gonum | numeric libraries for the Go programming language | Math library

 by   gonum Go Version: v0.13.0 License: BSD-3-Clause

kandi X-RAY | gonum Summary

kandi X-RAY | gonum Summary

gonum is a Go library typically used in Utilities, Math applications. gonum has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Gonum is a set of numeric libraries for the Go programming language. It contains libraries for matrices, statistics, optimization, and more

            kandi-support Support

              gonum has a medium active ecosystem.
              It has 6622 star(s) with 511 fork(s). There are 123 watchers for this library.
              There were 1 major release(s) in the last 12 months.
              There are 220 open issues and 379 have been closed. On average issues are closed in 148 days. There are 32 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of gonum is v0.13.0

            kandi-Quality Quality

              gonum has no bugs reported.

            kandi-Security Security

              gonum has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              gonum is licensed under the BSD-3-Clause License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              gonum releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of gonum
            Get all kandi verified functions for this library.

            gonum Key Features

            No Key Features are available at this moment for gonum.

            gonum Examples and Code Snippets

            No Code Snippets are available at this moment for gonum.

            Community Discussions


            Finding all cycles in a Directed Multigraph with self edges
            Asked 2021-Mar-10 at 08:50

            Is there any implementation of an algorithm finding all the cycles in a directed multigraph with self edges in Golang ? I found out that the Johnson's algo is the best solution for directed graphs and an implementation is given in gonum but it works only on directed graphs (not multigraphs) and it does not support self edges (actually directed graphs in gonum don't support self edges). Is there any short/clever hack that I can do in gonum to make johnson's work for directed multigraphs with self edges ? Or is there any other implementation in Golang ?

            One thing that can be done is to create a dummy node between self edges and the duplicate edges between same pair of nodes. This will remove all self edges and graph will be a directed one and I can use the Johnson's here. But is there any better way ?



            Answered 2021-Mar-10 at 08:50
            • self edges : you just have to scan each node of your graph and check if there is a self edge. If there is : add X -> X to the list of cycles

            • multi graph : the first algorithm will produce paths as a sequence of vertices X1 -> X2 -> X3 -> .... When you have this list, iterate over all the possible edges going from X1 to X2, then all the possible edges going from X2 to X3, etc ...

            • "clever" hack : from your multigraph G, create a new graph G2, where the edges of G also appear as vertices :

            Source https://stackoverflow.com/questions/66527056


            I've made two codes but I can't interpret why these two are different and produce different results
            Asked 2020-Jul-18 at 09:46

            The first code that I made is this...



            Answered 2020-Jul-18 at 09:46


            How do I make a for loop that scans through JSON in F#
            Asked 2020-Apr-19 at 18:31

            Using F# I am trying to scan through a JSON file and compare its arrays against a single array of (randomly generated) numbers. The formatting for the json is:


            etc for 121 entries. I'm currently trying Json.NET. My problems are:

            • How can I import a local file with Json.NET?

            • How would I set about making a simple call of the json key that'd return it's array value that's fit to run it through a for loop?

            Here is my code of how far I've gotten:



            Answered 2020-Apr-19 at 18:31

            f# is a statically typed language - we simply often don't notice because of its excellent type inferencing. But when deserializing from a JSON file, before writing any code, it is useful to determine whether the JSON has a fixed schema, and if so, create or choose an appropriate data model to which the JSON can be mapped automatically.

            In your case, your JSON looks like:

            Source https://stackoverflow.com/questions/61288900


            JSON Serialization of external type issue - convert map[string]interface{} item to int
            Asked 2020-Apr-01 at 10:30

            I want to serialize the type Dense of package gonum.org/v1/gonum/mat. Because of the fact, that I cannot implement methods for external types, I created a type



            Answered 2020-Apr-01 at 10:30

            if you check the docs of Unmarshal. You will find that the know type of Numbers in Unmarshal is float64

            To unmarshal JSON into an interface value, Unmarshal stores one of these in the interface value:

            Source https://stackoverflow.com/questions/60965125


            Installing gota package in go workspace
            Asked 2019-Nov-26 at 10:40

            I'm writing this away from my code so fingers crossed.

            I've recently started learning Go from a Python background. I've set up my workspace (Linux Mint OS) so:

            GOPATH=$HOME/go GOROOT=/usr/local/go

            Where under $HOME i have a dir called go and 3 subdirs called src, bin and pkg.

            I wanted to mess around with some dataframes (I use pandas a lot in Python) so I tried to install gota from github. Only their recommended install command:



            Answered 2019-Nov-26 at 10:40

            The authors of the repository must have migrated to a different repository.

            The official repository of these packages is: github.com/go-gota/gota

            Source https://stackoverflow.com/questions/59047666


            How to get P value of correlation coefficient
            Asked 2019-Sep-19 at 18:34

            I am trying to use Go for simple statistics.

            I am using this package to get correlation coefficient.

            It works well but it does not give P value of the correlation. Other functions in this package are given above on the same page: https://godoc.org/gonum.org/v1/gonum/stat

            Similarly, this package also has correlation function which returns coefficient but not P value.

            How can I find P value of correlation coefficient with any of these packages?

            Edit: I had posted this question at crossvalidated (stats.stackexchange.com) where it was suggested that it is a programming question.



