        SUBROUTINE TRIM(XOUT,YOUT,XBOUND,XOK,YOK)
C
C  IN ORDER TO RETAIN AS MUCH ACCURACY AS POSSIBLE WHEN ONE OF
C  THE END POINTS IS CLOSE TO THE MACHINE BOUND, WE WILL ALWAYS
C  CALCULATE THE Y INTERCEPT BY SUBTRACTION FROM THE POINT
C  NEAREST THE XBOUND
C
        BASE = (YOUT-YOK)/(XOUT-XOK)
        DELTA1 = XBOUND-XOUT
        DELTA2 = XBOUND - XOK
        IF (ABS(DELTA1).GT.ABS(DELTA2)) GO TO 1
        YOUT = YOUT + DELTA1*BASE
        GO TO 2
1       YOUT = YOK + DELTA2*BASE
2       XOUT = XBOUND
        RETURN
        END
