Package org.ejml.dense.row.misc

Class TransposeAlgs_FDRM

  • public class TransposeAlgs_FDRM
extends java.lang.Object
    Low level transpose algorithms. No sanity checks are performed. Take a look at BenchmarkTranspose to see which one is faster on your computer.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void block​(org.ejml.data.FMatrix1Row A, org.ejml.data.FMatrix1Row A_tran, int blockLength)
      Performs a transpose across block sub-matrices.
      static void square​(org.ejml.data.FMatrix1Row mat)
      In-place transpose for a square matrix.
      static void standard​(org.ejml.data.FMatrix1Row A, org.ejml.data.FMatrix1Row A_tran)
      A straight forward transpose.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • TransposeAlgs_FDRM

        public TransposeAlgs_FDRM()

    • Method Detail

      • square

        public static void square​(org.ejml.data.FMatrix1Row mat)
        In-place transpose for a square matrix. On most architectures it is faster than the standard transpose algorithm, but on most modern computers it's slower than block transpose.
        Parameters:
        mat - The matrix that is transposed in-place. Modified.

      • block

        public static void block​(org.ejml.data.FMatrix1Row A,
                         org.ejml.data.FMatrix1Row A_tran,
                         int blockLength)
        Performs a transpose across block sub-matrices. Reduces the number of cache misses on larger matrices. *NOTE* If this is beneficial is highly dependent on the computer it is run on. e.g: - Q6600 Almost twice as fast as standard. - Pentium-M Same speed and some times a bit slower than standard.
        Parameters:
        A - Original matrix. Not modified.
        A_tran - Transposed matrix. Modified.
        blockLength - Length of a block.

      • standard

        public static void standard​(org.ejml.data.FMatrix1Row A,
                            org.ejml.data.FMatrix1Row A_tran)
        A straight forward transpose. Good for small non-square matrices.
        Parameters:
        A - Original matrix. Not modified.
        A_tran - Transposed matrix. Modified.