util/

vis_spline.pro

includes main-level program

Creates a 2-dimensional spline curve through the given x- and y-coordinates.

A spline curve through some points can easily be computed:

  IDL> pts = vis_spline([1, 3, 5], [1, 5, 3])

To display this curve:

  IDL> plot, findgen(11), /nodata, xstyle=9, ystyle=9
  IDL> plots, pts

See the main-level program at the end of this file for a more involved example:

  IDL> .run vis_spline

Todo:

this should break down segments so that the x passed into SPL_INTERP is always monotonically increasing

result = vis_spline(x, y [, n_points=long] [, _extra=keywords])

Creates a 2-dimensional spline curve through the given x- and y-coordinates.

fltarr(2, n) or dblarr(2, n)

x in required type=numeric vector

x-coordinates of input points

y in required type=numeric vector

y-coordinates of input points