Data resampling

[jwasikpsnc]

First working version of data interpolation (not release-ready)

• ✅ added interpolate_over parameter to /data/plot_data/ endpoint
• ✅ added core functionality
• ✅ performed manual tests with artificial data
• 🛑 lacks visual data-consistency confirmation
• 🛑 lacks extensive testing with real data

Purpose of this PR is to merge functionality into develop, so the Frontend widgets can be created and integrated.

[jwasikpsnc]

@mfiaudrin-epsyl FYI

[mfiaudrin-epsyl]

Hi @jwasikpsnc,
I would like to test your functionnality but I am not sure how to type the parameter interpolate_over.
Can you give me an example to test it ?
Thanks !

[jwasikpsnc]

Hi @mfiaudrin-epsyl
You just put full uri to node you want to have on the same plot.
I have tested it like this:

http://127.0.0.1:40443/data/plot_data?uri=imas:hdf5?path=/home/ITER/wasikj/Desktop/work/IBEX/testdb1#equilibrium/time_slice[:]/profiles_2d[:]/psi&interpolate_over=imas:hdf5?path=/home/ITER/wasikj/Desktop/work/IBEX/testdb2#equilibrium/time_slice[:]/profiles_2d[:]/psi

(there is testdb1 and testdb2)
If you want to add another URI to the list you just have to add another &interpolate_over=<uri> AFAIR, but i didn't checked it now.
You can always use swagger to create example curl request from parameters.
🙌

[mfiaudrin-epsyl]

Hi @jwasikpsnc,
Thank you for the functionnality. I give you my feedback on the tests I have done from your example:

• ✅ Interpolation is working as expected for time coordinate
• 🛑 Coordinates order isn't preserved whereas it must be.
  (We expect [dim1, dim2, porfiles_2d, time] but we have [time, profiles_2d, dim2, dim1])
• 🛑 Coordinates having dependencies (all except time) have an unexpected shape and incorrect values.
  (For instance, profiles_2d shape is [4,2]. It didn't change but it should be [4, 4]. Moreover, it returns an array of shape [4]. On the end, the vector looks to not be interpolated as expected because we have: A == [0, 1] ; B == [0, 1, 2, 3] ; AB == [1, 2, 3, 4] whereas it should be [0, 1, 2, 3])

My tests are done with:

• A = /data/plot_data?uri=imas:hdf5?path=/home/ITER/wasikj/Desktop/work/IBEX/testdb1#equilibrium/time_slice[:]/profiles_2d[:]/psi
• B = /data/plot_data?uri=imas:hdf5?path=/home/ITER/wasikj/Desktop/work/IBEX/testdb2#equilibrium/time_slice[:]/profiles_2d[:]/psi
• AB = /data/plot_data?uri=imas:hdf5?path=/home/ITER/wasikj/Desktop/work/IBEX/testdb1#equilibrium/time_slice[:]/profiles_2d[:]/psi
  &interpolate_over=imas:hdf5?path=/home/ITER/wasikj/Desktop/work/IBEX/testdb2#equilibrium/time_slice[:]/profiles_2d[:]/psi

[olivhoenen]

Hi @jwasikpsnc, I would like to test your functionnality but I am not sure how to type the parameter interpolate_over. Can you give me an example to test it ? Thanks !

@jwasikpsnc this question from the main dev of the frontend hints at an important lack of API documentation for the backend, this should be addressed please.