home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Tech Arsenal 1
/
Tech Arsenal (Arsenal Computer).ISO
/
tek-02
/
nrpas13.zip
/
SPLIE2.DEM
< prev
next >
Wrap
Text File
|
1991-04-29
|
1KB
|
52 lines
PROGRAM d3r12(input,output);
(* driver for routine SPLIE2 *)
CONST
m=10;
n=10;
TYPE
glnarray = ARRAY [1..n] OF real;
glmbyn = ARRAY [1..m,1..n] OF real;
VAR
i,j : integer;
x1x2 : real;
x1,x2 : glnarray;
y,y2 : glmbyn;
(*$I MODFILE.PAS *)
(*$I SPLINE.PAS *)
(*$I SPLIE2.PAS *)
BEGIN
FOR i := 1 to m DO BEGIN
x1[i] := 0.2*i
END;
FOR i := 1 to n DO BEGIN
x2[i] := 0.2*i
END;
FOR i := 1 to m DO BEGIN
FOR j := 1 to n DO BEGIN
x1x2 := x1[i]*x2[j];
y[i,j] := sqr(x1x2)
END
END;
splie2(x1,x2,y,m,n,y2);
writeln;
writeln('second derivatives from SPLIE2');
writeln('natural spline assumed');
FOR i := 1 to 5 DO BEGIN
FOR j := 1 to 5 DO write(y2[i,j]:12:6);
writeln
END;
writeln;
writeln('actual second derivatives');
FOR i := 1 to 5 DO BEGIN
FOR j := 1 to 5 DO BEGIN
x1x2 := x1[i]*x2[i];
y2[i,j] := 2.0*sqr(x1[i])
END;
FOR j := 1 to 5 DO write(y2[i,j]:12:6);
writeln
END
END.