protected DoubleMatrix2D getGradFi ( DoubleMatrix1D X ) { DoubleMatrix2D ret = F2 . make ( request . getFi ( ) . length , X . size ( ) ) ; double [ ] x = X . toArray ( ) ; for ( int i = 0 ; i < request . getFi ( ) . length ; i ++ ) { ret . viewRow ( i ) . assign ( request . getFi ( ) [ i ] . gradient ( x ) ) ; } return ret ; }
Inequality functions gradients values at X .