t-digest | new data structure for accurate on-line accumulation

by tdunning Java Version: t-digest-3.2 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | t-digest Summary

t-digest is a Java library typically used in Manufacturing, Utilities, Energy, Utilities applications. t-digest has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.

A new data structure for accurate on-line accumulation of rank-based statistics such as quantiles and trimmed means. The t-digest algorithm is also very friendly to parallel programs making it useful in map-reduce and parallel streaming applications implemented using, say, Apache Spark. The t-digest construction algorithm uses a variant of 1-dimensional k-means clustering to produce a very compact data structure that allows accurate estimation of quantiles. This t-digest data structure can be used to estimate quantiles, compute other rank statistics or even to estimate related measures like trimmed means. The advantage of the t-digest over previous digests for this purpose is that the t-digest handles data with full floating point resolution. With small changes, the t-digest can handle values from any ordered set for which we can compute something akin to a mean. The accuracy of quantile estimates produced by t-digests can be orders of magnitude more accurate than those produced by alternative digest algorithms in spite of the fact that t-digests are much more compact, particularly when serialized. In summary, the particularly interesting characteristics of the t-digest are that it.

Support

Quality

Security

License

Reuse

Support

t-digest has a medium active ecosystem.

It has 1808 star(s) with 227 fork(s). There are 65 watchers for this library.

It had no major release in the last 6 months.

There are 28 open issues and 92 have been closed. On average issues are closed in 344 days. There are 10 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of t-digest is t-digest-3.2

Quality

t-digest has 0 bugs and 0 code smells.

Security

t-digest has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

t-digest code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

t-digest is licensed under the Apache-2.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

t-digest releases are not available. You will need to build from source code and install.

Deployable package is available in Maven.

Build file is available. You can build the component from source.

Installation instructions are not available. Examples and code snippets are available.

It has 8745 lines of code, 489 functions and 59 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed t-digest and discovered the below as its top functions. This is intended to give you an instant insight into t-digest implemented functionality, and help decide if they suit your requirements.

Compute the cumulative value of the CDF at x
Create an iterator over the centroid
Returns the least node greater than the given node
Returns the previous node
Adds a value to the stream
Reset the input
Compares two histograms
Demonstrates how to compare two distributions
Computes the cumulative likelihood of a given value
Merge the incoming centroids
Serializes this sketch
Setup the histogram
Initialize data structures
Setup the data structure
Sets up the distribution
Returns a collection of centroids
Return the floor of the subtree rooted at the given sum
Writes the histogram to a ByteBuffer
Deserialization
Serialize the histogram
Checks if a partition step is done
Returns the ks score
Returns the quantile for the data point
Reads a histogram from a byte buffer
Compute quantile for a given query point
Extracts a MergingDigest from a byte buffer

Get all kandi verified functions for this library.

t-digest Key Features

No Key Features are available at this moment for t-digest.

t-digest Examples and Code Snippets

No Code Snippets are available at this moment for t-digest.

Community Discussions

Trending Discussions on t-digest

Deleting a value from database based on data coming sent from a form - Django

curl to fetch with digest flag

How does docker know the digest for each blob when pulling from registry?

Why am I getting a CORS error with jQuery but not with XMLHttpRequest?

CURL script containing AWK fails over SSH to print Docker Image Digest

Docker private registry insufficient_scope when trying to delete image

What is the difference between docker image etag, digest, manifest and blob?

Error building project with make command, use of undeclared identifier '__compar_fn_t'

Python base64 hash with same output as C# Script

Problems with Drive API in python

QUESTION

Deleting a value from database based on data coming sent from a form - Django

Asked 2022-Mar-04 at 21:20

I am trying to implement newsletter/email subscription for my project. I created a model which only stores the email and the timestamp and uses SendGrid to send emails to the users who subscribed.

I want to include an unsubscribe button inside the emails I send them. When the user clicks unsubscribe link in the mail it appends the id of the value in db to the url and redirects to cancelsub.html where I am accessing it.

In cancelsub.html I have a form with a submit button which when a user clicks should delete the value from db. It is not working for some reason.

Models.py--

...

ANSWER

Answered 2022-Mar-04 at 21:20

I understand that the URL that you send on the email is something like this: http://mywebsite.com/unsubscribe/?9

So you get the "9" with the javascript code. You don't need the javascript if you give a name to your value like this: http://mywebsite.com/unsubscribe/?user_id=9

Now, you can just doing this:

Source https://stackoverflow.com/questions/71356543

QUESTION

curl to fetch with digest flag

Asked 2022-Feb-19 at 15:18

There has been other questions on the subject, but nothing seems working for me.
I have a functional CURL, but I want to translate to JS (with Node).

CURL ...

ANSWER

Answered 2022-Feb-19 at 13:04

PHP

You need to specify that it's a digest:

Source https://stackoverflow.com/questions/71148572

QUESTION

How does docker know the digest for each blob when pulling from registry?

Asked 2022-Jan-04 at 13:36

OCI spec

From the spec you can:

Pull manifests using the endpoint /v2//manifests/
Pull blobs using the endpoint /v2//blobs/

Proof of Concept

Used a reverse proxy to catch the HTTP requests made by the docker client when pulling a docker image from the registry, here is the output:

Get a valid token and make a HEAD request to verify that the manifest exists.

Notice how we get back the image Id on Docker-Content-Digest header, as specified in the standard.

After validating that the manifest exists just requests a token for each of the layers and it's data:

Question

Where in between step 1 and 2 docker knows the digest for each layer just by making a HEAD request to the manifest?

...

