ...
2
votes
1answer
168 views

How to override `?NumericQ`

I have a function myFunc which I is to be displayed cleanly if arguments are symbolic, but which can also be numerically evaluated. I do this by defining a ...
3
votes
3answers
529 views

Speed optimization

I have a part of a program that I have to repeatedly call many times (about 2000 to 10000 times) ...
4
votes
2answers
915 views

How to fix BodePlot that comes with Mathematica?

I am using Mathematica to go through the examples and exercises on the book Modern Control Systems, 6th edition by Dorf. On page 605, there is a table (Table 8.5) with the Bode plot for several ...
9
votes
1answer
406 views

TemporalData frequency option as in R

I'm studying R, and am very impressed by the simplicity of some commands and in the way R handles temporal data. For example, in R, if you have some one-dimensional temporal data, you can easily ...
3
votes
1answer
101 views

Best way to transform text into number in a big array

I have a big array of data that I imported from a lot of XML files. To get the data, among other manipulations, I use this function: ...
13
votes
9answers
561 views

Thread over list in different levels

I have these two lists, both with the same length in the first dimension: ...
5
votes
2answers
529 views

How to create a simple interface to get file path and execute some code on it?

I need to create a simple user interface to choose one file in the notebook directory, import it and execute some functions on the imported data. For the first version I created this code: ...
14
votes
1answer
1k views

Poisson solver using Mathematica

I am looking for some help with a Poisson solver I am writing in Mathematica. The code is quite long with Arrays plugged in, so the full details can be found at http://pastebin.com/uSrSDcW6 I am ...
11
votes
3answers
519 views

Simpler way to fill date gaps with zero values

One basic problem when working with data like sales and dates is the case where you dont't have sales in all days, so you have to fill it to take information as average or to make a plot. See this toy ...
3
votes
1answer
286 views

How to improve this dynamic progress bar code

I created this progress bar to use in my codes: ...
16
votes
0answers
623 views

Fast Spherical Harmonics radiative transfer

This is a rather specific question and I apologize for spamming you with some lengthy code. But it could be interesting for some reader and maybe you can help out, so please bear with me. I am using ...
8
votes
2answers
694 views

Speed up Mathematica code involving Convolve

I'm trying to plot the averaged autocorrelation function of a random wire profile $\xi(x)$ which is build from unitsteps which are each L units long. To calculate the average I'm generating nMax ...
4
votes
1answer
237 views

Symbolic bit vectors

I'd like to see how addition and xoring bitvectors mix together. To do this, I implemented (a primitive) vec_add and vec_xor: ...
11
votes
2answers
507 views

What's the most “functional” way to do Cholesky decomposition?

I can do Cholesky in a procedural style, such as: ...
7
votes
4answers
559 views

Loop optimization

I wrote this to generate a 6D distribution of particles. ...
22
votes
7answers
991 views

Splitting words into specific fragments

I am looking into splitting words into a succession of chemical elements symbols, where possible. For example: Titanic = Ti Ta Ni C (titanium, tantalum, nickel, carbon) A word may or may not be ...