[mesa-users] The choice of interpolant in interp_1d_lib

[Bill Paxton]

Hi Ehsan,

All of those options are doing cubic interpolation, so on a monotonic data set they should be giving essentially the same results. 
They differ in how the deal with non-monotonicity.  You should makes plots using all of them and decide what you like.

-B



On Nov 28, 2014, at 8:27 AM, Ehsan Moravveji wrote:

> Dear all,
> I would like to interpolate some of the profiles in MESA on a new mass grid. The reason is that from one timestep to the next, the s% nz does not necessarily stay constant, but goes up and down. For that, I looked into interp_1d_lib public module to check what is on the menu! 
> The interpolate_vector() there can fully serve me, since I need to interpolate a 1d vector. However, there are multiple choices of the interpolant, like:
> - interp_pm
> - interp_m3
> - interp_m3a
> - interp_m3b
> - interp_m3q
> 
> To make the best decision, I would like to know which of these are more suitable for monotonically decreasing profiles like temperature, and which are better suited for bumpy profiles like eps_nuc, opacity etc.
> 
> I would be grateful to receive your feedbacks.
> 
> Have a nice weekend,
> Ehsan.
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