I have data points for a circle and would like to plot it with Mathematica.

ListPlot[a, PlotLabel -> "MeshPoints", AxesLabel -> {"x", "y"},
PlotRange -> {{-2, 2}, {-2, 2}}]


But the axes are not correct, the plot looks like an ellipse. How can I render my plot to get the axis scales equal so my plot looks like a circle, not like an ellipse.

This is my plot

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marked as duplicate by Mr.Wizard♦Apr 18 '13 at 7:03

Use AspectRatio->Automatic option which "determines the ratio of height to width from the actual coordinate values in the plot."
a = Table[{Cos[t], Sin[t]}, {t, 0, 2 Pi, .1}];