            Answered 2019-Sep-19 at 18:34

            It looks like you'll need to calculate it manually, and there are multiple ways to do this, depending on assumptions you can make about your data. If you really go this route, I'd strongly encourage you to also test against existing implementations - for example R's cor.test - to ensure that you're not doing something wrong.

            Normality Assumption

            If the observed values are each approximately normal, then the value

            where r is the calculated correlation coefficient and n is the number of observations, will follow Student's t distribution with n-2 degrees of freedom. Hence, you can use Student's t distribution as implemented in GoNum to compute the p-value. This is what cor.test in R does.

            It should go something like (please note I've never used Go):

            Source https://stackoverflow.com/questions/57844443


            How to deal with "import cycle not allowed" while trying to install gonum?
            Asked 2019-Apr-17 at 15:34

            I'd like to use the gonum libraries for go in order to experiment with some neural network stuff but I cannot go past the install process...

            I'm running the command found on the official gonum website :



            Answered 2019-Apr-17 at 15:34

            As Adrian told in the comments, the issue was that the go version I was running was too old for gonum to install correctly. This was due to the fact that the go-golang package installed on my computer via apt-get was giving me the 1.6 version of go. By removing the package and making sure I had a recent go release installed on my computer I managed to install gonum.

            Source https://stackoverflow.com/questions/55730279


            Gonum throws bad region panic when using an embedded struct
            Asked 2019-Mar-31 at 21:21

            I am using gonum to perform a few linear algebra calculations. After extending the original mat.VecDense struct I am getting a "bad region: identical" panic when applying a method on itself. This error does not occur when I am using the original setup gonum provides.

            Here is my implementation:



            Answered 2018-Aug-21 at 18:35

            In Golang it is described for promoted methods as

            Promoted fields act like ordinary fields of a struct except that they cannot be used as field names in composite literals of the struct.

            Given a struct type S and a defined type T, promoted methods are included in the method set of the struct as follows:

            • If S contains an embedded field T, the method sets of S and *S both include promoted methods with receiver T. The method set of *S also includes promoted methods with receiver *T.
            • If S contains an embedded field *T, the method sets of S and *S both include promoted methods with receiver T or *T.

            The problem is that you are passing pointer type arguments to AddVec function. But you are using pointer type fields in second case.

            Source https://stackoverflow.com/questions/51950841


            Numpy: How does np.abs actually work under the hood?
            Asked 2019-Feb-27 at 17:28

            I'm trying to implement my own absolute function for gonum dense vectors in Go. I'm wandering if there's a better way of getting the absolute value of an array than squaring and then square rooting?

            My main issue is that I've had to implement my own element wise Newtonian square-root function on these vectors and there's a balance between implementation speed and accuracy. If I could avoid using this square-root function I'd be happy.



            Answered 2019-Feb-26 at 11:03

            NumPy source code can be tricky to navigate, because it has so many functions for so many data types. You can find the C-level source code for the absolute value function in the file scalarmath.c.src. This file is actually a template with function definitions that are later replicated by the build system for several data types. Note each function is the "kernel" that is run for each element of the array (looping through the array is done somewhere else). The functions are always called _ctype_absolute, where is the data type it applies to and is generally templated. Let's go through them.

            Source https://stackoverflow.com/questions/54882191


            How do I read an HDF5 attribute which could be one of two different data types, using the GO language?
            Asked 2019-Feb-21 at 21:42

            I am porting an existing C++ application to GO as part of an evaluation project. As part of this I need to read two Dataset attributes which in some files are stored as a double and in some as a float. The C++ code I use to handle this looks like the following (we are using the libhdf5-cpp-100 on Debian Linux).



            Answered 2019-Feb-21 at 21:42

            I have confirmed my suspicions and now have a proper answer. The essential problem is that there was an error in my use of the C++ API (which would have led to only writing 1/2 of a double in certain cases) and I was essentially trying to repeat that error in GO. In fact, the solution is very simple.

            The attribute type that is passed into the attribute read method, is not the type of the attribute, it is the type that you want it converted to when stored in memory. That means that my C++ code should be much simpler as there is no need to check the attribute type, nor to static_cast it to the result. To read and store the attribute value, relying on HDF5 to perform the conversion and for a suitable exception to be thrown if the attribute is not convertible to a double, is as simple as

            Source https://stackoverflow.com/questions/54810245

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


            No vulnerabilities reported

            Install gonum

            The core packages of the Gonum suite are written in pure Go with some assembly. Installation is done using go get.
            The Gonum packages use a variety of build tags to set non-standard build conditions. Building Gonum applications will work without knowing how to use these tags, but they can be used during testing and to control the use of assembly and CGO code.
            safe — do not use assembly or unsafe
            bounds — use bounds checks even in internal calls
            noasm — do not use assembly implementations
            tomita — use Tomita, Tanaka, Takahashi pivot choice for maximimal clique calculation, otherwise use random pivot (only in topo package)


            Gonum supports and tests using the gc compiler on the two most recent Go releases on Linux (386, amd64 and arm64), macOS and Windows (both on amd64).
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
          • HTTPS


          • CLI

            gh repo clone gonum/gonum

          • sshUrl


          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link