Tagged Questions

Questions on the manipulation of List objects in Mathematica, and the functions used for these manipulations.

160 views

Sum over multiple indices that take specific values

Pretty simple question: how do I sum over multiple indices that can only take specific values all together? To clarify: let's say I have the following sum: $\sum p_{a,b,c} f(a,b,c)$ where $f$ is a ...
79 views

How to efficiently find period orbits in a series defined by recurrence relation?

I have a series defined as $z_{n+1} = z_n^2 + c$, which is the series for the Mandelbrot set. I have defined it, in order to plot the set, as ...
146 views

Manipulate of Region Plot

I try to illustrate a generation of an amoeba to a tropical curve, namely. ...
183 views

Matching entries then finding positions of two lists

I'm trying to analyse data with Mathematica. I have a big array with various columns representing timestamps and then lots of data. I have some code that will produce a list of timestamps when the ...
912 views

Subtracting two plots from each other after shifting one

I have the following lists representing energy spectra that need to be subtracted from each other to produce a difference spectrum. ...
52 views

Troubleshooting Program Meant to Swap Elements

I wrote a program that is supposed to take a list (of arbitrary length) of pairs of the digits of binary numbers (e.g. ...
139 views

How to remove the list bracket in some expression?

I have two problems with the List bracket {}. First, I want to get a specific component of LeviCivitaTensor, so I should use ...
188 views

How to speed up Select with MemberQ for large lists?

I have two large lists: list1 and list2. I would like to select elements of list1 only if they appear in list2. Since the list1 has dimensions of (335000, 2) and list2 : (122000, 4), it's taking a ...