d3js | Experiments with D3.js | Data Visualization library

Description:

I am playing around with Observable Plot an really like how easy it is to set up simple plots.

Now I have a little "more advanced" chart that I want to plot and need help.

In my data, I have multiple temp (temperature) readings recorded at a certain timestamp. Each reading comes from a sensor, and each sensor is attached to a certain device (multiple sensors (e.g., 1-3) can be attached to a single device (e.g., 2)). Thus, one data point might look like the following (see bottom script for a full minimal workabel example):

I have a CakePHP4 App where I create a D3JS WorldMap in a

First of all, I want to animate the steps of Quick Sort, to learn its behavior.

The Quick Sort algorithm is fine (of course) from a reference book.

But I can only view only the start and end of the Quick Sort movement. Let me know how to view every single step in Quick Sort by d3.js. (I'm a JS beginner.)

My temporary codes are as below. Thnx in advance.

index.html:

[updated to now use drag- but drag isn't functioning 100% correct, so help still needed]

I'm trying to use d3 to zoom and pan an svg a particular way. I want the user to have to use the zoom in/zoom out buttons to zoom, but then be able to pan with mouse drag. I also want the panning to be restricted to a boundary. It is the same way the NY Times has it set up on their covid maps -- https://www.nytimes.com/interactive/2021/us/covid-cases.html (scroll to the Hot Spots map)

I have the zooming within a boundary working, and I've disabled free zooming by commenting out .call(zoom). I am just zooming with the buttons and using .call(zoom.transform, initialTransform). I'm calling drag to control the panning, but it jumps a bit and isn't the smooth interaction I'd like. It also seems like it might be effecting zoom.

Any pointers or help very much appreciated.

I would like to draw a ellipse shape by svg path. I use below code but the shape looks like a round corner rectangle. How can I adjust the parameter to get a eclipse path!

I have the initial state of tree diagram that I'm building, with collapse animation and custom node design but whatever I try to make the tree vertical instead of horizontal I mess something else (animation not working well, the lines are wrong and other problems).

I'm trying to visualize a merkle tree where a vertical display is more intuitive. unfortunately I dont have strong background in front-end or deep understanding of d3 lib.

Here is the code:

My elements are created from data in a CSV file that updates every 1 minute.

I'm trying to update these elements as follows:

1. Remove those whose data is no longer in the CSV file
2. Create new ones that appeared in the CSV file
3. Keep without edit those that still exist in the CSV file

The CSV file looks like this:

I'm filtering out a subset of US counties with D3 and topojson. I can successfully filter out the counties and draw them to an SVG element, but how do I change the map bounds to fit the new selected counties? It's rendering the map as if the bounds were all US counties vs. only the filtered ones.

I'm pretty new to d3js and trying to understand the difference between using data and datum to attach data to elements. I've done a fair bit of reading the material online and I think I theoretically understand what's going on but I still lack an intuitive understanding. Specifically, I have a case where I'm creating a map using topojson. I'm using d3js v7.

In the first instance, I have the following code to create the map within a div (assume height, width, projection etc. setup correctly):