la4j | Linear Algebra for Java | Math library
kandi X-RAY | la4j Summary
kandi X-RAY | la4j Summary
la4j (Linear Algebra for Java) is an open source and 100% Java library that provides Linear Algebra primitives (matrices and vectors) and algorithms. The la4j library was initially designed to be a lightweight and simple tool for passionate Java developers. It has been started as student project and turned into one of the most popular Java packages for matrices and vectors.
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- Returns the result of the singular values of the given matrix
- Eval of two numbers
- Returns the QR decomposition of the given matrix
- Decomposes a matrix
- Solves the coefficient matrix
- Gets a sub - vector of this vector
- Returns a column major matrix iterator
- Inserts the specified value at the specified index
- Calculates the determinant of this matrix
- Returns the dot product of this matrix
- Solve Ax = b
- Swaps the specified rows of this matrix
- Creates a vector iterator
- Returns a vector iterator for non - zero elements in this matrix
- Returns a vector iterator over the elements in the row i
- Returns a RowMajorMatrixIterator
- Returns the result of the Cholesky decomposition
- Solves the coefficients
- Returns a row - major matrix iterator
- Solve x = b
- Returns a copy of this matrix
- Returns a sparse matrix with the selected values
- Obtain a new matrix of this matrix
- Swaps the elements of the specified vector
- Returns the inverse of this matrix
- Returns a column - major matrix iterator
la4j Key Features
la4j Examples and Code Snippets
Lines of Code : 36
License : No License
Copyconst httpPost = (url, data, callback, err = console.error) => {
const request = new XMLHttpRequest();
request.open('POST', url, true);
request.setRequestHeader('Content-type', 'application/json; charset=utf-8');
request.onload = () => const httpGet = (url, callback, err = console.error) => {
const request = new XMLHttpRequest();
request.open('GET', url, true);
request.onload = () => callback(request.responseText);
request.onerror = () => err(request);
request.se const getMeridiemSuffixOfInteger = num =>
num === 0 || num === 24
? 12 + 'am'
: num === 12
? 12 + 'pm'
: num < 12
? (num % 12) + 'am'
: (num % 12) + 'pm';
getMeridiemSuffixOfInteger(0); // '12am'
getMeridiemSuffixOfI Community Discussions
Trending Discussions on la4j
QUESTION
I am trying to invoke a constructor in a class within a package using reflection. I am getting exception "java.lang.NoSuchMethodException:"
Below is the code.
...ANSWER
Answered 2019-Sep-10 at 00:16That's not how constructors are invoked with reflection. You need to invoke newInstance(...) directly from the Constructor object.
Given this class:
QUESTION
I am trying to catch constructor in a class and the constructor name is caught as "init" in aspectj. I want to print the constructor name and not as "init".
I tried to capture constructor call inside the class "LeastSquaresSolver_ESTest" and it printed the constructor name as "init" instead of the actual name of the constructor. The code is given below.
Code:
...ANSWER
Answered 2019-Aug-29 at 04:55 is just a symbolic name used to denote a constructor. Actually constructors have no names like methods. When you declare them in Java you use the class name instead. If this is what you want you can get it like this:
QUESTION
I am working on Matrix eigenvalue problem on estimating dominant eigenvalue using the power method where A is a n x n real matrix. I'm using la4j linear algebra library. The algorithm uses below steps
- Normalize x0 to construct a unit vector x1=x0/euclidean norm(x0)
For k=1 to kmax
- Find x[k+1]=A[x[k]]
- Calculate alpha[k+1]=transpose(x[k])*x[k+1]
- Normalize x[k+1] and do not rename x[k+1]=x[k+1]/euclidean norm(x[k+1])
- Terminating condition: if |alpha[k+1]-alpha[k]| < tolerance , stop Otherwise, increment k to k+1 and go to step 2
Here is my class. I would like to convert dominantEigenV to functional style using java 8. Any help would be appreciated.
...ANSWER
Answered 2018-Nov-19 at 21:03First let me put your imperative method again so we can compare the two
QUESTION
I am working with Sparse Matrix in my project. To build a Sparse Matrix I am using Universal Java Matrix Package. I add all the dependency in my pom.xml file.My pom.xml file is like that.
...ANSWER
Answered 2018-Jul-12 at 07:58remove:
QUESTION
It's a bit hard to phrase my question. I'm struggling a lot with using libraries in java currently and often are not really sure how to efficiently use them. In theory I know what an interface and an abstract class is but it seems that in practice these things are hard for me to use. So, to be more specific, as an example, in the moment I'm using a CCS matrix from the la4j library. I now want to iterate over it (the rows and every entry in each of these rows) and want to use the library for it but I find only abstract iterators (e.g. the RowMajorMatrixIterator). In general: I don't know what to do with abstract classes (or interfaces) from libraries. Specifically in this moment and as a typical instance of my problem: If I have this abstract iterator, how do I actually use it (for my CCS Matrix)? Every help is appreciated!
...ANSWER
Answered 2017-Sep-29 at 12:06You get the iterators from the matrices you created beforehand: the class Matrix defines a method rowMajorIterator(), for example, so you can do
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install la4j
You can use la4j 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 la4j 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 .
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