SUBROUTINE D1INT2 (FI, ifi, jfi, f, if, jf, fx, fy, fxy, xi, yi, x, y, hx, hy,
                         za, zb, zc, zd)

ARGUMENTS

OUT

FI(IFI,JFI)   interpolated field                                     real

IN

IFI           x-dimension of array FI                                integer
JFI           y-dimension of array FI                                integer
F(IF,JF)      original field                                         real
IF            x-dimension of array F                                 integer
JF            y-dimension of array F                                 integer 
FX(IF,JF)     partial derivative of field F with respect to x        real
FY(IF,JF)     partial derivative with respect to y                   real
FXY(IF,JF)    partial second derivative with respect to x and y      real
XI(IFI)       x location of the values of the interpolated field FI  real
YI(JFI)       y location of the values of the interpolated field FI  real
X(IF)         x location of the values of the original field F       real
Y(JF)         y location of the values of the original field F       real
HX(IF)        grid-lengths defined by HX(i)=X(i+1)-X(i) i=1,IF-1     real
HY(JF)        grid-lengths defined by HY(i)=Y(i+1)-Y(i) i=1,JF-1     real
ZA(JFI)       working vector                                         real
ZB(JFI)       working vector                                         real
ZC(JFI)       working vector                                         real
ZD(JFI)       working vector                                         real
  (1,JFI)      (IFI,JFI)  
   +-------------+
   |             | 
   |             |  array FI 
   |             |
   |             |
   |             |
   +-------------+
  (1,1)       (IFI,1)
  (1,JF)      (IF,JF)  
   +-------------+
   |             | 
   |             |  arrays F, FX, FY and FXY
   |             |
   |             |
   |             |
   +-------------+
  (1,1)       (IF,1)

DESCRIPTION

EXAMPLE

SEE ALSO