Fig. 3

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Variation of the metallicity (upper panel) between the APOGEE and GALAH values as function of the effective temperature and colour-coded by the median surface gravity from GALAH, for the stars of the training/validation sample (see Sect. 3.1). The lower panel shows the variation of the surface gravity between the two surveys as function of the effective temperature and median metallicity values from GALAH for the same stars.
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