Format

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

Description

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

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>

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.