question: public double [ ] subseriesByCopy ( double [ ] series , int start , int end ) throws IndexOutOfBoundsException { if ( ( start > end ) || ( start < 0 ) || ( end > series . length ) ) { throw new IndexOutOfBoundsException ( "Unable to extract subseries, series length: " + series . length + ", start: " + start + ", end: " + String . valueOf ( end - start ) ) ; } return Arrays . copyOfRange ( series , start , end ) ; }
target:  Extract subseries out of series.