Linked Questions

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 ...

This issue has largely been mitigated in 10.0.1. New timings for the final test below are: ...

First, a bit of a long introduction to my problem: I only have a few weeks of Mathematica experience. I am creating a mathematica application that calculates some material properties of steel based ...

If I have the following Dataset ...

Here is how to Generate data the function is below with two images to generate data img1 img2 ...

I am developing a weighted KNN algorithm. In a step, I need to do the sum of weights of each class. For example: ...

Is there a faster way to find the position of certain elements (referred to as target below) from a list (referred to as myList ...

An example in http://www-zeuthen.desy.de/theory/capp2005/Course/hahn/mathematica.pdf amounts to the following ...

Suppose we have a point set, the points are labeled 1,2,3,....n. And p[i] is the coordinate of the point. Now I want the label of nearest and next nearest point (...

Consider if you would the case where we have some list of elements: list0 = {54, 4, 7, 9, 3, 54, 4, 20, 2, 456, 2, 3}; And we have some target list: ...

Supposed that: list = {2, 3, 5, 7, 9}; sublist = {{3, 3, 5}, {2, 2, 2, 7, 9}}; I want to change each sublist in sublist as following: Find the positions of ...

Bug introduced in 10.0 and persisting through 11.0.1 or later Bug introduced in 10.0 and fixed in 10.4 Association is new in 10.0. Bug still present: ...

I have just started to get used to Mathematica's Map, Apply, and related functions, and I can't figure out how to do maps that require working "one level down". For example, I am currently trying to ...

In Mathematica 9, I used to be able to do rules = Dispatch[{'a' -> 1, 'b' -> 2}] rules[[1]] to extract the rules from ...

I have spent quite some time trying to figure out what the fastest way is to get a list lists of all subexpressions and their positions. I have tried things with MapIndexed, which seems ideal in cases ...

The issue outlined here seems to be no longer present in version 10, if you use a Dispatch table! This because a Dispatch table ...

I have the following problem and obviously I need help 1) a list of choices --- in fact journals but this doesn't matter ...

I have a list of element pairs: pairList = {{1,2}, {2, 3}, {3, 4}, {4, 5}}; I'd list to pick a subset of the elements in this list: ...

This question has been addressed adequately for pattern matching. However, I have a similar task with floating point data. I am looking for an efficient way to delete duplicates within a tolerance ...