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SUBROUTINE QHSG

PURPOSE
   TO COMPUTE THE VECTOR OF INTEGRAL VALUES FOR A GIVEN
   GENERAL TABLE OF ARGUMENT, FUNCTION, FIRST DERIVATIVE,
   AND SECOND DERIVATIVE VALUES.

USAGE
   CALL QHSG (X,Y,FDY,SDY,Z,NDIM)

DESCRIPTION OF PARAMETERS
   X	  - THE INPUT VECTOR OF ARGUMENT VALUES.
   Y	  - THE INPUT VECTOR OF FUNCTION VALUES.
   FDY	  - THE INPUT VECTOR OF FIRST DERIVATIVE.
   SDY	  - THE INPUT VECTOR OF SECOND DERIVATIVE.
   Z	  - THE RESULTING VECTOR OF INTEGRAL VALUES. Z MAY BE
	    IDENTICAL WITH X,Y,FDY OR SDY.
   NDIM   - THE DIMENSION OF VECTORS X,Y,FDY,SDY,Z.

REMARKS
   NO ACTION IN CASE NDIM LESS THAN 1.

SUBROUTINES AND FUNCTION SUBPROGRAMS REQUIRED
   NONE

METHOD
   BEGINNING WITH Z(1)=0, EVALUATION OF VECTOR Z IS DONE BY
   MEANS OF HERMITEAN SIXTH ORDER INTEGRATION FORMULA.
   FOR REFERENCE, SEE
   R.ZURMUEHL, PRAKTISCHE MATHEMATIK FUER INGENIEURE UND
   PHYSIKER, SPRINGER, BERLIN/GOETTINGEN/HEIDELBERG, 1963,
   PP.227-230.