If the errors of the rectangular co-ordinates of these lines are known, the problem of determining the co-ordinates of any star-image on the plate becomes reduced to the comparatively simple one of interpolating the co-ordinates of the star relative to the sides of the 5 mm.
Up to the present time its verses are used as amulets; it is employed in the lamentations for the dead; it has been frequently edited and made the basis for other poems, and new poems have been made by interpolating four or six lines after each line of the original.
Vacarescu described the history of the Ottoman empire from the beginning to 1791, interpolating doggerel verses.
The Spline Estimation option offers a variety of interpolating and smoothing splines.
