nodal | API Services Made Easy With Node.js | REST library

I'm aware of ways to keep binary search trees balanced/self-balancing using rotations.

I am not sure if my case needs to be that complicated. I don't need to maintain any sorted order property like with self-balancing BSTs. I just have an ordinary binary tree that I may need to delete nodes or insert nodes. I need try to maintain balance in the tree. For simplicity, my binary tree is similar to a segment tree, and every time a node is deleted, all the nodes along the path from the root to this node will be affected (in my case, it's just some subtraction of the nodal values). Similarly, every time a node is inserted, all the nodes from the root to the inserted node's final location will be affected (an addition to nodal values this time).

What would be the most straightforward way to keep a tree such as this balanced? It doesn't need to be strictly as height balanced as AVL trees, but something like RB trees or maybe slightly less balanced is acceptable as well.

I am trying to get the hang of OOP in Python and currently writing a simple 2D finite element analysis program.

To begin with, I have created two classes called Nodes and Elements with the attributes shown in the code. The Elements class contains an attribute called length which has to be calculated based on the x and y coordinates of the start- and end nodes. These coordinates are contained within two instances of the Nodes class that are input by the user.

My first question is how can I pass these into the Elements class to be used by the calc_length method that computes the length of an element (a rod or a beam).

The second question which I cannot find an answer to is whether or not I need to declare the self_length attribute in the __init__() of the Elements class if it is calculated in the respective method?

I am asking a question stemming from this original post Heatmap with circles indicating size of population

I am trying to replicate this using my dataframe, however, my circles are non aligning to the plot. Secondary, I want to also create a legend which indicates the value relative to the size of circle.

Preface:

For this question to make sense, I need to describe my intent for the database. It will be used to store user data based on a grid of latitude and longitude sectors created by finding the floor value of the exact coordinates of the user when they sign up or log in. The reduced coordinate values are then concatenated, saved in shared preferences on the user's phone, and then set as the primary nodes in the database. This allows searching through the database to be restricted to just the sector the user is currently in which is required by a feature of the app. See the example the nodal layout of the database below:

The Problem:

This system works great, except for that when the user logs in on a new device (or if the shared preferences are lost) from outside the original sector, or from the previous sector, there is no way to know the previous or original sector value.

The Answer:

The answer I came up with is to search every single sector node in the database for the unique uid easily acquired by the following code:

Question: is it possible to have both plain and solid text font within the same label text specified in scale_fill_manual and scale_color_manual?

I have

Written with

Question: how to utilize n\ or similar to create two text-lines in x-axis label written with paste0

I have

As you can see, I currently have two independent lines on the x-axis as currently written with labels = paste0("LN: \nLND: ", paste0(seq(0,80,5)))).

I would like the numerical value yielded from seq(0,80,5) to appear in both lines, but with % written behind one the of texts.

Expected output:

Bonus question: is it possible to manually right/left/center align the two text lines I am trying to create on x-axis label?

Written with

My app prints a renderUI() comprising a tabsetPanel() containg a plot based on the sliderInput() input$n_fjernet from ui

Problem

The idea is, that renderUI() returns (1) a new sliderInput() called input$time_cali which reactively inserts the chosen slider-value into the ( ...) times=reactive({input$time_cali}), argument in plotCalibration, which currently has 60 written; and (2), the output$cali_plot should print/update reactively based on the input$time_cali-value from renderUI() stored in output$test

How can this be done?

Expected output

I tried times=reactive({input$time_cali}) and various variations of eventReactive()

Written with

I want to design a nodal class that I can then use for various types of trees, but I run into complications when I try to consider how to do it in such a way that I don't create unnecessary fields. For example, I have the following class:

I am completely new to shiny, which I am trying to learn by building this simple app.

It currently prints two different ggplots based on specific input-values after the actionButton() is clicked. However, I find the graphic a bit off when the two plots are printed next to each other.

Question: how can I integrate a Tabset that only prints when the actionButton() is clicked? The Tabset should contain two tabs - one with each plot.

My app currently looks like this

Which prints the two plots when the actionButton() is clicked:

I would like something like this to print:

and

In ui, I tried multiple variations of: