Two Graph Puns

Come on Apes, what's going on? How will we know?

I'm learning graph theory and while I'm not quite confident I'm trying to use simple examples to get some practice in. Currently I'm trying to create a function that finds all simple paths between two vertices in a graph, but I'm not sure if my approach is correct.

Let's say I have the following graph:

Sorry, dark mode users!

If I want to enumerate all the paths from A to D, I could start doing a DFS approach from A, advancing edge per edge until I hit D or until there are no more candidate nodes to visit. I could keep track of each edge's predecessor to enumerate the reverse list of edges that make up a single path. However, this only gives me one path, and so a pure DFS will ignore all other possible paths as soon as it finds one path that connects A to D.

But if I assume that one or more paths can exist between nodes, then naturally I could count them and give them an index. I could say, for example, that the first path is [a, b, c] and the second path is [a, g] and so on. The longest simple path that I can think of in this example is [e, f, b, c].

So with these assumed indices, I could add a dictionary property to each edge that contains a path index as its key and the edge's predecessor in the path with the given index as its value. This way, I should be able to backtrack from D given its multitude of predecessors.

I was wondering if this approach could work, and if it is actually correct for all graph types (i.e. directed, undirected, with or without cycles, multiple edges between nodes, etc.).

I'll try to code a solution and create a gist but I'm not very confident I'll get it done any time soon.

UPDATE: I wanted to try this approach with a dictionary of path indices, so I wrote code to count all the possible paths to populate an empty dictionary with the right keys, turns out this function already pretty much gives me the right sequence of nodes and edges, meaning I can also directly get all the paths from this function, which actually solves the problem I had in mind to begin with.

UPDATE 2: I've created a gist containing the C# code I've written (Python's not my strongest language, sorry!)

https://i.imgur.com/Nqypjr0.jpg](https://i.imgur.com/Nqypjr0.jpg)

Hi friends,

As the title says, what is the name of this graph in excel and can I create it with two data sets displaying side by side (as you might do with a column graph to show progress)?

Thanks for any help!

I used two different computers and the exact same diagrams and inputs. However, I noticed one of the Sine Waveform function block has a "duty cycle (%)" input in it. Why is that default in one of them and why can't I get rid of it? Please help. Thanks

EDIT: My careless bottom just figured out I used a square waveform graph.

Two different graphs with same inputs

Block Diagram

Sine Waveform properties

I am a researcher who deals with a large amount of botanical data. Most of it fits extremely well into the relational format that some of the more "traditional" DBMS's exhibit (MSSQL, MySQL, PostGRES, etc).

A small subsection fits very nicely into a graph database (maternal lineage/cloning data). Yes, it can definitely be fit into a relational table, but as the lineages/clones continue onward the data format doesn't really lend itself to efficiently querying through a relational database.

Do you think it's worth it to split this lineage data off into it's own separate database so it can be investigated more intuitively? Or consolidate everything into one database for consistency and just deal with the potentially slow query times/slightly convoluted queries to get these lineage relationships?

What would you do?

I have an unusual issue. I am a relatively new admin looking after a Zabbit 4.2.8 server, and an unusual issue has been reported with a discrepancy in two different graphs.

The metric itself is a fairly custom but simple and does a count of inbound TCP connections on a certain port once every 30 seconds.

system.run["ss -t | grep '172.31.8.140:11211' | wc -l"]

One graph is a widget on a Dashboard, which shows the following:

https://preview.redd.it/wjwyiewz29c81.png?width=1416&format=png&auto=webp&s=87c21ad5c6c1611adee0ccc7207719aaae40c3d3

The other graph is situated within Monitoring < Graphs, and shows the following:

https://preview.redd.it/deuvhj1139c81.png?width=1419&format=png&auto=webp&s=f0e8c4359925fb180c14c633806e18fcd8333d97

https://preview.redd.it/48mfwl1239c81.png?width=1648&format=png&auto=webp&s=f57c7e2ab5c618db288dfc7c4bb84a6efcd715fb

I’ve made copies of both and played around with the settings, but mostly of these seem to relate to display options and I’ve not found anything that makes any dramatic changes in the content of either.

I am aware the version of Zabbix is out of date, and I am working on an upgrade to bring the server up to 5.0.

In the interim however, I’ve done some googling for potential known bugs, but I’ve not found anything definite so far.

