Can`t visualize Green function

[DFTsher]

Hello triqs community!
I try to do some basic tutorial of triqs, such as The Anderson impurity model and [Multiorbital impurity model]https://triqs.github.io/cthyb/latest/guide/slater_five_band.html. And calculation goes well. But when I try to visualize the Green's function using the codes provided on the corresponding exercise pages, nothing happens (no massages, no new files etc). There is a feeling that triqs simply does not find or does not use triqs.gf. Can you help me with this issue?

[the-hampel]

Hi @DFTsher ,
let maybe stick to the first tutorial you are mentioning: https://triqs.github.io/cthyb/latest/guide/aim.html . Did the first part work, e.g. run the DMFT iterations and store results into the h5 archive:

if mpi.is_master_node():
    with HDFArchive("aim_solution.h5",'w') as Results:
        Results["G_tau"] = S.G_tau
        Results["G_iw"] = S.G_iw
        Results["G_l"] = S.G_l

Then you should find a new file aim_solution.h5 in your directory? And then you run:

with HDFArchive('aim_solution.h5','r') as ar:
    oplot(ar['G_iw']['up'], '-o', x_window = (0,10))

and this does not work you say? What exactly is the error message given to you from python?

I just tried this with the recent triqs/3.2.x version and it works as written in the tutorial.

[DFTsher]

Well, nothing, few seconds and empty command line. By exception method (the triqs.gf and h5 packages were used in the aim.py file), it could be that trix cannot find the triqs.plot.mpl_interface package. Or it could be a rendering issue on the cluster itself. If so, is it possible to save the graph to a file?

[the-hampel]

Where and how do you execute the script? The plotting is only possible if you are in an active X session. This is using matplotlib to show the plot. If you run this on the cluster via ssh likely nothing will happen and wait forever to close the plot. The visualization should be done afterwards locally.

[DFTsher]

I ran it on ssh cluster with x11. I guess that was a problem. Is there any instructions how to run it locally?

[the-hampel]

Running the solver etc. on the cluster is exactly how it is intended to be done. You can simply transfer the h5 file to your local laptop and then run the last plotting lines and all post-processing in a jupyter notebook on your laptop (or maybe even on the cluster if your cluster provides jupyterhub or similar)? If you need help installing triqs on your laptop you can find help here: https://triqs.github.io/triqs/latest/install.html .