Linked Questions

5
votes
2answers
164 views

Why don't Part, Apply and other standard tools work with Region objects? [duplicate]

Consider the following discretization of a region object: region = DiscretizeRegion[Disk[], MaxCellMeasure -> ∞] Head[region] InputForm[region] which returns ...
2
votes
1answer
64 views

How to extract argument of MeshRegion-Object? [duplicate]

Consider examplary a MeshRegion-Object test = MeshRegion[{{0, 0}, {1, 0}, {2,1/2}, {2, -1/2}}, {Line[{1, 2}], Line[{2, 3}],Line[{3, 4}],Line[{4, 2}]}]; Looking ...
14
votes
3answers
315 views

Evaluated vs. unevaluated Association

This question might have a remote connection to my older question, it is also about sameness of expressions and subtle differences observable only in certain forms. I encountered this strange ...
12
votes
4answers
747 views

Removing edge weights from a Graph

Bug introduced in 8.0 and persisting through 12.0 How can I remove EdgeWeights from a Graph without affecting any other ...
17
votes
2answers
248 views
8
votes
1answer
1k views

Region from points

Is there a built-in way to define a 3D region from an arbitrary list of points. The points will represent vertices of the edges of the region and we can assume that 1) they are not all on the same ...
14
votes
1answer
234 views

Fractional Keys in Associations

I got into an unfortunate situation, involving fractions that can get changed by evaluation, which occur as (part of) keys in my associations. I will probably steer far away from the entire situation, ...
8
votes
2answers
304 views

Why equivalent Graph objects yield different results?

Bug introduced in 10.0 or earlier and fixed in 12.0. I am working with Mma 11.2 for win 7. I am confusing about the results returned by ConnectedGraphQ described ...
8
votes
1answer
417 views

Remove or change edge weights of graph with good performance

How can I remove edge weights from a graph, or change all edge weights in one go, with good performance, while preserving edge ordering? Consider this weight vector and unweighted graph: ...
5
votes
1answer
264 views

How to represent 1 as Symbol[“Integer”]

Maybe this is a boring question, but I cannot figure it out. Because every expression has a Head, and Head[1] is ...
3
votes
2answers
239 views

How do I change the Head of Graph into List?

I am trying to change the Head of b (a NeighborhoodGraph) from Graph into List but Apply seems to fail. I start with a list of connected vertices: ...
3
votes
2answers
97 views

How do I replace expressions inside a Graph object?

Say I have a Graph with some labels, and I want to change one of the labels. For example ...
6
votes
1answer
96 views

How to test if an Audio object is file backed and extract the file path?

Audio objects can be file backed and support out of core processing. How can I test if an Audio object is file backed and ...
4
votes
1answer
71 views

Extract RawArray from Audio

Audio objects backed by in-memory data (not files) seem to contain a RawArray. Is there a way to get the ...
9
votes
0answers
114 views

How to modify NDSolve`StateData without crashing the kernel?

Probably a hard question, but it's better to cry out loud. Reminded by Chris K, I noticed my fix function has been broken since v11.3. After some checking, I ...

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