Is anybody aware of any (presumably historic) issues of this type, or can anybody offer any ideas if there’s anything else I can do to try and resolve this problem that might help pre-upgrade?

Thanks in advance.

Edit: Apologies, one of the graphs also shows some steady "0" data for server 02, but it's just the data for server 01 I'm concerned with.

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i really like the "market" section of webull because it allows you to see the average % gain/loss of every sector over the past 1 day, 5 days, 1 month, and 3 months. however, it doesnt let you view it in a graph format.

i want to be able to see graphs of how entire sectors are moving to help me better visualize what is happening in the markets

Hello, I am trying to decide which two electives I will do alongside computer systems in my final semester of CS. I am hoping someone has done all three of these subjects and can help me out.

My current thoughts:

GRAPH THEORY:

P: loved real analysis last semester and would not mind doing another maths. Also the content seems interesting and seems applicable to CS. It is also harder to do out of uni.

N: maybe not as relevant to CS as other two (although sometimes maths subjects are better to do than cs)

AI:

P: enjoyed the algorithm subjects and the content looks fun.

ML:

P: good for industry

N: I can probably find a better course for ML online (if I can be bothered)

Let me know if you have any insights or if you really loved one of these subjects!

I am supposed to a predicate graph\3 where the first two arguments are nodes and the third argument is a graph. The predicate should check whether there exists a path between the two nodes in the graph, i.e

graph(n(1), n(4), g([n(1),n(2),n(3),n(4),n(5),n(6),n(7),n(8)],
[e(n(1), n(2)), e(n(1), n(3)), e(n(3), n(4)), e(n(4), n(5)),
e(n(5), n(6)), e(n(5), n(7)), e(n(7), n(8))])).

should return

true

and

 graph(n(4), n(1), g([n(1),n(2),n(3),n(4),n(5),n(6),n(7),n(8)],
    [e(n(1), n(2)), e(n(1), n(3)), e(n(3), n(4)), e(n(4), n(5)),
    e(n(5), n(6)), e(n(5), n(7)), e(n(7), n(8))])).

should return

false

My code looks like this:

%base case    
graph(N1,N2,g(_,Edges)):- member(e(N1,N2),Edges). 
%recursive rule 
graph(_,N3,g(_,Edges)):- member(e(_,N3),Edges).    

The problem I'm having with my code is that it somehow continues applying the recursive rule even though it shouldn't be anymore.

I get the correct true and false values, as output, but it keeps trying to apply the rule endlessly if it comes back as true. I can't figure out what's going on there and would love some explanation for why my code does this and how I can fix it.

I have two separate line graphs stacked on one another in a sheet. Both have dual axis measures so that I could have line graphs with enlarged dot marks on top to help each point pop out.

Is it possible to put both of these dual axis line graphs into one view instead of two stacked charts?

Hey, I'm new to desmos and I just wanted to make a nice visualisation of something we are currently working on in my physics class. The only thing I can't figure out how to do is how to only depict a certain graph if 2 others have an intersection point. I heard there is something you can do with logic within desmos? But I couldn't find an answer by myself. Here's the link to the project: link What I want to achieve: do not depict the blue graph (g) if the red graph (y) intersects with the green line (f). Do not worry about the purple equation, that is merely there to give me the x value at which they intercept.

So I heard you need to sum both of them and then divide by 2 which works pretty well for this:

https://snipboard.io/8TJzbg.jpg

But what about this?

https://snipboard.io/W0DGgf.jpg

Say I need to find the midpoint between π/2 and π.

Adding them and then dividing by 2 (https://snipboard.io/1wX25j.jpg) gives me 3π/2 which is already somewhere else on the graph: https://snipboard.io/wDqtXO.jpg

So what to do in this situation?

I know i probably wont need to zoom in that much but just curious.

I essentially want to achieve this. I looked into fl_chart but it doesn't seem to support this.

i really like the "market" section of webull because it allows you to see the average % gain/loss of every sector over the past 1 day, 5 days, 1 month, and 3 months. however, it doesnt let you view it in a graph format.

i want to be able to see graphs of how entire sectors are moving to help me better visualize what is happening in the markets

i really like the "market" section of webull because it allows you to see the average % gain/loss of every sector over the past 1 day, 5 days, 1 month, and 3 months. however, it doesnt let you view it in a graph format.

i want to be able to see graphs of how entire sectors are moving to help me better visualize what is happening in the markets