Ordinate extrapolation from an abscissa

[Fabien25]

Hi, I have defined a spline and I need to evaluate an abscissa from an ordinate. I know that it's possible to do the opposite. Does it possible?

data_element create spline &
spline=Spline name&
x= -180,-30,-10,-5,-0.5,0,0.5,5,10,30,180 &
y= -10,-6,-4,-2,-0.5,0,0.5,2,4,6,10 &
linear_extrapolate= yes &
units=no_units

Thanks a lot

 

[jslat]

Run-time or design-time?

Run-time it is not possible, directly at least.
Using ADAMS/View it is very easy to create a second spline which references the first one:

data_element create spline &
spline_name = .model_1.SPLINE_2 &
x = (.model_1.SPLINE_1.ys) &
y = (.model_1.SPLINE_1.xs)

and then use this one. Note that this requires that a spline must have the independent values in strictly increasing order, which it is in your case.

To do this in design-time, well the principle will be the same.

Jesper Slattengren

http://www.prattmiller.com