Questions tagged [indexing]
The indexing tag has no usage guidance.
7
questions
2
votes
2answers
46 views
How to identify index intervals that contain a value?
I have a really simple question but, sorry, I can't seem to find an elegant solution to other than iterating through. I have a list of indices, and a relative list of values, I would like to extract ...
6
votes
2answers
81 views
How to create a nested list of variable depth with indexed elements
i want to obtain this definition of a nested list
t = Table[C[i, j], {i, 3}, {j, 3}]
with arbitrary depth,
...
6
votes
2answers
178 views
Contracting indices in lists
Using an answer to this question (Working with Dirac Gamma Matrices using FeynCalc - A simple problem), I defined
...
2
votes
1answer
58 views
how to add labels of points next to it based on index in ListPlot
I have a list of some points. I plotted each point and its closest surrounding points.
...
4
votes
1answer
60 views
Replace pattern with the number of matches so far
I want to replace a n-th pattern match in an expression with n. This is a very simple task, though it appears very hard to find an elegant implementation.
For example, with input
...
1
vote
1answer
46 views
Sum index in function collides with input variable
When I enter the following:
Clear["Global`*"]
Func[f_, xx_] := Sum[D[f, xx[[s]]], {s, 1, 2}]
Func[x^2 + y^2, {x, y}]
Func[x^2 + s^2, {x, s}]
The first function ...
2
votes
3answers
185 views
How to search within notebooks on Windows 10?
I have a lot of notebooks scattered in my downloads, documents and desktop folder. I have all the required locations on Windows indexing options but if I look at Advanced Options and File Types and nb ...
