Package ucar.ma2

Class MAVector

  • public class MAVector
extends Object
    Abstraction for vector operations. A vector is a rank-1 Array. All operations done in double precision

    • Constructor Detail

      • MAVector

        public MAVector​(double[] values)
        Create an MAVector out of a double array

      • MAVector

        public MAVector​(int nelems)
        Create an MAVector of the given length.

      • MAVector

        public MAVector​(Array a)
        Create an MAVector using the given rank-1 array.
        Parameters:
        a - rank-1 array
        Throws:
        IllegalArgumentException - is a is not rank 1

    • Method Detail

      • getNelems

        public int getNelems()

      • getDouble

        public double getDouble​(int i)

      • setDouble

        public void setDouble​(int i,
                      double val)

      • copy

        public MAVector copy()
        Create a new MAVector that is the same as this one, with a copy of the backing store.

      • cos

        public double cos​(MAVector v)
        Cos between two vectors = dot(v) / norm() * norm(v)
        Parameters:
        v - cosine with this vector
        Returns:
        double result: cos between this and v
        Throws:
        IllegalArgumentException - if nelems != v.getNelems().

      • dot

        public double dot​(MAVector v)
        Dot product of 2 vectors
        Parameters:
        v - dot product with this vector
        Returns:
        double result: dot product
        Throws:
        IllegalArgumentException - if nelems != v.getNelems().

      • norm

        public double norm()
        Get the L2 norm of this vector.
        Returns:
        double norm

      • normalize

        public void normalize()
        Normalize this vector, so it has norm = 1.0.