Documentation API of the 'cern.colt.matrix.impl.DenseDoubleMatrix3D' Java class

Class DenseDoubleMatrix3D

  • All Implemented Interfaces:
    Serializable, Cloneable

    public class DenseDoubleMatrix3Dextends DoubleMatrix3D
    Dense 3-d matrix holding double elements.First see the package summary and javadoc tree view to get the broad picture.


    Internally holds one single contigous one-dimensional array, addressed in (in decreasing order of significance): slice major, row major, column major.Note that this implementation is not synchronized.

    Memory requirements:

    memory [bytes] = 8*slices()*rows()*columns().Thus, a 100*100*100 matrix uses 8 MB.

    Time complexity:

    O(1) (i.e. constant time) for the basic operationsget, getQuick, set, setQuick and size,

    Applications demanding utmost speed can exploit knowledge about the internal addressing.Setting/getting values in a loop slice-by-slice, row-by-row, column-by-column is quicker than, for example, column-by-column, row-by-row, slice-by-slice.Thus

       for (int slice=0; slice < slices; slice++) {          for (int row=0; row < rows; row++) {             for (int column=0; column < columns; column++) {                        matrix.setQuick(slice,row,column,someValue);                 }                            }   }
    is quicker than
       for (int column=0; column < columns; column++) {          for (int row=0; row < rows; row++) {             for (int slice=0; slice < slices; slice++) {                        matrix.setQuick(slice,row,column,someValue);                 }          }   }
    See Also:
    Serialized Form

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