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hydronavutil/cov2d.h
00001 #ifndef ORCANAVUTIL_COV2D_H 00002 #define ORCANAVUTIL_COV2D_H 00003 00004 #include <iostream> 00005 #include <assert.h> 00006 00007 namespace hydronavutil { 00008 00014 class Cov2d 00015 { 00016 00017 public: 00018 00019 Cov2d( double xx, double xy, double yy ) 00020 : xx_(xx),xy_(xy),yy_(yy) {} 00021 00022 double xx() const { return xx_; } 00023 double xy() const { return xy_; } 00024 double yy() const { return yy_; } 00025 00026 double &xx() { return xx_; } 00027 double &xy() { return xy_; } 00028 double &yy() { return yy_; } 00029 00030 // access like a matrix 00031 double m( int i, int j ) const 00032 { 00033 if ( i==0 && j==0 ) return xx_; 00034 else if ( i==0 && j==1 ) return xy_; 00035 else if ( i==1 && j==0 ) return xy_; 00036 else if ( i==1 && j==1 ) return yy_; 00037 else { assert( false&&"bad index" ); return 0; } 00038 } 00039 00040 private: 00041 00042 double xx_, xy_, yy_; 00043 00044 }; 00045 std::ostream &operator<<( std::ostream &s, const Cov2d &c ); 00046 00047 } 00048 00049 #endif
