Adams Basic Package > Adams Solver > Welcome to the FORTRAN Version of Adams Solver > Adams Solver (FORTRAN) Commands > SPLINE

SPLINE

The SPLINE command modifies or lists an existing SPLINE statement. You can change the values of the SPLINE data, and in the process increase or decrease the number of X data or the number of curve families. You cannot change the extrapolation method, nor can you read data from a file.
■For information on the corresponding statement, see the SPLINE statement.
■For information on the corresponding subroutine, see the SPLINE_READ subroutine.

Format

SPLINE/id
, X=x1, x2, x3, x4 [, . . . , xn]
, Y=y1, y2, y3, y4 [, . . . , yn]
, LIST
or
SPLINE/id
, X=x1, x2, x3, x4 [, . . . , xn]
, Y=z1, y11, y12, y13, y14 [, . . . ,y1n]
, Y=z2, y21, y22, y23, y24 [, . . . ,y2n]
, Y=z3, y31, y32, y33, y34 [, . . . ,y4n]
, Y=z4, y41, y42, y43, y44 [, . . . ,y4n]
[, . . . , Y=zm, ym1, ym2, ym3, ym4,[, . . . ,ymn]]
, LIST
 
[ ] Optionally select the item

Arguments

 
X=x1,x2,x3,x4[ , . . . , xn]
■Specifies at least four x values. The maximum number of x values, n, depends on whether you specify a single curve or a family of curves.
■Values must be constants; Adams Solver (FORTRAN) does not allow expressions.
■Values must be in increasing order: x1< x2 < x3, and so on.
Y=y1,y2,y3,y4 [ , . . . , yn]
■Approximates a single curve by specifying the corresponding y value: y1,y2,y3,y4[, . . . ,yn] for each x value.
■Values must be constants; Adams Solver (FORTRAN) does not allow expressions.
Y=z1,y11,y12,y13,y14 [ , . . . , y1n]
,Y=z2,y21,y22,y23,y24 [ , . . . , y2n]
,Y=z3,y31,y32,y33,y34 [ , . . . , y3n]
,Y=z4,y41,y42,y43,y44 [ , . . . , y4n]
[ ,...,Y=zm,ym1,ym2,ym3,ym4 [ , . . . , ymn]]
■Approximates a family of curves by specifying the corresponding y values, y1,y2,y3,y4[, . . . ,yn], for the x values at unique z values (z1[, . . . ,zm]).
■Values must be constants; Adams Solver (FORTRAN) does not allow expressions.
■Values for z must be in increasing order: z1 < z2 < z3, and so on.
LIST
Lists the current SPLINE data.
See other Reference data available.