AKISPL

Returns the interpolated value or n-th derivative of the interpolated value of Reference_Spline element.

Format

AKISPL(x,z,id) or AKISPL(x,0,id, n)

Arguments

x
The independent variable of the curve.
z
The independent variable z of the surface. Use z=0 if only one curve is being defined.
id
The ID of the Reference_Spline element.
n
The order of the derivative desired. Not applicable with surfaces. Must lie between 0 and 2.

Example

<Reference_Variable
id              = "30300100"
type            = "EXPRESSION"
expr            = "AKISPL(VARVAL(30300900),0,303003)"
/>
<Reference_Spline
id            = "303003"
num_xy_pair   = "5"
linear_extrap = "FALSE">
-1.5000000E+01  -1.0006700E-01
-1.4900000E+01  -1.0006700E-01
-1.4800000E+01  -1.0006800E-01
-1.4700000E+01  -1.0006800E-01
-1.4600000E+01  -1.0006800E-01
</Reference_Spline>