LINSPL

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

Format

LINSPL(x,z,id) or LINSPL(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

<Force_Scalar_TwoBody
id             = "301001"
type           = "Force"
i_marker_id    = "10506"
j_marker_id    = "10706"
val_expression = "LINSPL(DM(10503,10703),0,301002)"
/>
<Reference_Spline
id             = "301002"
num_xy_pair    = "5"
linear_extrap  = "FALSE">
0.0000000E+00  -2.2000000E+02
2.0000000E+02  -2.2000000E+02
2.3000000E+02  -2.2000000E+02
3.7322400E+02  -1.1000000E+02
5.0000000E+02  -1.1000000E+02
</Reference_Spline>