ANSWER

Answered 2022-Jan-04 at 13:36

The problem is that Docker applies caching and it doesn't get removed using the command docker rm . Here is the output of a non cached image:

It follows the steps:

HEAD to check if there is such manifest
Gets the manifest
Gets the manifest for my platform (amd64)
Gets the first layer

Source https://stackoverflow.com/questions/70571761

QUESTION

Why am I getting a CORS error with jQuery but not with XMLHttpRequest?

Asked 2021-Dec-30 at 14:05

We are facing weird issue while making a Cross domain API call from from UI code base where one way of Ajax request (vanilla JS) works however another doesn't (jQuery). Any pointer will help.

Cross Domain Success call

...

ANSWER

Answered 2021-Dec-30 at 13:57

Problem(s) The two requests are not equivalent

For the one sent via XHR, you're only setting the content type of the response:

Source https://stackoverflow.com/questions/70531105

QUESTION

CURL script containing AWK fails over SSH to print Docker Image Digest

Asked 2021-Dec-12 at 18:50

The following curl script fails over ssh,

...

ANSWER

Answered 2021-Dec-12 at 18:50

You have three sets of double quotes nested inside each other. They are causing havoc with the bash parsing. If you want the quotes inside transported to the far end of the SSH tunnel you need to escape them with backslashes...

ssh is probably only seeing the content inside the first set of quotes:

Source https://stackoverflow.com/questions/70294520

QUESTION

Docker private registry insufficient_scope when trying to delete image

Asked 2021-Oct-19 at 19:37

I'm trying to delete an image tag from my private docker registry mydockerregistry.com within a bash script. Authentication is done through registry web mydockerregistry.com:8080, so I get the token first using

...

ANSWER

Answered 2021-Oct-18 at 22:36

Assuming that authentication is not the real issue (you can probably push and pull on that registry), did you enable deletes which are disabled by default?

https://docs.docker.com/registry/configuration/#delete

Also note that once you delete manifests, the filesystem layers are still part of the registry, so your disk space consumption will not go down unless you run garbage collection.

https://docs.docker.com/registry/garbage-collection/

Source https://stackoverflow.com/questions/69622925

QUESTION

What is the difference between docker image etag, digest, manifest and blob?

Asked 2021-Sep-29 at 12:15

I work with docker and private registries and I wonder what is the difference between the following sha256 number that are associated with a docker image:

Manifest
Etag
Docker-Content-Digest
blob

...

ANSWER

Answered 2021-Sep-29 at 12:15

Manifest - This is a list of all the objects needed for a particular image:tag. From https://docs.docker.com/registry/spec/api/#manifest - "The contents can be used to identify and resolve resources required to run the specified image".
Etag - This in an HTTP feature that helps cache behavior of user-agents. See https://en.wikipedia.org/wiki/HTTP_ETag for more details.
Docker-Content-Digest - the content digest is a checksum of the contents of the object in question. This object could be a manifest or a blob. Checksum verification helps docker make sure that it successfully downloaded a given object. This also enables content addressability so you can pull an image by the digest and be more confident that you are getting the correct version of the image. See https://docs.docker.com/registry/spec/api/#content-digests
blob - essentially an image layer that can be referred to by a digest. See https://docs.docker.com/registry/spec/api/#blob for more details about the operations on blob objects at the API level.

Source https://stackoverflow.com/questions/69375684

QUESTION

Error building project with make command, use of undeclared identifier '__compar_fn_t'

Asked 2021-Sep-15 at 07:46

I'm trying to build RedisBloom and after running the make command I get the following error.

...

ANSWER

Answered 2021-Sep-15 at 07:46

The RedisBloom project uses an implementation detail (__compar_fn_t) to cast the function signature of cmpHeapBucket from a shortcut-signature to the proper signature. Relying on such implementation details is bad and tends to not be very portable.

I recommend that you download the newest version of RedisBloom. I made a patch to it that has now been merged to master which does the following:

Fix in src/topk.c:

Source https://stackoverflow.com/questions/69184433

QUESTION

Python base64 hash with same output as C# Script

Asked 2021-Sep-01 at 23:32

I'm working with a vendor who owns an API. In order to call the API, they require us to hash the whole body of the request and add it to a Content-Digest digest header key. Content-Digest: SHA256=. They have provided us with a RSA Private Key along with a linq LINQPad file written in C#. This script is what outputs the base64 encoded hash that goes into the Content-Digest.

The problem is, I don't know any C# and the application that we are going to be using this API for is written in Python. What I'm looking for is a way to output the exact same formatted hash in a Python Script.

This is the C# Code they provided:

...

ANSWER

Answered 2021-Sep-01 at 20:55

I hope this gets you into the right direction.

Please note that I'm generating a random private key, just in order to have a working example. This generates output of 344 characters, just like you'd expect:

Source https://stackoverflow.com/questions/69019808

QUESTION

Problems with Drive API in python

Asked 2021-Aug-17 at 19:40

I made an App with Python and Streamlit and I add Drive API. I have all the code as I found on the official Google page and at first it works.

I have a .csv at google drive and as I cannot save files in Heroku I save it in Drive and then download it every time I need it in the app. At first the Dowload code works, and the .csv is dowloaded correctly but after some uploads and dowloads the download code shows this error

...

ANSWER

Answered 2021-Aug-17 at 19:40

When you get a response from the service, it's always a good idea to first check the response code, before you try use the data you expect to have in that response.

If you have a look at the response objects, you can see that it's when it works, and when it doesn't.

403 means "Forbidden". The server doesn't return to you the data you expect, that's why there is no content-disposition header, and your regex fails.

Source https://stackoverflow.com/questions/68821984

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install t-digest

You can download it from GitHub, Maven.
You can use t-digest like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the t-digest component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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