I was wondering whether it makes any sense to use R-squared for the graph/model. I think it is not since it does not clearly explain a linear relation.
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Wietze
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1Is that a time series? – Dave Jun 28 '21 at 04:22
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1$R^2$ does not necessarily explain a linear relationship. It assesses how well a model fits to data: R-squared is equal to 81% means what? – Stephan Kolassa Jun 28 '21 at 04:50
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Could you please clarify what "use $R^2$" might mean in this setting? – whuber Jun 28 '21 at 11:11