Documentation API of the 'org.apache.commons.math3.linear.RealVector' Java class

Class RealVector

  • Direct Known Subclasses:
    ArrayRealVector, SparseRealVector

    public abstract class RealVectorextends Object
    Class defining a real-valued vector with basic algebraic operations.

    vector element indexing is 0-based -- e.g., getEntry(0) returns the first element of the vector.

    The code map and mapToSelf methods operate on vectors element-wise, i.e. they perform the same operation (adding a scalar, applying a function ...) on each element in turn. The map versions create a new vector to hold the result and do not change the instance. The mapToSelf version uses the instance itself to store the results, so the instance is changed by this method. In all cases, the result vector is returned by the methods, allowing the fluent API style, like this:

       RealVector result = v.mapAddToSelf(3.4).mapToSelf(new Tan()).mapToSelf(new Power(2.3)); 

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