[Help-gsl] cspline: variable number of points

[Greg Vesper]

Hello,

The following snippet doesn't work, yelling at me that gsl_spline_alloc 
and gsl_spline_init have been passed different lengths.
As far as I can tell from the code, it's impossible to do this. (I'm 
only interested in the case of newnbins<nbins).

A) Can anyone tell me if I'm correct in this or provide a way to 
accomplish this without freeing and re'alloc?
B) Would there be something wrong with writing it in this manner so long 
as an error is returned from gsl_spline_init if newnbins > nbins?

{
  int nbins = 100;
  gsl_spline *vmax_spl;
  gsl_interp_accel *vmax_spa;
  vmax_spa = gsl_interp_accel_alloc();
  vmax_spl = gsl_spline_alloc( gsl_interp_cspline, nbins );

  int newnbins = 50
  gsl_spline_init( vmax_spl, &lrvals[0], &vvals[0], newnbins );

  ...
  gsl_spline_free(vmax_spl);
  gsl_interp_accel_free(vmax_spa);
}