Solved
Ploting graph Mathcad 15 M 50
Comment exporter un graphique avec une qualité supérieure
Not sure what kind of superior quality you have in mind.
Have you tried fencing the Mathcad plot and then use copy and paste? Guess you can't get any better.
Of course you could let Mathcad generate a data table, export it and let a specialized program like Origin or the like (re)draw the plot.
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