![Dependences of the prediction errors on the spectral signal-to-noise ratio for the StarGRUNet-LAMOST catalogue, the LASP catalogue (Luo et al. 2015), the GSN catalogue (Rui et al. 2019b), and the LASSO-MLPNet catalogue (Li et al. 2022b). The horizontal coordinates represent the S/Ng intervals [5,8), [8,10), [10,20), [20,30), [30,40), [40,50), [50,80), [80,100), and [100, + ∞), respectively. The first, second, and third columns represent ${T}_\texttt {eff}$, log g, and [Fe/H], respectively. The first, second, and third rows respectively represent the mean μ, the standard deviation σ, and the mean of the absolute error MAE of the difference between (the LASP catalogue, GSN catalogue, LASSO MLPNet catalogue, StarGRUNet catalogue) and the APOGEE DR17 catalogue. Triangles, squares, crosses, and circles indicate the evaluation results for the LASP catalogue, the GSN catalogue, the LASSO-MLPNet catalogue, and the StarGRUNet-LAMOST catalogue, respectively. It should be noted that the LASSO-MLPNet catalogue only gives estimates for spectra with 5 ≤ S/Ng ≤ 80. Therefore, the curves of the LASSO-MLPNet catalogue disappear on the last two S/Ng intervals.](https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/mnras/521/4/10.1093_mnras_stad831/1/stad831fig11.jpeg?Expires=1749317526&Signature=DtJRmdstwbJq~pi8oWdQ5XwlTbgwQCqqhgk5b74UyHxM5Q8rITytq3JkMBrjlXux3vKu6yHV8h0asHsTjb7bRinsh5ajJaNb~8irzOu51~-5xbMwRv27cU6PBOCpK8cUB3xSrVasYRjHegJ-1eqzjTr44uAj7k-v3lOwcFi9pp0KITV6IJOdODIl~LONf7K7VGFDjFUXnctD6Gfh0Ww4MntAVdNFO83qylpRd588V8qJQc7sALxExS6pdJpnqg6XkFc1rYo9tyPW0jFIlisEkofbHs-jxJawwaNE4eT9saVo3mrld4hGJwnlg-EO59eWfiyMxOo1mUOx8SRvPU53vw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Dependences of the prediction errors on the spectral signal-to-noise ratio for the StarGRUNet-LAMOST catalogue, the LASP catalogue (Luo et al. 2015), the GSN catalogue (Rui et al. 2019b), and the LASSO-MLPNet catalogue (Li et al. 2022b). The horizontal coordinates represent the S/Ng intervals [5,8), [8,10), [10,20), [20,30), [30,40), [40,50), [50,80), [80,100), and [100, + ∞), respectively. The first, second, and third columns represent |${T}_\texttt {eff}$|, log g, and [Fe/H], respectively. The first, second, and third rows respectively represent the mean μ, the standard deviation σ, and the mean of the absolute error MAE of the difference between (the LASP catalogue, GSN catalogue, LASSO MLPNet catalogue, StarGRUNet catalogue) and the APOGEE DR17 catalogue. Triangles, squares, crosses, and circles indicate the evaluation results for the LASP catalogue, the GSN catalogue, the LASSO-MLPNet catalogue, and the StarGRUNet-LAMOST catalogue, respectively. It should be noted that the LASSO-MLPNet catalogue only gives estimates for spectra with 5 ≤ S/Ng ≤ 80. Therefore, the curves of the LASSO-MLPNet catalogue disappear on the last two S/Ng intervals.
